CN112901545B - Method, device and system for controlling temperature field of air cooling fan - Google Patents
Method, device and system for controlling temperature field of air cooling fan Download PDFInfo
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- CN112901545B CN112901545B CN202110135694.XA CN202110135694A CN112901545B CN 112901545 B CN112901545 B CN 112901545B CN 202110135694 A CN202110135694 A CN 202110135694A CN 112901545 B CN112901545 B CN 112901545B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/02—Arrangements or modifications of condensate or air pumps
- F01K9/023—Control thereof
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Abstract
The invention discloses a method, a device and a system for controlling a temperature field of an air cooling fan, which are used for solving the problem of inconsistent temperature of the temperature field of the air cooling fan. This scheme includes: acquiring the temperature information of the row fans of the fan group; sending corresponding first control instructions to each row of fans according to the temperature information of the rows of fans; acquiring temperature information of each fan of the fan set controlled by the first control instruction; and sending corresponding second control instructions to the fans according to the temperature information of the fans. According to the scheme of the embodiment of the invention, the temperature of the position of each row of fans is adjusted through the first control instruction, and then the temperature of the position of each fan is adjusted through the second control instruction, so that the temperature influence on the positions of adjacent fans after the rotating speed of the fans is changed in the adjusting process is reduced, the integral temperature consistency of the temperature field is improved, and the quick and effective temperature adjustment is realized.
Description
Technical Field
The invention relates to the field of automatic control, in particular to a method, a device and a system for controlling a temperature field of an air cooling fan.
Background
The air cooling fan has obvious water-saving effect, so that the air cooling fan is widely applied to thermal power generating units in the north. The rotating speed of each axial flow fan of the traditional air cooling system is consistent with the total rotating speed instruction of the air cooling fans, so that heat exchange between the exhaust steam of the steam turbine and cold air is continuously completed, and the exhaust steam is cooled into condensed water. However, under the condition that the rotating speeds of the air cooling fans are consistent, the influence of environmental wind and fan structures is received, the heat exchange efficiency of each air cooling fan has a large difference, the balance of a temperature field cannot be kept, and the phenomenon of insufficient heat exchange or partial freezing of a tube bundle easily occurs, so that the safe and economic operation of a unit is influenced.
How to improve air cooling fan temperature field temperature uniformity is the technical problem that this application will solve.
Disclosure of Invention
The embodiment of the application aims to provide a method, a device and a system for controlling the temperature field of an air cooling fan, which are used for solving the problem of inconsistent temperature of the temperature field of the air cooling fan.
In a first aspect, a method for controlling a temperature field of an air cooling fan is provided, which includes:
acquiring row fan temperature information of a fan set, wherein the fan set comprises a plurality of fans arranged in an array, and the row fan temperature information comprises first temperature values of positions of the rows of fans in the fan set;
Sending a corresponding first control instruction to each row of fans according to the temperature information of the rows of fans, wherein the first control instruction is used for controlling the temperature of the position of each row of fans in the fan set to a first target temperature value, and the first target temperature value is determined according to the first temperature value;
acquiring temperature information of each fan of the fan set controlled by the first control instruction, wherein the temperature information of each fan comprises a second temperature value of the position of each fan in the fan set;
and sending corresponding second control instructions to the fans according to the temperature information of the fans, wherein the second control instructions are used for controlling the temperature of the position of each fan in the fan set to a second target temperature, the second target temperature value is determined according to the second temperature value, and the first control instructions and the second control instructions are used for controlling the rotating speed of the fans of the fan set.
In a second aspect, a temperature field control device for an air cooling fan is provided, which includes:
the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring row fan temperature information of a fan group, the fan group comprises a plurality of fans which are arranged in an array, and the row fan temperature information comprises first temperature values of positions of the fans in each row in the fan group;
The first control module is used for sending corresponding first control instructions to the rows of fans according to the temperature information of the rows of fans and controlling the temperature of the positions of the rows of fans in the fan group to a first target temperature value, and the first target temperature value is determined according to the first temperature value;
the second acquisition module is used for acquiring the temperature information of each fan of the fan set controlled by the first control instruction, wherein the temperature information of each fan comprises a second temperature value of the position of each fan in the fan set;
and the second control module is used for sending corresponding second control instructions to the fans according to the temperature information of the fans, and controlling the temperature of the position of each fan in the fan set to a second target temperature, wherein the second target temperature value is determined according to the second temperature value, and the first control instructions and the second control instructions are used for controlling the fan rotating speed of the fan set.
In a third aspect, a system for controlling a temperature field of an air cooling fan is provided, comprising:
the air-cooling fan temperature field control device according to the second aspect;
and the plurality of fans are connected with the air cooling fan temperature field control device in a communication manner and are arranged in an array manner.
In a fourth aspect, an electronic device is provided, the electronic device comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fifth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method as in the first aspect.
