CN114234674B - Water film cooling strengthening device and method for air cooler - Google Patents
Water film cooling strengthening device and method for air cooler Download PDFInfo
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- CN114234674B CN114234674B CN202111383936.3A CN202111383936A CN114234674B CN 114234674 B CN114234674 B CN 114234674B CN 202111383936 A CN202111383936 A CN 202111383936A CN 114234674 B CN114234674 B CN 114234674B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 162
- 238000000034 method Methods 0.000 title claims abstract description 83
- 238000001816 cooling Methods 0.000 title claims abstract description 45
- 238000005728 strengthening Methods 0.000 title claims abstract description 24
- 238000009834 vaporization Methods 0.000 claims abstract description 37
- 230000008016 vaporization Effects 0.000 claims abstract description 37
- 230000001939 inductive effect Effects 0.000 claims abstract description 3
- 238000009826 distribution Methods 0.000 claims description 24
- 239000007788 liquid Substances 0.000 claims description 10
- 238000000889 atomisation Methods 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000005484 gravity Effects 0.000 abstract description 4
- 230000005660 hydrophilic surface Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000001976 improved effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000008234 soft water Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000009692 water atomization Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D5/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation
- F28D5/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, using the cooling effect of natural or forced evaporation in which the evaporating medium flows in a continuous film or trickles freely over the conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/04—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by preventing the formation of continuous films of condensate on heat-exchange surfaces, e.g. by promoting droplet formation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
- F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
- F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a water film cooling strengthening device and a method of an air cooler, wherein the device comprises a tube bundle, a hanging template, a water tank, an atomizer and an airflow guide plate; the tube bundles are obliquely arranged above the water tank; the hanging templates are arranged in parallel and at intervals, and the tube bundles penetrate through the hanging templates; an atomizer is arranged in the water tank; the air flow guide plate is arranged between the tube bundle, the hanging template and the water tank; an air inducing device is arranged above the air cooler. The device realizes water film cooling strengthening on the basis of a closed air cooler, wherein the water film cooling strengthening process is to adopt atomized water drops to reach the surface of a hanging template, and the water drops are trapped by the hanging template and quickly spread to generate a thin water film under the actions of self gravity, air flow, special hanging template shape and hydrophilic surface; the method greatly promotes the vaporization efficiency of the water film and the direct heat exchange on the heat exchange surface, realizes the high-efficiency cooling with low water consumption, and has the characteristics of simple structure, lower cost and the like.
Description
Technical Field
The invention relates to a cooling device, in particular to a water film cooling strengthening device and method of an air cooler.
Background
The air cooler is an air cooler for short, and is a heat exchange device which is used most for condensation and cooling in petrochemical industry, heating ventilation air conditioning and oil gas processing production. The air cooler has very wide application in industrial circulating cooling water, and the air cooler is divided into an open type air cooler and a closed type air cooler according to whether the circulating cooling water is in contact with the atmosphere or not. The open air cooler mainly absorbs heat through the evaporation of circulating cooling water, then the air brings the heat out to realize the purpose of cooling, the evaporation loss of the circulating water is larger and is about 1-2% of the circulating water, and meanwhile, the evaporation leads to the concentration of the circulating water, the water quality is poor, and the sewage water loss is large.
The air cooler of the closed air cooler generally comprises a cooled medium channel-tube bundle, a tube box, a fan, a framework and other main parts; circulating water is circulated in sealed heat exchange, indirect heat exchange is carried out between the cooling medium channel and air through heat exchange, direct evaporation of the circulating water is avoided, and water loss is greatly reduced. However, the current closed air cooler mainly relies on spray water for sensible heat exchange, the utilization rate of the latent heat is low, and the heat exchange efficiency is generally poor.
Disclosure of Invention
The invention aims to solve the technical problem of providing the water film cooling strengthening device of the air cooler, which has good heat dissipation and cooling effects; the invention also provides a water film cooling strengthening method of the air cooler.
In order to solve the technical problems, the technical scheme adopted by the device is as follows: the device comprises a tube bundle, a hanging template, a water pool, an atomizer and an airflow guide plate; the tube bundles are obliquely arranged above the water tank; the hanging templates are arranged in parallel and at intervals, and the tube bundles penetrate through the hanging templates; an atomizer is arranged in the water tank; the air flow guide plate is arranged between the tube bundle, the hanging template and the water tank; an air inducing device is arranged above the air cooler.
