Cooling tower filling method based on temperature field and aerodynamic field

Abstract

The invention discloses a cooling tower filling method based on a temperature field and an aerodynamic field, and relates to the technical field of cooling towers, a vertical axis of a cooling tower is taken as a center, the cooling tower is divided into two annular areas with different radiuses, namely a conventional area and a thick area, and the filling thickness of the thick area is greater than that of the conventional area; the thick area comprises a plurality of fan-shaped areas, each fan-shaped area is composed of a windward area, a leeward area and a radiation area, and the filler thickness of each windward area is larger than that of each leeward area and that of each radiation area. The windward area, the leeward area, the radiation area and the like are arranged, the wind direction of prevailing wind and the average wind speed are brought into layout parameters of the filler based on an aerodynamic field according to different geographical environments, coupling of an external wind field is improved, and the filler thickness and width ratio of the thick area to the conventional area is calculated according to the average wind speed; and the cooling efficiency can be improved by 10-15% in a strong wind area.

Description

Technical Field

[0001] The invention relates to the technical field of cooling towers, and in particular to a cooling tower filling method based on a temperature field and an aerodynamic field. Background Art

[0002] Cooling towers are important cold-end equipment in power plants, and their working performance has a great impact on the operating efficiency of the units. The most common type of cooling tower in my country's power generation units is the natural ventilation countercurrent wet cooling tower. The cooling capacity of the packing area of ​​this type of cooling tower accounts for 60% to 70% of the entire tower, and it is an important area for the cooling tower to exert its cooling capacity.

[0003] At present, domestic cooling tower fillers usually adopt a relatively simple uniform arrangement. This method cannot fully utilize the cooling capacity of the filler area. The use of appropriate non-equal height settings for the filler area can improve the working performance of the cooling tower to a certain extent.

[0004] The Chinese patent application number CN201910961595.X discloses a cooling tower packing layout optimization method based on cooling potential. In order to optimize the cooling efficiency of the cooling tower, the invention obtains the distribution and changes of parameters such as air velocity, density and water temperature in the tower based on the three-dimensional calculation results of the cooling performance of the cooling tower. Based on the radial distribution law of the cooling potential of the air, the non-uniform arrangement area of ​​the packing is divided into three parts, and the packing thickness is increased in the part with high cooling efficiency, and the packing thickness is reduced in the part with low efficiency. However, the invention does not consider the influence of the external wind field, and only analyzes the air flow in the tower as a design parameter. In strong wind or variable wind areas, the external wind will interfere with the natural ventilation airflow in the tower, causing the cooling potential distribution of the packing area to deviate from expectations.

[0005] At the same time, in order to avoid "through wind" caused by strong side winds, most existing cooling towers have partial wind shields at the bottom of the cooling tower, located on the windward or leeward side. However, this method mainly reduces the wind speed of strong side winds entering the tower, making the wind speed of the side wind a key variable affecting the cooling efficiency of the cooling tower, and does not guide the wind to adapt to the filler thickness in different areas.

[0006] To this end, the present invention proposes a cooling tower filling method based on temperature field and aerodynamic field to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a cooling tower filling method based on temperature field and aerodynamic field to solve the technical problems mentioned in the above background technology that the existing cooling tower does not consider the influence of the external wind field and does not guide the side wind.

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cooling tower filling method based on temperature field and aerodynamic field, according to the different wind directions of "prevailing wind" around the cooling tower in different geographical locations, to achieve non-equal height setting of the filling, with the vertical axis of the cooling tower as the center, outwardly divided into two annular areas with different radii, namely, a conventional area and a thick area, the filling thickness of the thick area is greater than the filling thickness of the conventional area;

[0009] The thick area includes a plurality of fan-shaped areas, each fan-shaped area is composed of a windward area, a leeward area and a radiation area, and the filler thickness of the windward area is greater than the filler thickness of the leeward area and the radiation area;

[0010] δ w =δ0×[1+a(v / v c ) β ]

[0011] Among them, δw is the effective thickness of the fill in the windward area, V is the average wind speed of the prevailing wind, δ0 is the fill thickness of the conventional area 11, Vc is the critical wind speed threshold, α is the wind pressure correction coefficient, and β is the nonlinear index.