In the embodiment of the application, the temperature information of the row fans of the fan set is obtained; sending corresponding first control instructions to the fans in the rows according to the temperature information of the fans in the rows; acquiring temperature information of each fan of the fan group after the temperature information is controlled by the first control instruction; and sending corresponding second control instructions to the fans according to the temperature information of the fans. According to the scheme of the embodiment of the invention, the row temperature adjustment is carried out on the temperature of the position of each row of fans through the first control instruction, and then the temperature of the position of each fan is adjusted through the second control instruction, so that the temperature influence on the position of the adjacent fan after the rotating speed of the fan is changed in the adjustment process is reduced, the integral temperature consistency of the temperature field is improved, and the quick and effective temperature adjustment is realized.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic flow chart of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 2 is a second flowchart illustrating a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 3a is a third schematic flow chart of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 3b is a schematic control command diagram of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 4a is a fourth schematic flowchart of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 4b is a second control command diagram of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 4c is a schematic diagram of a positional relationship between adjacent fans of a fan set in a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 5 is a fifth flowchart illustrating a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 6a is a sixth schematic flowchart of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 6b is a third schematic control command diagram of a method for controlling a temperature field of an air-cooling fan according to an embodiment of the present invention.
Fig. 7a is a schematic structural diagram of a temperature field control device for an air-cooling fan according to an embodiment of the present invention.
Fig. 7b is a second schematic structural diagram of a temperature field control device for an air-cooling fan according to an embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a temperature field control system of an air cooling fan according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The reference numbers in the present application are only used for distinguishing the steps in the scheme and are not used for limiting the execution sequence of the steps, and the specific execution sequence is described in the specification.
The air cooling fan is a heat exchange device which uses ambient air as a cooling medium and forces the air to transversely sweep the outside of the fin tube so as to cool or condense high-temperature process fluid in the tube. The air cooler unit can be composed of a finned tube bundle, a fan and a frame, and auxiliary parts such as shutters, maintenance platforms and ladders. The air cooling fan uses natural air as a cooling medium, thereby saving precious water resources, reducing the discharge of industrial sewage and protecting the natural environment. The air cooler can be used for cooling or condensation and is widely applied to production and life.
In a thermal power generating unit, an air cooling fan can be used for completing heat exchange between exhaust steam of a steam turbine and cold air and cooling the exhaust steam into condensed water. In a fan unit including a plurality of fans, the control of the heat exchange effect may be achieved by controlling the rotation speed of each fan. For example, the heat exchange efficiency is improved by increasing the rotation speed of the fan.
In practical application, the rotating speed of the air cooling fan can be controlled by issuing a rotating speed instruction. If the rotating speed instruction containing the same rotating speed is issued to each fan in the fan set, the influence of the fan structure and the ambient wind is received, the heat exchange capacity of the fin tube bundles in different areas of the fan set is greatly different, the temperature of the temperature field of the fan set is not uniform, the utilization rate of the heat transfer area is low, and the safe and economic operation of the fan set is influenced.
In actual production, the influence of environmental wind on the heat exchange efficiency of the fan can be researched by numerically simulating the turbulence distribution inside the fan set in Fluent software by a Computational Fluid Dynamics (CFD) method. The method can directly calculate the rotating speed theoretical value of each fan which enables the temperature field to be balanced under different environmental winds.
However, the direct temperature field equalization algorithm is affected by the accuracy of the model, and the model has difficulty in considering all the disturbances, resulting in inaccurate calculation results. And moreover, the turbulence distribution in the air cooling fan can change slowly along with the operation of the fan, and the temperature field of the fan is difficult to control and balance quickly and effectively.
In order to solve the problems in the prior art, an embodiment of the present application provides a method for controlling a temperature field of an air cooling fan, where an execution main body in the embodiment of the present application may be an electronic device such as a server and a terminal, and the execution main body may be disposed inside a fan of a fan group, or may be disposed outside the fan and communicatively connected to each fan in the fan group in a wired or wireless communication manner, so as to implement information communication and instruction issue. As shown in fig. 1, the scheme provided by the embodiment of the present application includes the following steps:
S11: the method comprises the steps of obtaining row fan temperature information of a fan set, wherein the fan set comprises a plurality of fans which are arranged in an array mode, and the row fan temperature information comprises first temperature values of positions of the rows of fans in the fan set.
In this embodiment, the fan group includes a plurality of fans arranged in an array, and the shape of the fan group can be set according to actual production requirements, which is not limited in this application. In this example, the number of rows of the plurality of fans arranged in an array is 8, the number of columns is 8, the fans are arranged in a rectangle, and the number of the fans is 64.