The included angle between the tube bundle and the horizontal plane is 20-60 degrees, and the hanging template is perpendicular to the tube bundle.
The film-hanging plate is a corrugated plate, and the inner angle of the corrugated plate is 150-180 degrees.
The film-hanging plate of the device is coated with a hydrophilic coating.
The distance between the adjacent hanging templates of the device is 3-5 mm.
The air flow guide plate of the device adopts a shutter type air flow guide structure.
The method of the invention adopts the device and is characterized in that the method comprises the following steps: and (I) atomizing: in the cooling process of the air cooler, an atomizer is opened to atomize water in a water tank into liquid drops;
(II) film distribution process: under the action of induced air flow generated by the induced air device, the liquid drops rise and are attached to the hanging template, and a stable water film is formed by spreading on the hanging template;
(III) a water film vaporization process: closing the atomizer, wherein the water film is continuously gasified in the process that the induced air flows through the surface of the water film until the water film state is broken;
and (IV) repeating the atomization process to the water film vaporization process.
In the film distribution process of the method, the flow velocity of induced air flow after passing through the air flow guide plate is 0-1 m/s.
In the water film vaporization process, the flow velocity of induced air flow after passing through the air flow guide plate is 2-4 m/s.
In the atomization process of the method, the atomizer atomizes the liquid into droplets with the diameter of 50 mu m or less.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in: the device realizes water film cooling strengthening on the basis of the closed air cooler, and the water film cooling strengthening process is realized by adopting atomized water drops to reach the surface of the hanging template, rapidly expanding the water film under the action of self gravity and wind power to generate a water film, directly exchanging heat on a heat exchange surface through the vaporization latent heat of the water film, and realizing high-efficiency cooling. The atomizer adopted by the invention has uniform and full atomization, the particle size of liquid drops can reach 50 mu m or less, and the vaporization speed of water is greatly improved. The corrugated film-hanging plate is adopted, so that the heat exchange area is effectively increased, meanwhile, vortex can be formed locally in the film-distributing process, water drops are collided and trapped, the generation of a water film is effectively promoted, the vaporization of the water film is enhanced, and the latent heat is fully utilized. According to the invention, water film arrangement is realized according to a water film vaporization heat and mass transfer theory, the problems of difficult film hanging and poor quality of formed water films are solved, the stability and heat exchange efficiency of the water films are improved, low water consumption and high-efficiency cooling are realized, and the water film vaporization heat and mass transfer device has the characteristics of simple structure, lower cost and the like. According to the device, the hydrophilic coating is coated on the film-hanging plate, so that the contact angle of a water film can be effectively reduced on the hydrophilic surface.
The method of the invention realizes high-efficiency heat dissipation and water resource saving by promoting the quick formation of the water film and vaporization on the surface of the film-hanging plate, and has the characteristics of good cooling effect and high cooling efficiency.
According to the method, the air flow direction and the air flow speed of the heat exchange interface can be controlled through the air flow guide plate, and in the film distribution process stage, the trapping efficiency of the film-hanging plate on water drops can be improved relative to the oblique small air flow of the film-hanging plate, so that the film-hanging plate is beneficial to water film forming; in the water film vaporization stage, the parallel high airflow velocity relative to the film-hanging plate is beneficial to the quick vaporization reaction, and simultaneously, the surface heat is taken away quickly. Realizing high-efficiency film formation and vaporization.
The method of the invention greatly reduces the thickness of the water film by controlling the water atomization form and the air flow speed and direction control of the heat exchange interface, and solves the problems of low vaporization efficiency, high heat transfer resistance and influence on the cooling effect caused by the large thickness of the water film of the traditional shower type wet air cooler.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic elevational view of the present invention;
FIG. 2 is a schematic side view of the film laying process according to the present invention;
FIG. 3 is a schematic side view of the water film vaporization of the present invention;
FIG. 4 is a schematic diagram of a film-forming structure of a film-forming plate in the film-forming process.
In the figure: the cooling device comprises a cooling medium channel, a film hanging plate, a 3-airflow guide, a 4-water tank, a 5-atomizer, 6-atomized water drops and a 7-water film.