[0012] Preferably, the wind pressure correction coefficient α is 0.15-0.35, which is positively correlated with the tower body diameter; the nonlinear index β is 1.2-1.8, which is positively correlated with the porosity of the filler.

[0013] Preferably, the diameter ratio of the thick area to the conventional area is:

[0014]

[0015] Among them, D 厚 Total diameter including thick area and regular area, D 常规 is the inner diameter of the conventional area, k is the diameter correction coefficient, Vc is the critical wind speed threshold, and γ is the nonlinear index;

[0016] The diameter correction coefficient k is 0.08 to 0.25 and is negatively correlated with the tower height and the filler porosity;

[0017] The nonlinear index γ has a value of 0.8 to 1.2, is negatively correlated with wind speed uniformity, and takes a high value when wind speed uniformity is poor.

[0018] Preferably, a flow splitter assembly is provided below the filler, the flow splitter assembly includes a plurality of wind boxes located below the thick area, the wind boxes include a windward box located at the windward area and a leeward box located at the leeward area, an intermediate box is provided below the conventional area, and both upper and lower sides of the intermediate box and the wind box are hollow structures, a cluster pipe connected to the wind box is provided on the side wall of the wind box, the cluster pipe is connected to the intermediate box through a pipeline, and a temperature sensor and a wind speed sensor are provided in each of the plurality of wind boxes;

[0019] The middle box is provided with an air suction piece, and when the air volume in the windward box is greater than the air volume in the leeward box, the air suction piece can suck the air in the windward box into the leeward box.

[0020] Preferably, the air exhaust member includes two air collecting hoods symmetrically arranged in the middle box, an air duct is arranged between the two air collecting hoods, and a first fan is arranged on the air duct. The first fan can draw the air in the windward box into the leeward box.

[0021] Preferably, ventilation holes matching the wind box are provided on the side wall of the intermediate box, and a plurality of flow regulating components matching the ventilation holes are arranged on the inner wall of the intermediate box, and the plurality of flow regulating components can respectively adjust the flow of each ventilation hole.

[0022] Preferably, the flow regulating assembly includes a mounting block fixedly mounted on the inner wall of the middle box, the mounting block is provided with an electromagnet, one side of the mounting block is slidably connected with a wind shield matching the ventilation hole, a magnetic plate is provided on the side of the wind shield close to the electromagnet, one side of the magnetic plate is fixedly connected with a guide rod passing through the mounting block, and an elastic member is provided between the magnetic plate and the mounting block.

[0023] Preferably, a temperature sensor is provided inside the middle box, and wind tubes connected to the air duct are provided on both sides of the air duct respectively. The wind tube is a cylindrical structure opened on one side, and a plurality of air outlet holes are provided on the side wall of the wind tube. A switching mechanism is provided inside the air duct, and the switching mechanism can pass the wind in the air duct into the wind tube.

[0024] Preferably, the switching mechanism includes a rotating drum, a through hole matching the air duct is opened on the side wall of the rotating drum, a motor is installed on the side wall of the air duct, a transmission gear is coaxially fixed to the output end of the motor, a notch is opened on the side wall of the air duct, and an annular tooth groove matching the transmission gear is opened on the side wall of the rotating drum.

[0025] Preferably, a second fan is provided on the air duct, and the second fan can draw the wind in the leeward box into the middle box.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention incorporates the prevailing wind direction and average wind speed into the layout parameters of the filler based on the aerodynamic field and different geographical environments through the settings of the windward area, the leeward area and the radiation area, thereby improving the coupling of the external wind field, and calculating the filler thickness and width ratio between the thick area and the conventional area based on the average wind speed, which can improve the cooling efficiency by 10-15% in the strong wind area.

[0028] 2. The present invention is provided with a diverter component, a flow regulating component and a first fan. When the air volume in the windward area is obviously greater than that in the leeward area, the first fan starts to pump the wind in the windward area into the leeward area. At the same time, the flow regulating component controls the cross-sectional area of ​​the ventilation holes through the air volume of different bellows fed back by the sensor, thereby adjusting the air volume of each windward box, balancing the cooling efficiency of the windward area and the leeward area, and making effective use of the filler in the leeward area.