The temperature information of the row of fans can be obtained by measuring through a temperature sensor, and one row of fans corresponds to a first temperature value. Optionally, temperature sensors are respectively arranged at the head, middle and tail positions of a row of fans to measure the temperature of each position of the row of fans, and a first temperature value of the position where the row of fans is located is generated by combining the temperature of each position of the row of fans. The first temperature value is used for representing the temperature of the position of the row of fans.
S12: and sending corresponding first control instructions to the fans in the rows according to the temperature information of the fans in the rows, wherein the first control instructions are used for controlling the temperature of the positions of the fans in the rows to a first target temperature value, and the first target temperature value is determined according to the first temperature value.
And determining a first target temperature value according to the first temperature value of each row of fans in the row fan temperature information of the fan group and the actual requirement. For example, an average of the first temperature values of the rows of fans may be determined as the first target temperature value, or the first temperature value of a certain row of fans may be determined as the first target temperature value.
In this step, a first control instruction is sent to the row fans of which the temperature needs to be adjusted in the fan set, the first control instructions sent to different row fans can be different, and the first control instruction is used for performing unified control on the rotating speed of each fan in the corresponding row fan. For example, when the temperature of a certain row of fans in the fan set is higher than a first target temperature value, a corresponding first control instruction is generated to control the rotating speed of the row of fans to be increased by 5%, so that the heat exchange efficiency is improved, and the cooling is realized.
Alternatively, the first control instruction may be offset based on the current rotation speed of the row fan, for example, the first control instruction in the above example is used to control the rotation speed of the corresponding row fan to increase by 5%. Or the first control instruction can also adjust the rotating speed of the corresponding row of fans to a uniform rotating speed value.
S13: and acquiring the temperature information of each fan of the fan set controlled by the first control instruction, wherein the temperature information of each fan comprises a second temperature value of the position of each fan in the fan set.
And through the control of the first control instruction, each row of fans of the fan set is preliminarily adjusted. Under the action of the first control instruction, the temperature of the positions of the fans in each row is uniformly controlled to be the first target temperature value. Because the positions and structures of the rows of fans are often different, the fan group temperature field controlled by the first control instruction may still have a phenomenon of slight temperature unevenness.
In this step, the temperature information of each fan of the fan set controlled by the first control instruction is obtained, the temperature information of each fan can be obtained by measuring with a temperature sensor arranged at the position of the fan, and one fan corresponds to one second temperature value.
S14: and sending corresponding second control instructions to the fans according to the temperature information of the fans, wherein the second control instructions are used for controlling the temperature of the position of each fan in the fan set to a second target temperature, and the second target temperature value is determined according to the second temperature value, wherein the first control instructions and the second control instructions are used for controlling the fan rotating speed of the fan set.
And determining a second target temperature value according to the second temperature value of each fan in the fan temperature information of the fan group and the actual requirement. For example, an average of the second temperature values of the fans may be determined as the second target temperature value, or the second temperature value of a certain fan may be determined as the second target temperature value.
In this step, a second control instruction is sent to the fans of the fan unit, the temperature of which needs to be adjusted, and the second control instructions sent to different fans can be different, and the second control instruction is used for performing unified control on the rotating speeds of the corresponding fans. For example, the temperature of a certain fan in the fan set is higher than the second target temperature value, and a corresponding second control instruction is generated to control the rotating speed of the fan to be increased by 5%, so that the heat exchange efficiency is improved, and the cooling is realized.
Alternatively, the second control instruction may be offset based on the current rotation speed of the fan, for example, the second control instruction in the above example is used to control the rotation speed of the corresponding fan to increase by 5%. Or the second control instruction can also adjust the rotating speed of the corresponding fan to a uniform rotating speed value.
Optionally, when the temperature information is acquired in steps S11 and S13 in this embodiment, the temperature information may be acquired by using a device such as an infrared camera, in addition to the temperature sensor arranged in the fan unit. For example, an infrared camera is arranged near the fan set, and the infrared camera can be fixed on a support frame or a wall surface or can be movable. The infrared camera is used for shooting the area where the fan set is located so as to acquire the temperature of each area of the fan set, and can be used for acquiring the temperature information of the row fan or the temperature information of each fan.
According to the embodiment of the application, the temperature information of the row fans of the fan unit is acquired; sending corresponding first control instructions to the fans in the rows according to the temperature information of the fans in the rows; acquiring temperature information of each fan of the fan set controlled by the first control instruction; and sending corresponding second control instructions to the fans according to the temperature information of the fans. According to the scheme of the embodiment of the invention, the row temperature adjustment is carried out on the temperature of the position of each row of fans through the first control instruction, and then the temperature of the position of each fan is adjusted through the second control instruction, so that the temperature influence on the position of the adjacent fan after the rotating speed of the fan is changed in the adjustment process is reduced, the integral temperature consistency of the temperature field is improved, and the quick and effective temperature adjustment is realized.