Detailed Description
The water film cooling strengthening device of the air cooler comprises a tube bundle, a hanging template 2, a water pool 4, an atomizer 5 and an airflow guide plate 3, as shown in fig. 1, 2 and 3. The tube bundle is composed of cooled medium channels 1; the number of the medium channels 1 to be cooled is several, and the medium channels are arranged in parallel to form a tube bundle; the medium to be cooled is circulated in the medium channel; the water inlet end and the water outlet end of the tube bundle are respectively provided with a temperature detector and a humidity detector for detecting cooling effect. The tube bundle is obliquely arranged above the pool 4; the included angle between the cooled medium channel 1 and the horizontal plane in the tube bundle can be between 20 and 60 degrees. The number of the hanging templates 2 is several, and each cooled medium channel 1 passes through each hanging template 2; the hanging templates 2 are arranged in parallel and at intervals and are perpendicular to the cooled medium channel 1; the distance between the adjacent hanging templates 2 is 3-5 mm, and the thickness of each hanging template 2 is 0.2-0.3 mm; the hanging templates 2 are corrugated plates, and the inner angle alpha of the corrugated plates is 150-180 degrees; the hanging template 2 is made of copper sheets, aluminum sheets or zinc sheets, and is coated with hydrophilic coatings on two sides or one side; the hydrophilic coating has the effects of greatly reducing the contact angle of water, enabling a water film to be spread rapidly to form a thin liquid film, and simultaneously has the characteristics of pollution resistance, corrosion resistance and scaling resistance. The connection mode of the film-hanging plate 2 and the cooled medium channel 1 is expansion joint.
As shown in fig. 1, 2, 3 and 4, an atomizer 5, preferably a pulse atomizer, is disposed in the water tank 4 in the water film cooling strengthening device of the air cooler. An airflow guide plate 3 is arranged below the tube bundle and the hanging template 2; the air flow guide plate 3 is of a plate-shaped structure, is positioned above the water tank 4 and is arranged in parallel with the tube bundles. The air flow guide plate 3 is provided with strip-shaped air flow guide openings penetrating through the plate wall, and the length direction of each air flow guide opening is perpendicular to each cooled medium channel 1; an airflow guide turning plate is rotatably connected to the upper shaft of the airflow guide plate 3 at the airflow guide opening; the airflow guiding turning plate can cover the airflow guiding opening and can be turned upwards by 90 degrees; thus, a shutter-type air flow guiding structure is formed, so that induced air flow passing through the air flow guiding opening can be blown to the tube bundle and the hanging template 2 at an angle of 0-90 degrees. An induced draft device is arranged above the air cooler and used for generating induced draft air flow; the induced air flow passes through the upper part of the water tank 4, the air flow guide plate 3, the tube bundle and the hanging template 2 from bottom to top, the angle of the induced air flow sprayed to the hanging template 2 is adjusted by adjusting the angle of the air flow guide turning plate on the air flow guide plate 3, and a water film or a vaporization water film is formed on the hanging template 2 by controlling the flow rate of the induced air flow.
The water film cooling strengthening method of the air cooler adopts the following processes: and (I) atomizing: in the cooling process of the air cooler, the atomizer 5 is turned on, and the water in the water tank is rapidly atomized into droplets of 50 μm or less.
(II) film distribution process: under the action of induced air flow generated by the induced air device, the liquid drops rise and enter the gap of the film hanging plate; simultaneously, the opening and closing angles of the airflow guiding turning plates of the airflow guiding plates 3 are regulated, the flow speed of induced air flow passing through the airflow guiding plates 3 is reduced to 0-1 m/s, and the induced air flow direction is guided to form a certain angle with the film hanging plate 2, so that water mist droplets are trapped and attached by the film hanging plate 2, and the water mist droplets are rapidly spread to form a stable thin water film under the action of a coating; the water film realizes balance and stable adhesion under the combined action of air flow resistance, self gravity, interfacial tension, interfacial friction and the like; the low wind speed is beneficial to liquid drop trapping and water film forming. The included angle between the induced air flow and the film hanging plate can be adjusted within the range of 0-90 degrees.