[0029] 3. The present invention is configured with a wind duct, a switching component, a second fan, etc., based on the influence of the temperature field. When the temperature of the conventional zone is significantly higher than the predetermined cooling value or higher than the temperature of the thick zone, the motor drives the drum to rotate, so that the wind duct is connected to the air guide duct. According to the air volume in the windward zone and the leeward zone, the first fan or the two fans are controlled to start at the same time to draw the ambient air in the thick zone or the windward zone to the conventional zone, so as to balance the cooling efficiency of the thick zone and the conventional zone, and avoid the conventional zone temperature being too high and affecting the overall cooling efficiency of the cooling tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The figure is a schematic diagram of the overall structure of a cooling tower filling method based on temperature field and aerodynamic field of the present invention.

[0031] Figure 2 It is a fan-shaped schematic diagram of the windward area and the leeward area of ​​the present invention.

[0032] Figure 3 It is a fan-shaped schematic diagram of the width of the windward area and the leeward area of ​​the present invention.

[0033] Figure 4 It is a schematic plan view of the diversion component of the present invention.

[0034] Figure 5 It is a schematic diagram of the cooperation between the exhaust member and the middle box of the present invention.

[0035] Figure 6 It is a schematic diagram of the three-dimensional structure of the air exhaust member of the present invention.

[0036] Figure 7 It is a schematic diagram of the three-dimensional structure of the middle box of the present invention.

[0037] Figure 8 for Figure 7 A schematic diagram of the enlarged structure at point A in the middle.

[0038] Fig. 9 It is a schematic diagram of the matching structure of the air guide pipe and the air duct of the present invention.

[0039] Fig.10 It is a schematic structural diagram of the air duct and the air outlet of the present invention.

[0040] Fig.11It is a schematic diagram of the coordination between the switching assembly and the air duct of the present invention.

[0041] Fig.12 It is a schematic plan cross-sectional view of the switching assembly of the present invention.

[0042] Fig.13 It is a schematic diagram of the three-dimensional structure of the rotating drum of the present invention.

[0043] The accompanying drawings are marked as follows:

[0044] 1. Cooling tower; 11. Conventional area; 12. Thick area; 121. Windward area; 122. Leeward area; 123. Radiant area;

[0045] 2. flow distribution assembly; 21. wind box; 211. windward box; 212. leeward box; 22. middle box; 221. ventilation hole; 23. cluster pipe;

[0046] 3. air extraction member; 31. air collecting cover; 32. air guide duct; 321. air cylinder; 322. air outlet; 33. first fan;

[0047] 4. Flow regulating assembly; 41. Mounting block; 42. Electromagnet; 43. Wind deflector; 44. Magnetic plate; 45. Guide rod; 46. Elastic member;

[0048] 5. Switching mechanism; 51. Rotating drum; 511. Through hole; 52. Motor; 53. Transmission gear; 54. Notch; 55. Annular tooth groove;

[0049] 6. Second fan. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0051] Example 1

[0052] At present, domestic cooling tower packing usually adopts a relatively simple uniform arrangement, which cannot fully utilize the cooling capacity of the packing area. In order to optimize the cooling efficiency of the cooling tower, some users, in the design, obtain the distribution and changes of parameters such as air velocity, density and water temperature in the tower based on the three-dimensional calculation results of the cooling performance of the cooling tower, and divide the non-uniform arrangement area of ​​the packing into three parts, increase the packing thickness in the part with high cooling efficiency, and reduce the packing thickness in the part with low efficiency. However, the influence of the external wind field is not considered, and only the air flow in the tower is analyzed as a design parameter. In strong wind or variable wind areas, the external wind will interfere with the natural ventilation airflow in the tower, causing the cooling potential distribution of the packing area to deviate from expectations. This embodiment is specially invented to solve the above problems.

[0053] See also Figures 1 to 13 As shown, a cooling tower filling method based on temperature field and aerodynamic field according to an embodiment of the present invention realizes non-equal height setting of the filler according to the different wind directions of "prevailing wind" around the cooling tower 1 at different geographical locations. Specifically, with the vertical axis of the cooling tower 1 as the center, it is divided outward in sequence into two annular areas with different radii, namely a conventional area 11 and a thick area 12, and the filler thickness of the thick area 12 is greater than the filler thickness of the conventional area 11.

[0054] See also Figure 2 and Figure 3 As shown, the thick area 12 includes a plurality of fan-shaped areas, which are composed of a windward area 121 , a leeward area 122 and a radiation area 123 . The filler thickness of the windward area 121 is greater than the filler thickness of the leeward area 122 and the radiation area 123 .

