CN115574385B - Wet curtain structure and heat exchange system with same - Google Patents
Wet curtain structure and heat exchange system with same Download PDFInfo
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- CN115574385B CN115574385B CN202211103032.5A CN202211103032A CN115574385B CN 115574385 B CN115574385 B CN 115574385B CN 202211103032 A CN202211103032 A CN 202211103032A CN 115574385 B CN115574385 B CN 115574385B
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- 239000007788 liquid Substances 0.000 claims abstract description 49
- 238000011176 pooling Methods 0.000 claims abstract description 48
- 238000005452 bending Methods 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 29
- 238000001816 cooling Methods 0.000 abstract description 23
- 238000012546 transfer Methods 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 238000012545 processing Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 238000003754 machining Methods 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Curtains And Furnishings For Windows Or Doors (AREA)
Abstract
The invention provides a wet curtain structure and a heat exchange system with the wet curtain structure. The wet curtain structure comprises: a plurality of wet curtain sheets, adjacent two wet curtain sheets are staggered to form an air flow channel, so that the air entering through the air flow channel contacts with the liquid attached to the wet curtain sheets and exchanges heat; wherein, the surface of at least one wet curtain sheet facing the adjacent wet curtain sheet is provided with a collecting concave part, at least part of liquid and at least part of gas flowing through the collecting concave part are collected in the collecting concave part, so as to increase the contact area between the gas and the liquid in the wet curtain structure; in the extending direction of the pooling concave parts, the pooling amount of at least one part of pooling concave parts is larger or smaller than that of the rest pooling concave parts. The invention effectively solves the problem of poor cooling effect of the wet curtain structure in the prior art.
Description
Technical Field
The invention relates to the technical field of heat exchange systems, in particular to a wet curtain structure and a heat exchange system with the wet curtain structure.
Background
At present, the evaporative cooling technology is an environment-friendly and efficient refrigeration scheme and is widely applied to industrial refrigeration equipment and household appliances, such as heat exchange systems of evaporative refrigeration air conditioners, cooling towers, cooling fans and the like. The wet curtain structure is used as a core component of the heat exchange system, and the structure of the wet curtain structure plays a key role in heat exchange.
In the prior art, the wet curtain structure is a filler formed by rolling paper fibers into a corrugated shape and then bonding the paper fibers layer by layer, and two adjacent corrugated papers are overlapped in a staggered manner to form a channel. In the channel, the gas and water are in direct contact and heat-moisture exchange, the water absorbs heat and evaporates to become water vapor, the gas releases heat and lowers the temperature, and the gas is treated into cold air with lower temperature and then is discharged.
However, the cooling effect of the wet curtain structure in the prior art is poor, and the heat exchange efficiency of the heat exchange system is affected.
Disclosure of Invention
The invention mainly aims to provide a wet curtain structure and a heat exchange system with the wet curtain structure, so as to solve the problem of poor cooling effect of the wet curtain structure in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a wet curtain structure comprising: a plurality of wet curtain sheets, adjacent two wet curtain sheets are staggered to form an air flow channel, so that the air entering through the air flow channel contacts with the liquid attached to the wet curtain sheets and exchanges heat; wherein, the surface of at least one wet curtain sheet facing the adjacent wet curtain sheet is provided with a collecting concave part, at least part of liquid and at least part of gas flowing through the collecting concave part are collected in the collecting concave part, so as to increase the contact area between the gas and the liquid in the wet curtain structure; in the extending direction of the pooling concave parts, the pooling amount of at least one part of pooling concave parts is larger or smaller than that of the rest pooling concave parts.
Further, along the extending direction of the pooling concave portion, the pooling concave portion comprises a first pooling section and a second pooling section which are communicated with each other, the pooling amount of the first pooling section is smaller than the pooling amount of the rest pooling concave portions, and the pooling amount of the second pooling section is larger than the pooling amount of the rest pooling concave portions.
Further, the first collecting section is one, and the second collecting section is one; or one first collecting section, a plurality of second collecting sections and a plurality of first collecting sections, wherein the first collecting section is positioned between two adjacent second collecting sections; the plurality of first collecting sections are provided, one second collecting section is provided, and the second collecting section is positioned between two adjacent first collecting sections; the first section that gathers is a plurality of, and the second gathers the section and is a plurality of, is provided with at least one second between two adjacent first sections that gather, is provided with at least one first section that gathers between two adjacent second sections that gather.