Due to the fact that air in different fan units in the air cooling fan unit flows complicatedly, under the action of ambient wind, the rotating speed of the fan of each unit is difficult to control accurately, and the temperature field of the fan is balanced. In the scheme that this application embodiment provided, after obtaining the temperature of each row, each fan, unified formulation fan rotational speed adjustment strategy avoids carrying out the temperature of fan around the rotational speed adjustment by a wide margin to certain fan, and this scheme can improve the temperature uniformity of fan group temperature field fast effectively, makes the heat transfer ability of air cooling unit finned tube bank more even, promotes finned tube bank heat-transfer surface's utilization efficiency, reduces the unit backpressure, makes the unit obtain best operating efficiency. In addition, the scheme provided by the embodiment of the application can be combined with the CFD method to cooperatively control the rotating speed of the air cooling fan, so that the adverse effect of complex environmental factors on temperature field regulation is reduced.
Based on the method provided by the foregoing embodiment, optionally, as shown in fig. 2, the foregoing step S11 includes the following steps:
s21: and respectively acquiring the temperature value of the position of each fan in the fan set.
In this step, the temperature value of the position of each fan can be measured and obtained through the temperature sensors respectively arranged on each fan.
S22: and determining the first temperature value of the position of each row of fans according to the average value of the temperature values of the positions of the fans in the same row.
The fans in the fan group are different in position and structure, and the temperatures of the positions of the fans at different positions are different. In order to improve the accuracy of the first temperature value representing the temperature of the position where the corresponding row of fans are located, the average temperature value of the positions where the fans located in the same row are located is determined as the first temperature value of the row of fans.
Besides determining the average value as the first temperature value of the fan in the row, the first temperature value may also be determined according to the mode and the median of the temperature values of the positions of the fans in the same row.
S23: and generating the temperature information of the rows of fans according to the first temperature values of the positions of the rows of fans.
The generated row fan temperature information comprises a first temperature value of the position of each row of fans in the fan group. Optionally, the temperature information may be represented in a form of a table, an array, a set, or the like, so as to perform efficient transmission or data storage on the temperature information of the column fan.
According to the scheme provided by the embodiment of the application, the temperature information of the position where each fan is located in the fan set is fully utilized, the accuracy of the generated first temperature value is improved, and then the generated temperature information of the row fans accurately represents the temperature of the position where each row fan is located. The method is favorable for reducing control errors and improving the temperature control accuracy.
Based on the method provided by the foregoing embodiment, optionally, as shown in fig. 3a, the fan set includes a reference blower and a non-reference blower, where the step S12 includes the following steps:
s31: determining a first temperature difference value between a first temperature value of the position of the target non-reference row fan and the first target temperature value, wherein the first target temperature value is determined according to the first temperature value of the position of the reference row fan.
The reference row fans and the non-reference row fans can be preset according to requirements, the number of the reference row fans can be multiple rows, and the number of the non-reference row fans can also be multiple rows. Optionally, the reference row of fans in the fan set includes a head row of fans and/or a tail row of fans in the fan set. Compare with the row fan that is located the centre, the adjacent fan quantity of head row fan and tail row fan is less, is difficult for receiving the temperature influence of adjacent fan, so the temperature of head and tail row fan is more stable for the temperature of middle row fan. The first-row and/or tail-row fans are used as a reference row, so that the effectiveness of temperature control can be improved, and the adverse effect of environmental factors on the temperature control can be reduced.
When the number of the reference row fans is multiple rows, the first target temperature value may be determined according to an average number, a mode, or a median of the first temperature values at positions where the multiple rows of reference row fans are located. When the number of the reference row fans is one row, the first temperature value of the position of the reference row fan can be determined as the first target temperature value.
In this step, the target non-reference row fan may be one of the non-reference row fans. Through the step, the first temperature difference value between the first temperature value of the position of each row of non-reference row fans and the first target temperature value is respectively determined, and any row of non-reference row fans corresponds to one first temperature difference value.
S32: and generating a first control instruction corresponding to the target non-reference row fan according to the first temperature difference value.
The first temperature difference value can represent the temperature of the corresponding non-reference row fan to be adjusted, and when the first temperature difference value is a positive number, the temperature of the position where the corresponding non-reference row fan is located is high, and the rotating speed of the fan needs to be increased to achieve cooling. The generated first control instruction may control the rotational speed offset of the corresponding non-reference row fan based on the magnitude of the first temperature difference.
Specifically, a corresponding relationship between the first temperature difference value and the fan rotation speed offset value may be preset by a CFD method, and the first control instruction may be generated based on the corresponding relationship. Or, a corresponding relation between the temperature difference value grade and the rotating speed offset value may be preset, and the rotating speed offset value is determined according to the grade corresponding to the first temperature difference value, and the first control instruction is generated. For example, when the temperature difference is within 2 degrees, the rotating speed offset value is 5 percent; when the temperature difference is within 5 degrees, the rotating speed offset value is 10 percent, and the like. It should be understood that the above numerical values are only used for illustrating the present solution, and can be freely set according to the production requirements in practical application.