[0055] The relationship between the effective thickness of the 121 filler in the windward area and the average wind speed of the prevailing wind is expressed as follows:

[0056] δ w =δ0×[1+a(v / v c ) β ]

[0057] Wherein, δw is the effective thickness of the filler in the windward area 121, V is the average wind speed of the prevailing wind, δ0 is the filler thickness in the conventional area, Vc is the critical wind speed threshold, α is the wind pressure correction coefficient, and β is the nonlinear index.

[0058] The wind pressure correction coefficient α is 0.15-0.35, which is positively correlated with the tower diameter. The larger the tower diameter, the larger the α value. The nonlinear index β is 1.2-1.8, which is positively correlated with the porosity of the filler. The larger the porosity of the filler, the higher the β value.

[0059] The diameter ratio of the thick area 12 to the conventional area 11 is:

[0060]

[0061] Among them, D 厚 The total diameter including the thick area 12 and the conventional area 11, D 常规 is the inner diameter of the conventional zone 11, k is the diameter correction coefficient, Vc is the critical wind speed threshold, and γ is the nonlinear index;

[0062] The diameter correction coefficient k is 0.08 to 0.25, which is negatively correlated with the tower height and the filler porosity;

[0063] The nonlinear index γ ranges from 0.8 to 1.2, is negatively correlated with wind speed uniformity, and takes a high value when wind speed uniformity is poor.

[0064] It should be noted that the above-mentioned critical wind speed threshold Vc refers to the critical speed at which the side wind has a structural impact on the airflow inside the cooling tower. When the wind speed exceeds this threshold, the air flow in the tower changes from orderly flow to turbulent flow. The conventional critical wind speed threshold Vc is 4.0~4.8m / s.

[0065] At the same time, since the wind speed on the windward side is higher, the thickness and width of the windward side should be greater than the width of the leeward side. Under normal environmental conditions, it is more conducive to the cooling efficiency of the cooling tower.

[0066] In this embodiment, W 迎风 =1.5~2W 背风 , that is, the filler width in the windward area 121 is 1.5 to 2 times the filler width in the leeward area 122 .

[0067] When installing fillers on the cooling tower 1, firstly, the wind speed in various directions around the cooling tower 1 is measured, including at least eight basic directions, namely east, south, west, north, southeast, southwest, northwest and northeast, or the prevailing wind direction and wind speed range of the area are checked in combination with the wind rose diagram of the local meteorological bureau and the meteorological data of at least 10 years. The fillers are divided into a windward area 121, a leeward area 122 and two radiation areas 123 according to the above method. For example, if a place often blows northeast winds with an average annual wind speed of 4m / s, then the northeast side of the cooling tower 1 is the windward area 121. Then, the proportional relationship between the filler thickness of the thick area 12 and the conventional area 11 is calculated according to the average annual wind speed, and the filler width of the windward area 121 is appropriately increased. The greater the average wind speed, the wider the filler width of the windward area 121.

[0068] It should be noted that the area of ​​the radiation zone 123 may be 0. If the diameter of the cooling tower 1 is small or the crosswind width in the area is much larger than the diameter of the cooling tower 1 , the area of ​​the radiation zone 123 is 0.

[0069] In summary, by setting up the windward zone 121, the leeward zone 122 and the radiation zone 123, based on the aerodynamic field and according to different geographical environments, the wind direction and average wind speed of the prevailing wind are incorporated into the layout parameters of the filler to improve the coupling of the external wind field, and the filler thickness and width ratio of the thick zone 12 and the conventional zone 11 are calculated according to the average wind speed, which can improve the cooling efficiency by 10-15% in strong wind areas.

[0070] Example 2

[0071] In actual use, it is found that in order to avoid "drafts" caused by strong side winds, most existing cooling towers have partial wind shields at the bottom of the cooling tower, located on the windward or leeward side. However, this method mainly reduces the wind speed of strong side winds entering the tower, making the wind speed of the side wind a key variable affecting the cooling efficiency of the cooling tower, and does not guide the wind to adapt to the filler thickness in different areas. Further improvements are made on the basis of the above embodiments.