Further, the plurality of collecting recesses are arranged at intervals on the wet curtain sheet, a first collecting section of one collecting recess of the adjacent two collecting recesses is arranged adjacent to a first collecting section of the other collecting recess, and a second collecting section of one collecting recess of the adjacent two collecting recesses is arranged adjacent to a second collecting section of the other collecting recess.
Further, the pooling concave portion extends to both ends of the wet curtain sheet.
Further, the collecting concave part is a groove, the maximum groove width b1 of the groove is more than or equal to 2mm and less than or equal to 5mm, the minimum groove width b2 of the groove is more than or equal to 1mm and less than or equal to 3mm, and the difference between the maximum groove width b1 and the minimum groove width b2 is more than or equal to 1mm and less than or equal to 2mm; and/or, the maximum groove depth h1 of the groove is more than or equal to 1mm and less than or equal to 2mm, the minimum groove depth h2 of the groove is more than or equal to 0.5mm and less than or equal to 1mm, and the difference value between the maximum groove depth h1 and the minimum groove depth h2 is more than or equal to 0.5mm and less than or equal to 1mm; and/or, the maximum groove spacing a1 between two adjacent grooves is more than or equal to 7mm and less than or equal to 15mm, and the minimum groove spacing a2 between two adjacent grooves is more than or equal to 5mm and less than or equal to 10mm.
Further, the collecting concave part extends along the first direction, each wet curtain sheet comprises a plurality of bending sections which are sequentially connected along the second direction, and a first included angle is formed between the bending line of each bending section and the second direction; the second included angle theta between the bending section and the first direction is larger than or equal to 60 degrees and smaller than or equal to 120 degrees.
Further, the collecting concave part is a groove, and the groove is formed by at least partially protruding towards the adjacent wet curtain sheet; or the grooves may be formed by removing or cutting away at least a portion of the surface of the wet curtain sheet.
Further, the groove is an arc groove, a rectangular groove, a V-shaped groove or a trapezoid groove.
Further, on each wet curtain sheet, the area S1 occupied by all the collecting recesses and the total area S of the wet curtain sheet satisfy: s1 is less than or equal to 0.5S.
According to another aspect of the present invention, there is provided a heat exchange system comprising the wet curtain structure described above.
By applying the technical scheme of the invention, the wet curtain structure comprises a plurality of wet curtain sheets, and two adjacent wet curtain sheets are staggered to form an air flow channel. At least one of the wet curtain sheets has a collecting recess facing the surface of the wet curtain sheet adjacent thereto, and the collecting amount of at least part of the collecting recesses is not uniform. In this way, in the operation process of the heat exchange system, liquid flows on the wet curtain sheet and forms a water film, gas flows in the gas flow channel, the liquid and the gas are contacted in the gas flow channel and exchange heat, at least part of the liquid flowing through the collecting concave part and at least part of the gas are collected in the collecting concave part, so that the contact area of the gas and the liquid in the wet curtain structure is increased, the two are subjected to full heat exchange, the gradual change type collecting concave part can enable the flow of an internal flow field of the wet curtain structure to be more turbulent, the turbulence effect is increased, the internal heat and mass transfer resistance is reduced, the evaporative cooling effect of the wet curtain structure is improved, and the problem that the cooling effect of the wet curtain structure in the prior art is poor is solved. Meanwhile, the gas flowing through the collecting concave part can be turbulent or vortex at the collecting concave part to destroy the boundary layer between the gas and the liquid, so that the gas and the liquid are mixed more fully, the heat transfer resistance between the gas and the liquid is reduced to a great extent, the heat transfer and mass transfer between the gas and a water film can be effectively enhanced, and the evaporation cooling effect of the wet curtain structure is effectively improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
fig. 1 shows a schematic perspective view of a wet curtain sheet according to an embodiment of a wet curtain structure of the present invention;
FIG. 2 shows a top view of a wet curtain sheet of the wet curtain structure of FIG. 1;
FIG. 3 shows a cross-sectional view A-A of a wet curtain sheet of the wet curtain structure of FIG. 1;
fig. 4 shows a schematic perspective view of the wet curtain structure of fig. 1.
Wherein the above figures include the following reference numerals:
10. Wet curtain sheets;
20. An air flow channel;
30. A collecting recess; 31. a first pooling section; 32. and a second pooling section.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used generally with respect to the orientation shown in the drawings or to the vertical, vertical or gravitational orientation; also, for ease of understanding and description, "left, right" is generally directed to the left, right as shown in the drawings; "inner and outer" refer to inner and outer relative to the outline of the components themselves, but the above-described orientation terms are not intended to limit the present invention.