(III) water film vaporization: closing the atomizer 5, and adjusting the airflow guiding turning plate of the airflow guiding plate 3 to be in a fully opened state or a proper opened state to enable the flow speed of induced air to be 2-4 m/s, wherein the airflow direction is basically parallel to the film hanging plate 2; in the process that the induced draft airflow flows through the surface of the water film, the water film is continuously gasified until the water film state is broken; the high wind speed is favorable for the rapid vaporization and heat transfer of the water film and improves the heat exchange efficiency. The included angle between the induced air flow and the film hanging plate can be adjusted within the range of 0-90 degrees.
And (IV) repeating the atomization process to the water film vaporization process. The time of the film distribution process and the time required by the vaporization of the water film are different according to the cooling load of the cooled medium, and the test determines that the general time length is the film distribution process, namely the vaporization of the water film=1 (3-5). The atomized water source adopts soft water or desalted water, so that scaling on the heat exchange surface and the like can be prevented.
Example 1: the water film cooling strengthening method of the air cooler adopts the following specific process.
Adjusting the included angle between the whole cooled medium channel 1 and the horizontal plane to be 30 degrees, wherein the wind speeds of a film distribution process and a water film vaporization process are respectively 0.5m/s and 2m/s, and the water film vaporization time ratio of the film distribution process to the water film vaporization time is 1:3 and the ripple inner angle is 160 degrees; meanwhile, a conventional horizontal type light pipe air cooler is arranged as a comparison, the air quantity, the water distribution quantity, the water inflow quantity and the water temperature are kept consistent with the system, and meanwhile, the temperatures of a water inlet and a water outlet detector are recorded and are shown in a table 1.
Example 2: the water film cooling strengthening method of the air cooler adopts the following specific process.
Adjusting the included angle between the whole cooled medium channel and the horizontal plane to be 45 degrees, wherein the wind speeds of a film distribution process and a water film vaporization process are respectively 0.5m/s and 2m/s, and the water film vaporization time ratio in the film distribution process is 1:3, and the ripple inner angle is 160 degrees; meanwhile, a conventional horizontal type light pipe air cooler is arranged as a comparison, the air quantity, the water distribution quantity, the water inflow quantity and the water temperature are kept consistent with the system, and meanwhile, the temperatures of a water inlet detector and a water outlet detector are recorded, and are shown in a table 1.
Example 3: the water film cooling strengthening method of the air cooler adopts the following specific process.
Adjusting the included angle between the whole cooled medium channel and the horizontal plane to be 60 degrees, wherein the wind speeds of a film distribution process and a film vaporization process are respectively 0.5m/s and 2m/s, and the film distribution process comprises the steps of water film vaporization time length ratio = 1:3 and ripple internal angle 150 degrees; meanwhile, a conventional horizontal type light pipe air cooler is arranged as a comparison, the air quantity, the water distribution quantity, the water inflow quantity and the water temperature are kept consistent with the system, and meanwhile, the temperatures of a water inlet detector and a water outlet detector are recorded, and are shown in a table 1.
Example 4: the water film cooling strengthening method of the air cooler adopts the following specific process.
The included angle between the whole cooled medium channel and the horizontal plane is adjusted to 45 degrees, the wind speeds of a film distribution process and a film vaporization process are respectively 1m/s and 4m/s, the film distribution process is that the duration ratio of the film vaporization process is 1:3, the ripple inner angle is 160 degrees, meanwhile, a conventional horizontal light pipe air cooler is set as a comparison, the air quantity, the water distribution quantity, the water inlet quantity and the water temperature are kept consistent with the system, and meanwhile, the temperatures of a water inlet detector and a water outlet detector are recorded, and the table 1 is shown.
Example 5: the water film cooling strengthening method of the air cooler adopts the following specific process.
And adjusting the included angle between the whole cooled medium channel and the horizontal plane by 45 degrees, wherein the wind speeds of a film distribution process and a film vaporization process are respectively 1m/s and 4m/s, the film distribution process comprises the steps of enabling the film vaporization time length ratio to be 1:5 and the ripple inner angle to be 160 degrees, setting a conventional horizontal light pipe air cooler as a comparison, keeping the air quantity, the water distribution quantity, the water inlet quantity and the water temperature consistent with the system, and recording the temperatures of a water inlet detector and a water outlet detector, wherein the temperatures are shown in a table 1.
Example 6: the water film cooling strengthening method of the air cooler adopts the following specific process.