[0072] See also Figures 4 to 7 As shown, a diversion component 2 is arranged below the filler, and the diversion component 2 includes a plurality of bellows 21 located below the thick area 12, and the bellows 21 include a windward box 211 located at the windward area 121 and a leeward box 212 located at the leeward area 122. An intermediate box 22 is arranged below the conventional area 11, and the upper and lower sides of the intermediate box 22 and the bellows 21 are both hollow structures, and a cluster pipe 23 connected to the bellows 21 is arranged on the side wall of the bellows 21, and the cluster pipe 23 is connected to the intermediate box 22 by a pipeline, and temperature sensors and wind speed sensors are arranged in the plurality of bellows 21.

[0073] An air suction piece 3 is provided in the middle box 22 . When the air volume in the windward box 211 is greater than the air volume in the leeward box 212 , the air suction piece 3 can suck the air in the windward box 211 into the leeward box 212 .

[0074] The air exhaust member 3 includes two air collecting hoods 31 symmetrically arranged in the middle box 22 , an air duct 32 is arranged between the two air collecting hoods 31 , and a first fan 33 is arranged on the air duct 32 . The first fan 33 can extract the wind in the windward box 211 to the leeward box 212 .

[0075] See also Figure 7 and Figure 8 As shown, ventilation holes 221 matching the wind box 21 are opened on the side wall of the middle box 22, and multiple flow regulating components 4 matching the ventilation holes 221 are arranged on the inner wall of the middle box 22. The multiple flow regulating components 4 can adjust the flow of each ventilation hole 221 respectively.

[0076] The flow regulating component 4 includes a mounting block 41 fixedly mounted on the inner wall of the intermediate box 22, an electromagnet 42 is mounted on the mounting block 41, a wind shield 43 matching the ventilation hole 221 is slidably connected to one side of the mounting block 41, a magnetic plate 44 is mounted on the side of the wind shield 43 close to the electromagnet 42, a guide rod 45 penetrating the mounting block 41 is fixedly connected to one side of the magnetic plate 44, and an elastic member 46 is mounted between the magnetic plate 44 and the mounting block 41.

[0077] During use, the windward box 211, the leeward box 212 and the middle box 22 are respectively installed under the fillers of the windward area 121, the leeward area 122 and the conventional area 11. The temperature sensor in the wind box 21 monitors the temperature in the wind box 21 in real time, or the wind speed sensor monitors the air volume in each wind box 21 in real time. When the temperature in the windward box 211 is significantly lower than the temperature in the leeward box 212, it means that the gas flow in the windward box 211 is large, and the first fan 33 is started to pump the wind in the windward box 211 into the leeward box 212, so that the air volume on both sides of the cooling tower 1 is balanced.

[0078] At the same time, according to the air volume in different windward boxes 211, the flow regulating component 4 can adjust the cross-sectional area of ​​each ventilation hole 221. For example, if the number of windward boxes 211 is 3, namely the first windward box 211, the second windward box 211 and the third windward box 211, when the air volume in the three windward boxes 211 is greater than the air volume in the leeward box 212, but the air volume in the first windward box 211 is the largest, and the air volume in the third windward box 211 is the smallest, the corresponding current of the electromagnet 42 is positively correlated therewith, that is, the greater the air volume, the greater the adsorption force of the electromagnet 42 on the magnetic attraction plate 44, and the greater the flow rate of the ventilation hole 221.

[0079] Through the settings of the diverter component 2, the flow regulating component 4 and the first fan 33, when the air volume in the windward area 121 is significantly greater than the air volume in the leeward area 122, the first fan 33 starts to pump the wind in the windward area 121 into the leeward area 122. At the same time, the flow regulating component 4 controls the cross-sectional area of ​​the ventilation hole 221 through the air volume of different wind boxes 21 fed back by the sensor, so as to adjust the air volume of each windward box 211, balance the cooling efficiency of the windward area 121 and the leeward area 122, and make the filler in the leeward area 122 can also be effectively utilized.

[0080] Example 3

[0081] Considering that the packing thickness of the inner ring conventional zone 11 is the thinnest and the cooling efficiency is the lowest, when a large amount of ambient wind passes through the thick zone 12 and ignores the conventional zone 11, the temperature in the conventional zone 11 will increase significantly, thereby reducing the overall cooling efficiency of the cooling tower 1. In view of the above problems, further improvements are made on the basis of the above embodiments.