S33: and sending a corresponding first control instruction to the target non-reference train fan.
In this step, corresponding first control instructions are sent to each non-reference row fan respectively, and the first control instructions can be used for controlling the fan rotating speed bias, so that the rotating speed of the fan is increased or reduced on the basis of the current rotating speed, the heat exchange efficiency is controlled, and the temperature is quickly and effectively adjusted.
For example, in the present embodiment, the reference row fan is the first row fan in the fan set, as shown in fig. 3 b. In order to realize the balance of the inter-row temperature, the rotating speed of the first row fan does not need to be corrected by taking the average temperature of the first row fan as a reference. And respectively generating first control commands for controlling the rotating speed offset of the fan for the second row to the eighth row of fans. In this example, the generation and issuing of the instructions may be implemented using a PID (proportional-integral-derivative) controller. For example, the first temperature difference is input to the PID, that is, the first temperature of the first row of fans (the average temperature of each fan in the first row) and the first temperature of the second row of fans (the average temperature of each fan in the second row) are input to the PID, and the PID outputs a first control command according to the first temperature difference, so as to control the second row of fans to realize the offset based on the current rotation speed of the second row. Accordingly, the third to eighth rows of fans also sequentially perform the bias control similar to the above example.
For example, if the current row temperature is higher than the first target temperature value, the PID output is increased to control the fan rotation speed of the current row to increase, so that the temperature of the row is rapidly decreased, the average temperature of the fan in the previous row is looked at, and the first step of temperature field equalization adjustment is completed from the perspective of the row average temperature.
Optionally, in practical application, the adjustment may be sequentially performed on each non-reference row fan according to the position of the non-reference row fan. For example, the first row of fans is taken as a reference row of fans, and the second row of fans to the eighth row of fans are adjusted in sequence. Then, the first temperature value of the position where the first row of fans is located may be first used as a first target temperature value, a first control instruction for controlling the second row of fans is generated according to the first temperature value of the position where the second row of fans is located, and the first control instruction is issued to the second row of fans to realize control of the second row of fans.
Subsequently, since the second row of fans has finished temperature unification with the first row of fans, the third row of fans may be continuously adjusted with the adjusted second row of fans as a reference row of fans. And the rest can be done by analogy until the adjustment of the eighth row of fans is finished.
Based on the method provided by the foregoing embodiment, optionally, as shown in fig. 4a, the foregoing step S14 includes:
S41: and determining a second temperature value of the position of the target fan and a target temperature average value, wherein the target temperature average value is determined according to the second temperature value of the position of at least one fan adjacent to the target fan and the average value of the second temperature values of the positions of the target fans.
Taking the second row of fans as an example, as shown in fig. 4b, for convenience of description, the 8 fans in the second row are denoted by #1 to #8 in this embodiment in sequence. In order to achieve temperature field equalization between adjacent fans, the fan # 1 is adjacent to the fan # 2, and in this step, the target temperature average value is an average value of the second temperature values of the two fans # 1 and # 2.
S42: and generating a second control instruction corresponding to the target fan according to a second temperature value of the position of the target fan and the target temperature average value.
Assuming that the second control command is generated using the PID, the PID is inputted with the second temperature value of the #1 fan and the average value of the second temperature values of the #1 and #2 fans to generate the second control command for controlling the #1 fan rotational speed offset.
S43: and sending the corresponding second control instruction to the target fan.
And sending the second control instruction to the #1 fan to control the #1 fan to offset on the basis of the rotating speed adjusted by the first control instruction, so that the temperature of the position where the adjacent fan is located is adjusted.
In this embodiment, #1 is based on the #2 fan temperature, that is, the PID inputs are the #1 fan temperature and the average temperature of the #1 and #2 fans, and the offset is added to the second row rotational speed after the coarse adjustment. And in the row of fans, generating a second control instruction for controlling the rotating speed offset of the fans according to the second temperature value of the adjacent fan of each fan, and performing fine adjustment on each fan after row adjustment to ensure that the temperature fields of the row of fans are coordinated and consistent.
Optionally, in the above example, the adjacent fans of the target fan only include the fans adjacent to the target fan in the row where the target fan is located, and in fact, the adjacent fans may also include fans adjacent to the target fan in a different row from the target fan. As shown in FIG. 4c, a group of 8 rows and 8 columns of fans is shown. Wherein, the dashed circle shows that the adjacent fans of the first row # 1 of fans include a first row # 2 of fans and a second row # 1 of fans. And the dotted line circle shows that the adjacent fans of the fifth row # 1 fan comprise a fourth row # 1 fan, a fifth row # 2 fan and a sixth row # 1 fan. And the dotted circle shows that the adjacent fans of the third row # 3 fan include the third row # 2 and #4 fans, the second row # 3 fan and the fourth row # 3 fan.