And adjusting the included angle between the whole cooled medium channel and the horizontal plane by 45 degrees, wherein the wind speed in the film distribution process and the water film vaporization process is respectively 1m/s and 4m/s, the water film vaporization time length ratio is 1:3, the ripple inner angle is 170 degrees, meanwhile, a conventional horizontal light pipe air cooler is arranged as a comparison, the wind quantity, the water distribution quantity, the water inlet quantity and the water temperature are kept consistent with the system, and meanwhile, the temperatures of a water inlet detector and a water outlet detector are recorded, and the table 1 is shown.
The ambient temperature during the test of the above examples was substantially 20℃and the humidity was 40% to 50%, and the recorded results are shown in Table 1 below.
Table 1: recording results of various embodiments
As can be seen from Table 1, the cooling effect can be effectively improved by adopting the device and the method compared with the conventional air cooler. The device and the method realize water film cooling reinforcement on the basis of a closed air cooler, wherein the water film cooling reinforcement process is to adopt atomized water drops to reach the surface of a hanging template, and the water drops are trapped by the hanging template and quickly spread to generate a thin water film under the actions of self gravity, air flow, special hanging template shape and hydrophilic surface; the method divides the cooling process into two stages of water film arrangement and water film, dynamically adjusts the optimal conditions of the two stages through the airflow guide plate, greatly promotes the vaporization efficiency of the water film and directly exchanges heat on the heat exchange surface, realizes the high-efficiency cooling with low water consumption, and has the characteristics of simple structure, lower cost and the like.
Claims (4)
1. The water film cooling strengthening method of the air cooler adopts a water film cooling strengthening device of the air cooler, wherein the device comprises a tube bundle, a film hanging plate (2), a water tank (4), an atomizer (5) and an airflow guide plate (3); the tube bundle is obliquely arranged above the pool (4); the plurality of film hanging plates (2) are arranged in parallel and at intervals, and the tube bundles penetrate through each film hanging plate (2); an atomizer (5) is arranged in the water tank (4); the air flow guide plate (3) is arranged between the tube bundle, the film-hanging plate (2) and the water tank (4); an air inducing device is arranged above the air cooler; the included angle between the tube bundle and the horizontal plane is 20-60 degrees, and the film hanging plate (2) is arranged perpendicular to the tube bundle; the film hanging plate (2) is a corrugated plate, and the inner angle of the corrugated plate is 150-180 degrees; the film-hanging plate (2) is coated with a hydrophilic coating, and is characterized in that the method comprises the following steps: i, atomizing: in the cooling process of the air cooler, an atomizer (5) is opened to atomize water in a water tank (4) into liquid drops;
II, film distribution process: under the action of induced air flow generated by the induced air device, the liquid drops rise and enter the gap of the film hanging plate; simultaneously, the opening and closing angle of the airflow guiding turning plate of the airflow guiding plate (3) is regulated, the flow speed of induced air flow passing through the airflow guiding plate (3) is reduced to 0-1 m/s, and the direction of induced air flow is guided to form a certain angle with the film hanging plate (2);
III, water film vaporization process: closing the atomizer (5), and adjusting the airflow guiding turning plate of the airflow guiding plate (3) to be in a fully opened state or a proper opened state to enable the flow speed of induced air to be 2-4 m/s, wherein the airflow direction is basically parallel to the film-hanging plate (2);
IV, repeating the atomization process to the water film vaporization process.
2. The air cooler water film cooling strengthening method according to claim 1, wherein: in the atomization process, the atomizer (5) atomizes the liquid into droplets of 50 μm and below.
3. The air cooler water film cooling strengthening method according to claim 1, wherein: the distance between the adjacent film hanging plates (2) is 3-5 mm.
4. A water film cooling strengthening method of an air cooler according to claim 1, 2 or 3, characterized in that: the air flow guide plate (3) adopts a shutter type air flow guide structure.
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| CN202111383936.3A CN114234674B (en) | 2021-11-19 | 2021-11-19 | Water film cooling strengthening device and method for air cooler |
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| CN202111383936.3A CN114234674B (en) | 2021-11-19 | 2021-11-19 | Water film cooling strengthening device and method for air cooler |
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| CN114234674B true CN114234674B (en) | 2024-01-23 |
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