[0082] See also Figures 9 to 13As shown, wind tubes 321 connected to the air duct 32 are respectively provided on both sides of the air duct 32. The wind tube 321 is a cylindrical structure with a single-side opening. A plurality of air outlet holes 322 are provided on the side wall of the wind tube 321. A switching mechanism 5 is provided inside the air duct 32. The switching mechanism 5 can pass the wind in the air duct 32 into the wind tube 321.

[0083] The switching mechanism 5 includes a rotating drum 51, a through hole 511 matching the wind tube 321 is opened on the side wall of the rotating drum 51, a motor 52 is installed on the side wall of the air duct 32, a transmission gear 53 is coaxially fixed to the output end of the motor 52, a notch 54 is opened on the side wall of the air duct 32, and an annular tooth groove 55 matching the transmission gear 53 is opened on the side wall of the rotating drum 51.

[0084] The air duct 32 is provided with a second fan 6 , which can pump the wind in the leeward box 212 into the middle box 22 .

[0085] On the basis of the above embodiment, when in use, if the temperature in the middle box 22 obviously exceeds the temperature of the thick zone 12, the switching component, the first fan 33 and the second fan 6 are started respectively, and the motor 52 in the switching component drives the rotating drum 51 to rotate 90 degrees, and the wind cylinder 321 is connected to the air duct 32. Under the rotation of the first fan 33 and the second fan 6, the ambient wind in the thick zone 12 will be drawn into the conventional zone 11. After the temperature drops, the motor 52 drives the rotating drum 51 to reset.

[0086] In order to avoid frequent starting of the motor 52 and affecting the cooling efficiency of the thick zone 12, when the windward zone 121 is subject to a large side wind and the leeward zone 122 is at a normal air volume, it is only necessary to control the motor 52 and the first fan 33 to start, and the flow regulating component 4 corresponding to the leeward zone 122 is closed to separate the leeward zone 122 from the normal zone 11. Then the first fan 33 will draw the ambient wind of the windward zone 121 into the normal zone 11, and the rotation speed of the first fan 33 can also be controlled to avoid excessive rotation speed affecting the temperature of the windward zone 121.

[0087] To summarize, through the settings of the wind tube 321, the switching component and the second fan 6, based on the influence of the temperature field, when the temperature of the conventional zone 11 is significantly higher than the predetermined cooling value or higher than the temperature of the thick zone 12, the motor 52 drives the rotating drum 51 to rotate, so that the wind tube 321 is connected to the air guide duct 32, and according to the air volume in the windward zone 121 and the leeward zone 122, the first fan 33 or the two fans are controlled to start at the same time, and the ambient wind in the thick zone 12 or the windward zone 121 is pumped to the conventional zone 11, so as to balance the cooling efficiency of the thick zone 12 and the conventional zone 11, and avoid the conventional zone 11 The temperature is too high and affects the overall cooling efficiency of the cooling tower 1.

[0088] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cooling tower filling method based on temperature field and aerodynamic field, characterized in that: According to the different wind directions of the "prevailing wind" around the cooling tower (1) at different geographical locations, the filler is arranged at non-uniform heights, and the vertical axis of the cooling tower (1) is taken as the center and is sequentially divided outward into two annular areas with different radii, namely a conventional area (11) and a thick area (12), wherein the filler thickness of the thick area (12) is greater than the filler thickness of the conventional area (11); The thick area (12) includes a plurality of fan-shaped areas, wherein the fan-shaped areas are composed of a windward area (121), a leeward area (122), and a radiation area (123), and the filler thickness of the windward area (121) is greater than the filler thickness of the leeward area (122) and the radiation area (123); d w =δ0×[1+α(v / v c ) β ] Wherein, δw is the effective thickness of the filler in the windward area (121), V is the average wind speed of the prevailing wind, δ0 is the filler thickness in the conventional area (11), Vc is the critical wind speed threshold, α is the wind pressure correction coefficient, and β is the nonlinear index.

2. A cooling tower filling method based on temperature field and aerodynamic field according to claim 1, characterized in that: The wind pressure correction coefficient α is 0.15-0.35, which is positively correlated with the tower body diameter; the nonlinear index β is 1.2-1.8, which is positively correlated with the porosity of the filler.