In order to solve the problem of poor cooling effect of a wet curtain structure in the prior art, the application provides the wet curtain structure and a heat exchange system with the wet curtain structure.
As shown in fig. 1 to 4, the wet curtain structure includes a plurality of wet curtain sheets 10. Adjacent two wet curtain sheets 10 are staggered to form a gas flow channel 20 so that gas entering through the gas flow channel 20 contacts and exchanges heat with liquid attached to the wet curtain sheets 10. Wherein, at least one wet curtain sheet 10 has a collecting concave portion 30 facing the surface of the wet curtain sheet 10 adjacent thereto, at least part of the liquid and at least part of the gas flowing through the collecting concave portion 30 are collected in the collecting concave portion 30 to increase the contact area of the gas and the liquid in the wet curtain structure. In the direction of extension of the pooling concave portions 30, the pooling amount of at least a part of the pooling concave portions 30 is larger or smaller than the pooling amount of the remaining pooling concave portions 30.
By applying the technical scheme of the embodiment, the wet curtain structure comprises a plurality of wet curtain sheets 10, and two adjacent wet curtain sheets 10 are staggered to form an air flow channel 20. At least one of the wet curtain sheets 10 has a collecting recess 30 facing a surface of the wet curtain sheet 10 adjacent thereto, and at least a part of the collecting recesses 30 are not uniform in collecting amount. In this way, in the operation process of the heat exchange system, the liquid flows on the wet curtain sheet 10 and forms a water film, the gas flows in the gas flow channel 20, the liquid contacts with the gas in the gas flow channel 20 and exchanges heat, at least part of the liquid flowing through the collecting concave part 30 and at least part of the gas are collected in the collecting concave part 30, so that the contact area between the gas in the wet curtain structure and the liquid is increased, the contact area between the gas and the liquid is fully exchanged, the flow of the internal flow field of the wet curtain structure can be more disturbed by the gradual change collecting concave part, the turbulence effect is increased, the internal heat and mass transfer resistance is reduced, the evaporation cooling effect of the wet curtain structure is improved, and the problem of poor cooling effect of the wet curtain structure in the prior art is solved. Meanwhile, the gas flowing through the collecting concave part 30 can be turbulent or vortex at the collecting concave part 30 to destroy the boundary layer between the gas and the liquid, so that the gas and the liquid are mixed more fully, the heat transfer resistance between the gas and the liquid is reduced to a great extent, the heat transfer and mass transfer between the gas and a water film can be effectively enhanced, and the evaporation cooling effect of the wet curtain structure is effectively improved.
In this embodiment, the collecting recess 30 is a gradual change groove, which can make the flow of the internal flow field of the wet curtain structure more turbulent, increase turbulence effect, reduce the internal heat and mass transfer resistance, and promote the evaporative cooling effect of the wet curtain structure.
In this embodiment, the above arrangement of the collecting recess 30 makes it possible to enhance the gas-liquid interface area and the vortex strength of the flow field inside the wet curtain structure as much as possible without increasing the wind resistance.
Specifically, in the present embodiment, the water flow is affected by the collecting recess 30, resulting in a more disordered flow thereof, and thus, a surface of almost the entire wet curtain structure is subjected to the liquid distribution, compared to the case where the surface of the existing wet curtain structure is difficult to be subjected to the liquid distribution. Compared with the existing wet curtain structure, the area with less swirl intensity exceeding 500 is provided, in the embodiment, the swirl intensity of a plurality of areas in and near the collecting concave part 30 exceeds 500, and the evaporative cooling effect of the wet curtain structure is improved.
As shown in fig. 2, along the extending direction of the pooling concave portion 30, the pooling concave portion 30 includes a first pooling section 31 and a second pooling section 32 which are communicated with each other, the pooling amount of the first pooling section 31 is smaller than the pooling amount of the remaining pooling concave portion 30, and the pooling amount of the second pooling section 32 is larger than the pooling amount of the remaining pooling concave portion 30.
Optionally, the first collecting section 31 is one, and the second collecting section 32 is one; or one first collecting section 31, a plurality of second collecting sections 32, and the first collecting section 31 is positioned between two adjacent second collecting sections 32; the number of the first collecting sections 31 is multiple, the number of the second collecting sections 32 is one, and the second collecting sections 32 are positioned between two adjacent first collecting sections 31; the first section of gathering 31 is a plurality ofly, and the second section of gathering 32 is a plurality ofly, is provided with at least one second section of gathering 32 between two adjacent first sections of gathering 31, is provided with at least one first section of gathering 31 between two adjacent second sections of gathering 32. Like this, the above-mentioned setting makes the number of first section 31 and second section 32 that gathers select more nimble to satisfy different user demands and operating mode, also promoted staff's processing flexibility.