The second control instruction may be generated by a PID provided inside each fan. Each fan can directly increase PID bias to the rotating speed instruction of the fan by taking the temperature field of the surrounding fan as a reference, so that the balance of the local fan temperature field is realized, and the fans in all fan groups can cooperate to complete the balance control of the local temperature field. After the control is stable, the overall temperature field of the fan unit is coordinated and balanced. Each fan senses the temperature field of the surrounding fans, changes the rotating speed of the fan along with the change of the local temperature field, and realizes the integral control of the temperature field balance.
Based on the method provided in the foregoing embodiment, optionally, the target fan in the fan group includes at least one counter-flow fan.
For example, the #3 and #6 fan units in each row are countercurrent fans, which means that steam flows from bottom to top in the tube bundle, the heat transfer effect is poor, but the countercurrent fans have certain anti-freezing capability and also have the function of reverse back heating. The rest is the downstream fan, steam and condensate flow from top to bottom, the heat exchange effect is good, and the downstream fan unit is the main part of heat exchange. In the embodiment, the countercurrent fan can be used as a target fan, temperature adjustment is performed in a targeted manner, and adverse effects of the fan structure on the overall temperature field of the fan unit are reduced.
Based on the method provided by the foregoing embodiment, optionally, as shown in fig. 5, before step S11, the method further includes:
s51: and sending a rotating speed control instruction to a fan set, wherein the rotating speed control instruction is used for controlling each fan in the fan set to operate at a target rotating speed.
The rotating speed control command can be generated by PID, and can also be freely adjusted according to actual production needs. The fans in the fan set can be controlled to run at the target rotating speed through the rotating speed control instruction, the temperature adjustment of the row fans and the temperature adjustment of each fan are conveniently executed aiming at the structure and the environment of the fan set in the subsequent step, and the temperature difference of the temperature field of the fan set is prevented from being increased due to inconsistent rotating speeds.
Based on the method provided by the foregoing embodiment, optionally, as shown in fig. 6a, before S51, the method further includes:
s61: and monitoring the backpressure value of the fan unit.
The back pressure value of the fan unit can refer to the rear end pressure of the fan unit and can be obtained through real-time measurement of a sensor.
S62: and determining a target rotating speed according to the backpressure set value of the fan unit and the monitored backpressure value of the fan unit.
The back pressure set value can be generated manually in advance, or can be generated automatically according to production parameters or historical parameters. In practical applications, as shown in fig. 6b, the set back pressure value and the monitored back pressure value may be input to a PID, and the PID may output a target rotational speed of the fan assembly.
S63: and generating the rotating speed control instruction according to the target rotating speed.
The rotating speed control command may include the target rotating speed, and is issued to each row of fans and then issued to each fan in the fan group, so as to control each fan to operate at the target rotating speed. Referring to fig. 6b, the control instructions including the target rotation speed are respectively issued to eight rows of fans, and then issued to # 1-8 # fans in each row of fans, so as to realize unified control of the rotation speed of each fan in the fan group.
According to the scheme provided by the embodiment of the application, the rotating speeds of the fans are generated by referring to the air cooling backpressure set value and the actual monitoring value, the rotating speeds of the fans in the fan unit are preliminarily controlled to be consistent, the subsequent row fan control and the fan control are conveniently executed, and the temperature field temperature of the fan unit is more balanced.
The method has common applicability to the control of the temperature field of the air cooling fan of the power plant, and the strategy can be adopted to realize the balanced control of the temperature field of the fan under the condition of environmental disturbance as long as the measuring points of the temperature field of the air cooling island are arranged enough. The rotating speed of the fan can be controlled according to the temperature of the position of each fan, and then the rotating speed is reacted to the ambient temperature field, and finally the temperature of the fans is coordinated and consistent. Therefore, the heat exchange efficiency of each air cooling fan is balanced, the overall heat exchange efficiency is improved, the backpressure of the unit is reduced, the phenomenon of partial freezing of the tube bundle can be effectively prevented in winter, and the unit is operated safely and economically.
In order to solve the problems in the prior art, an embodiment of the present application provides an air cooling fan temperature field control device 70, as shown in fig. 7a, including:
the first acquiring module 71 is configured to acquire row fan temperature information of a fan set, where the fan set includes a plurality of fans arranged in an array, and the row fan temperature information includes a first temperature value of a position where each row of fans in the fan set is located;
the first control module 72 is configured to send a corresponding first control instruction to each row of fans according to the row fan temperature information, and is configured to control the temperature of the position of each row of fans in the fan group to a first target temperature value, where the first target temperature value is determined according to the first temperature value;
the second obtaining module 73 is configured to obtain temperature information of each fan of the fan set controlled by the first control instruction, where the temperature information of each fan includes a second temperature value of a position where each fan in the fan set is located;
and a second control module 74, configured to send a corresponding second control instruction to each fan according to the temperature information of each fan, so as to control the temperature of the position where each fan in the fan group is located to a second target temperature, where the second target temperature value is determined according to the second temperature value, where the first control instruction and the second control instruction are used to control the fan rotation speed of the fan group.