3. A cooling tower filling method based on temperature field and aerodynamic field according to claim 2, characterized in that: The diameter ratio of the thick area (12) to the conventional area (11) is: Among them, D 厚 The total diameter including the thick area (12) and the conventional area (11), D 常规 is the inner diameter of the conventional zone (11), k is the diameter correction coefficient, Vc is the critical wind speed threshold, and γ is the nonlinear index; The diameter correction coefficient k is 0.08 to 0.25 and is negatively correlated with the tower height and the filler porosity; The nonlinear index γ has a value of 0.8 to 1.2, is negatively correlated with wind speed uniformity, and takes a high value when wind speed uniformity is poor.

4. A cooling tower filling method based on temperature field and aerodynamic field according to claim 3, characterized in that: A flow splitter assembly (2) is arranged below the filler, the flow splitter assembly (2) comprising a plurality of wind boxes (21) located below the thick area (12), the wind boxes (21) comprising a windward box (211) located at the windward area (121) and a leeward box (212) located at the leeward area (122), an intermediate box (22) is arranged below the conventional area (11), and both upper and lower sides of the intermediate box (22) and the wind box (21) are hollow structures, a cluster pipe (23) in communication with the wind box (21) is arranged on the side wall of the wind box (21), the cluster pipe (23) and the intermediate box (22) are connected via a pipeline, and a temperature sensor and a wind speed sensor are arranged in each of the plurality of wind boxes (21); An air suction member (3) is provided in the middle box (22). When the air volume in the windward box (211) is greater than the air volume in the leeward box (212), the air suction member (3) can suck the air in the windward box (211) into the leeward box (212).

5. A cooling tower filling method based on temperature field and aerodynamic field according to claim 4, characterized in that: The air extraction member (3) comprises two air collecting hoods (31) symmetrically arranged in the middle box (22); an air guide duct (32) is arranged between the two air collecting hoods (31); a first fan (33) is arranged on the air guide duct (32); and the first fan (33) can extract the air in the windward box (211) into the leeward box (212).

6. A cooling tower filling method based on temperature field and aerodynamic field according to claim 5, characterized in that: A ventilation hole (221) matching the wind box (21) is provided on the side wall of the intermediate box (22), and a plurality of flow regulating components (4) matching the ventilation holes (221) are provided on the inner wall of the intermediate box (22), wherein the plurality of flow regulating components (4) can respectively regulate the flow of each ventilation hole (221).

7. A cooling tower filling method based on temperature field and aerodynamic field according to claim 6, characterized in that: The flow regulating assembly (4) comprises a mounting block (41) fixedly mounted on the inner wall of the intermediate box (22); an electromagnet (42) is mounted on the mounting block (41); a windshield (43) matching the ventilation hole (221) is slidably connected to one side of the mounting block (41); a magnetic attraction plate (44) is mounted on the side of the windshield (43) close to the electromagnet (42); a guide rod (45) penetrating the mounting block (41) is fixedly connected to one side of the magnetic attraction plate (44); and an elastic member (46) is mounted between the magnetic attraction plate (44) and the mounting block (41).

8. A cooling tower filling method based on temperature field and aerodynamic field according to claim 7, characterized in that: A temperature sensor is arranged inside the intermediate box (22); wind tubes (321) connected to the wind tube (32) are arranged on both sides of the wind tube (32); the wind tube (321) is a cylindrical structure with a single-side opening; a plurality of air outlet holes (322) are arranged on the side wall of the wind tube (321); a switching mechanism (5) is arranged inside the wind tube (32); and the switching mechanism (5) can pass the wind in the wind tube (32) into the wind tube (321).

9. A cooling tower filling method based on temperature field and aerodynamic field according to claim 8, characterized in that: The switching mechanism (5) comprises a rotating drum (51), a through hole (511) matching with the air cylinder (321) is provided on the side wall of the rotating drum (51), a motor (52) is mounted on the side wall of the air guide pipe (32), a transmission gear (53) is coaxially fixed to the output end of the motor (52), a notch (54) is provided on the side wall of the air guide pipe (32), and an annular tooth groove (55) matching with the transmission gear (53) is provided on the side wall of the rotating drum (51).

10. A cooling tower filling method based on temperature field and aerodynamic field according to claim 9, characterized in that: The air guide duct (32) is provided with a second fan (6), and the second fan (6) can pump the wind in the leeward box (212) into the middle box (22).

Images