In this embodiment, the number of the first collecting sections 31 is plural, the number of the second collecting sections 32 is plural, one second collecting section 32 is disposed between two adjacent first collecting sections 31, and one first collecting section 31 is disposed between two adjacent second collecting sections 32, so that the structure of the collecting concave portion 30 is simpler, the processing and implementation are easy, and the processing cost of the wet curtain structure is reduced.
Alternatively, a plurality of collecting recesses 30 are provided, the plurality of collecting recesses 30 being provided at intervals on the wet curtain sheet 10, the first collecting section 31 of one collecting recess 30 of the adjacent two collecting recesses 30 being provided adjacent to the first collecting section 31 of the other collecting recess 30, and the second collecting section 32 of one collecting recess 30 of the adjacent two collecting recesses 30 being provided adjacent to the second collecting section 32 of the other collecting recess 30. In this way, in the running process of the wet curtain structure, water is easy to deviate to one side due to the influence of the 45-degree inclined straight channel of the corrugation, and the more obvious the downward characteristic is, the wider the groove spacing between two adjacent collecting concave parts 30 is, the narrower the upper part is, and the liquid distribution uniformity of the lower part of the wet curtain structure is improved.
In the present embodiment, the pooling concave portion 30 extends to both ends of the wet curtain sheet 10. In this way, the above arrangement greatly increases the total collection amount of the collection concave portion 30 on one hand, so that the gas and the liquid are fully contacted and mixed in the collection concave portion 30, and the heat exchange efficiency of the wet curtain structure is improved; on the other hand, the processing of the collecting concave part 30 is easier and simpler, and the processing difficulty is reduced.
Alternatively, the collecting recess 30 is a groove, the maximum groove width b1 of which is greater than or equal to 2mm and less than or equal to 5mm, the minimum groove width b2 of which is greater than or equal to 1mm and less than or equal to 3mm, and the difference between the maximum groove width b1 and the minimum groove width b2 is greater than or equal to 1mm and less than or equal to 2mm; and/or, the maximum groove depth h1 of the groove is more than or equal to 1mm and less than or equal to 2mm, the minimum groove depth h2 of the groove is more than or equal to 0.5mm and less than or equal to 1mm, and the difference value between the maximum groove depth h1 and the minimum groove depth h2 is more than or equal to 0.5mm and less than or equal to 1mm; and/or, the maximum groove spacing a1 between two adjacent grooves is more than or equal to 7mm and less than or equal to 15mm, and the minimum groove spacing a2 between two adjacent grooves is more than or equal to 5mm and less than or equal to 10mm. Like this, above-mentioned setting makes the size of recess select, the selection of the groove spacing between two adjacent recesses more reasonable, under the prerequisite of guaranteeing wet curtain piece 10 structural strength, has promoted the recess fully and has gathered effect to gas and liquid to ensure that the two carries out abundant heat exchange, promotes wet curtain structure's cooling effect.
In this embodiment, the maximum groove width b1 of the groove is 3.5mm, the minimum groove width b2 of the groove is 2mm, and the difference between the maximum groove width b1 and the minimum groove width b2 is 1.5mm. The maximum groove depth h1 of the groove is 1.5mm, the minimum groove depth h2 of the groove is 0.8mm, and the difference between the maximum groove depth h1 and the minimum groove depth h2 is 0.7mm. The maximum groove pitch a1 between two adjacent grooves is 10mm, and the minimum groove pitch a2 between two adjacent grooves is 8mm. Like this, above-mentioned numerical value is selected and is made the processing of recess easier, simple and convenient, has reduced the processing degree of difficulty of recess, has also promoted wet curtain piece 10's structural strength, has prolonged wet curtain structure's life.
It should be noted that the maximum groove width b1 of the groove is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the maximum groove width b1 of the groove is 2.5mm, or 3mm, or 4mm, or 4.5mm.
It should be noted that the minimum groove width b2 of the groove is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the minimum groove width b2 of the groove is 1.5mm, or 2.5mm.
It should be noted that, the value of the difference between the maximum slot width b1 and the minimum slot width b2 is not limited thereto, and may be adjusted according to the working condition and the use requirement. Alternatively, the difference between the maximum groove width b1 and the minimum groove width b2 is 2mm, or 2.5mm.