Based on the apparatus provided in the foregoing embodiment, optionally, the first obtaining module 71 is configured to:
respectively acquiring temperature values of the positions of the fans in the fan set;
determining a first temperature value of the position of each row of fans according to the average value of the temperature values of the positions of the fans in the same row;
and generating the temperature information of the rows of fans according to the first temperature values of the positions of the rows of fans.
Based on the apparatus provided in the foregoing embodiment, optionally, the fan set includes a reference blower train and a non-reference blower train, where the first control module 72 is configured to:
determining a first temperature difference value between a first temperature value of the position of a target non-reference row fan and the first target temperature value, wherein the first target temperature value is determined according to the first temperature value of the position of the reference row fan;
generating a first control instruction corresponding to the target non-reference row fan according to the first temperature difference value;
and sending a corresponding first control instruction to the target non-reference train fan.
Based on the apparatus provided in the foregoing embodiment, optionally, the reference row of fans in the fan set includes a leading row of fans and/or a trailing row of fans in the fan set.
Based on the apparatus provided in the foregoing embodiment, optionally, the second control module 74 is configured to:
determining a second temperature value of the position of a target fan and a target temperature average value, wherein the target temperature average value is determined according to the second temperature value of the position of at least one fan adjacent to the target fan and the average value of the second temperature values of the positions of the target fans;
generating a second control instruction corresponding to the target fan according to a second temperature value of the position of the target fan and the target temperature average value;
and sending the corresponding second control instruction to the target fan.
Based on the device provided in the above embodiment, optionally, the target fan in the fan group includes at least one counter-flow fan.
Based on the apparatus provided in the foregoing embodiment, optionally, as shown in fig. 7b, the apparatus further includes a third control module 75 for:
and sending a rotating speed control instruction to a fan set, wherein the rotating speed control instruction is used for controlling each fan in the fan set to operate at a target rotating speed.
Based on the apparatus provided in the foregoing embodiment, optionally, the third control module 75 is further configured to:
monitoring a backpressure value of the fan unit;
Determining a target rotating speed according to the backpressure set value of the fan unit and the monitored backpressure value of the fan unit;
and generating the rotating speed control instruction according to the target rotating speed.
By the device provided by the embodiment of the application, the temperature information of the row fans of the fan group is obtained; sending corresponding first control instructions to each row of fans according to the temperature information of the rows of fans; acquiring temperature information of each fan of the fan set controlled by the first control instruction; and sending corresponding second control instructions to the fans according to the temperature information of the fans. According to the scheme of the embodiment of the invention, the row temperature adjustment is carried out on the temperature of the position of each row of fans through the first control instruction, and then the temperature of the position of each fan is adjusted through the second control instruction, so that the temperature influence on the position of the adjacent fan after the rotating speed of the fan is changed in the adjustment process is reduced, the integral temperature consistency of the temperature field is improved, and the quick and effective temperature adjustment is realized.
In order to solve the problems existing in the prior art, an embodiment of the present application provides a temperature field control system for an air cooling fan, as shown in fig. 8, including:
the air-cooling fan temperature field control device 70 according to any one of the above embodiments;
And a plurality of fans 80 arranged in an array and in communication with the air cooling fan temperature field control device 70.
It should be noted that, the multiple fans 80 arranged in an array in fig. 8 are specifically 9 fans arranged in 3 rows and 3 columns. In practice, the number of fans may be more or less. And the air cooling fan temperature field control device is in communication connection with each fan.
According to the system provided by the embodiment of the application, the temperature information of the row fans of the fan unit is acquired; sending corresponding first control instructions to the fans in the rows according to the temperature information of the fans in the rows; acquiring temperature information of each fan of the fan set controlled by the first control instruction; and sending corresponding second control instructions to the fans according to the temperature information of the fans. According to the scheme of the embodiment of the invention, the row temperature adjustment is carried out on the temperature of the position of each row of fans through the first control instruction, and then the temperature of the position of each fan is adjusted through the second control instruction, so that the temperature influence on the position of the adjacent fan after the rotating speed of the fan is changed in the adjustment process is reduced, the integral temperature consistency of the temperature field is improved, and the quick and effective temperature adjustment is realized.
Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, and when the computer program is executed by the processor, the electronic device implements each process of the above-mentioned embodiment of the method for controlling a temperature field of an air-cooling fan, and can achieve the same technical effect, and in order to avoid repetition, details are not described here again.
The embodiment of the invention further provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program realizes each process of the air cooling fan temperature field control method embodiment, and can achieve the same technical effect, and is not repeated here to avoid repetition. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation 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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for controlling the temperature field of an air cooling fan is characterized by comprising the following steps:
acquiring row fan temperature information of a fan set, wherein the fan set comprises a plurality of fans arranged in an array, and the row fan temperature information comprises first temperature values of positions of the rows of fans in the fan set;
sending a corresponding first control instruction to each row of fans according to the temperature information of the rows of fans, wherein the first control instruction is used for controlling the temperature of the position of each row of fans in the fan set to a first target temperature value, and the first target temperature value is determined according to the first temperature value;
acquiring temperature information of each fan of the fan set controlled by the first control instruction, wherein the temperature information of each fan comprises a second temperature value of the position of each fan in the fan set;
and sending corresponding second control instructions to the fans according to the temperature information of the fans, wherein the second control instructions are used for controlling the temperature of the position of each fan in the fan set to a second target temperature value, and the second target temperature value is determined according to the second temperature value, wherein the first control instructions and the second control instructions are used for controlling the fan rotating speed of the fan set.
2. The method of claim 1, wherein obtaining column fan temperature information for a group of fans comprises:
respectively acquiring temperature values of the positions of the fans in the fan set;
determining a first temperature value of the position of each row of fans according to the average value of the temperature values of the positions of the fans in the same row;
and generating the temperature information of the rows of fans according to the first temperature values of the positions of the rows of fans.
3. The method of claim 1, wherein the fan group comprises a reference fan train and a non-reference fan train, and wherein sending corresponding first control commands to the fan trains based on the fan train temperature information comprises:
determining a first temperature difference value between a first temperature value of the position of a target non-reference row fan and the first target temperature value, wherein the first target temperature value is determined according to the first temperature value of the position of the reference row fan;
generating a first control instruction corresponding to the target non-reference row fan according to the first temperature difference value;
and sending a corresponding first control instruction to the target non-reference train fan.
4. The method of claim 3, wherein the reference row of fans in the set of fans includes a leading row of fans and/or a trailing row of fans in the set of fans.
5. The method of claim 1, wherein sending corresponding second control commands to each fan based on the fan temperature information comprises:
determining a second temperature value of the position of a target fan and a target temperature average value, wherein the target temperature average value is determined according to the second temperature value of the position of at least one fan adjacent to the target fan and the average value of the second temperature values of the positions of the target fans;
generating a second control instruction corresponding to the target fan according to a second temperature value of the position of the target fan and the target temperature average value;
and sending the corresponding second control instruction to the target fan.
6. The method of claim 5, wherein the target fan in the fan stack comprises at least one counter-flow fan.
7. The method of any one of claims 1 to 6, wherein before acquiring the train fan temperature information of the fan set, the method further comprises:
and sending a rotating speed control instruction to a fan set, wherein the rotating speed control instruction is used for controlling each fan in the fan set to operate at a target rotating speed.
8. The method of claim 7, prior to sending the speed control command to the group of fans, further comprising:
Monitoring a backpressure value of the fan unit;
determining a target rotating speed according to the backpressure set value of the fan unit and the monitored backpressure value of the fan unit;
and generating the rotating speed control instruction according to the target rotating speed.
9. An air cooling fan temperature field control device, characterized by includes:
the system comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring row fan temperature information of a fan set, the fan set comprises a plurality of fans which are arranged in an array, and the row fan temperature information comprises first temperature values of positions of the fans in the rows in the fan set;
the first control module is used for sending corresponding first control instructions to the rows of fans according to the temperature information of the rows of fans and controlling the temperature of the positions of the rows of fans in the fan group to a first target temperature value, and the first target temperature value is determined according to the first temperature value;
the second acquisition module is used for acquiring the temperature information of each fan of the fan set controlled by the first control instruction, wherein the temperature information of each fan comprises a second temperature value of the position of each fan in the fan set;
and the second control module is used for sending corresponding second control instructions to the fans according to the temperature information of the fans, and controlling the temperature of the position of each fan in the fan set to a second target temperature value, wherein the second target temperature value is determined according to the second temperature value, and the first control instructions and the second control instructions are used for controlling the fan rotating speed of the fan set.
10. The utility model provides an air cooling fan temperature field control system which characterized in that includes:
the air-cooled fan temperature field control apparatus of claim 9;
and the plurality of fans are connected with the air cooling fan temperature field control device in a communication manner and are arranged in an array manner.
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| CN114383735B (en) * | 2021-12-17 | 2024-03-26 | 暨南大学 | Thermal power generating unit air cooling array temperature field monitoring method and device based on machine vision |
| CN115929668A (en) * | 2022-09-16 | 2023-04-07 | 上海电气斯必克工程技术有限公司 | Method for compensating ambient wind and tube bundle temperature by rotating speed of direct air cooling fan |
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