It should be noted that the maximum groove depth h1 of the groove is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the maximum groove depth h1 of the groove is 1.3mm, or 1.8mm, or 2mm, or 2.5mm, or 2.8mm.
It should be noted that the minimum groove depth h2 of the groove is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the minimum groove depth h2 of the groove is 0.6mm, or 0.8mm.
It should be noted that, the value of the difference between the maximum groove depth h1 and the minimum groove depth h2 is not limited thereto, and may be adjusted according to the working condition and the use requirement. Alternatively, the difference between the maximum groove depth h1 and the minimum groove depth h2 is 0.6mm, or 0.8mm.
It should be noted that, the maximum slot distance a1 between two adjacent grooves is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the maximum groove spacing a1 between two adjacent grooves is 8mm, or 9mm, or 11mm, or 12mm, or 13mm, or 14mm.
It should be noted that, the minimum slot distance a2 between two adjacent grooves is not limited to this, and can be adjusted according to the working condition and the use requirement. Alternatively, the minimum groove spacing a2 between two adjacent grooves is 6mm, or 7mm, or 9mm.
In this embodiment, the collecting recess 30 extends along a first direction, each wet curtain sheet 10 includes a plurality of bending sections sequentially connected along a second direction, and a first included angle is formed between a bending line of each bending section and the second direction; the second included angle theta between the bending section and the first direction is larger than or equal to 60 degrees and smaller than or equal to 120 degrees. In this way, after the two adjacent wet curtain sheets 10 are adhered together, the above arrangement ensures that at least part of each collecting recess 30 is located in the airflow channel 20, so as to ensure that at least part of the liquid flowing through the collecting recess 30 and at least part of the gas collect in the collecting recess 30, increase the contact area between the gas and the liquid in the wet curtain structure, and ensure that each collecting recess 30 has a collecting effect.
In this embodiment, the bending direction of each bending section is a sine wave direction, and the bending line and the bending surface of each bending section are parallel to each other and perpendicular to the second direction.
In this embodiment, the second angle θ formed between the bending section and the first direction is 90 °, so that the machining of the collecting recess 30 is easier and simpler, and the machining cost and the machining difficulty are reduced.
It should be noted that the value of the second included angle a is not limited to this, and may be adjusted according to the working condition and the use requirement. Optionally, the second included angle θ is 65 °, or 70 °, or 75 °, or 80 °, or 85 °, or 95 °, or 100 °, or 105 °, or 110 °, or 115 °.
Alternatively, the pooling concave portion 30 is a groove formed by at least a portion of the wet curtain sheet 10 protruding toward the wet curtain sheet 10 adjacent thereto; or the grooves may be formed by removing or cutting at least a portion of the surface of the wet curtain sheet 10. Like this, above-mentioned setting makes the shaping mode that gathers concave part 30 more various to satisfy different user demands and operating mode, also promoted staff's processing flexibility.
In this embodiment, the grooves are formed by the protrusion of at least part of the wet curtain sheet 10 towards the adjacent wet curtain sheet 10, and the grooves are arranged on the first surface of the wet curtain sheet 10, so that turbulence protrusions are formed on the second surface of the wet curtain sheet 10, and the distribution positions of the gas and the liquid on the wet curtain sheet 10 are influenced by the turbulence protrusions, so that the flow direction of the gas flow passing through the gas flow channel 20 is disturbed, the boundary layer between the gas and the liquid is further damaged, the gas and the liquid are mixed more fully, the heat transfer resistance between the gas and the liquid is reduced to a greater extent, the heat and mass transfer between the gas and the water film can be effectively enhanced, and the evaporative cooling effect of the wet curtain structure is effectively improved.
Optionally, the groove is an arc-shaped groove, a rectangular groove, a V-shaped groove or a trapezoid groove. Like this, above-mentioned setting makes the shape of recess more various to satisfy different user demand and operating mode, also promoted staff's processing flexibility.
In this embodiment, the grooves are arc grooves, so that the structure of the collecting recess 30 is simpler, and the wet curtain structure is easy to process and implement, and the overall processing cost of the wet curtain structure is reduced.
It should be noted that the shape of the groove is not limited to this, and can be adjusted according to the working condition and the use requirement. Optionally, the groove is a V-groove, or a trapezoidal groove.
Alternatively, on each wet curtain sheet 10, the area S1 occupied by all the pooling concave portions 30 and the total area S of the wet curtain sheet 10 satisfy: s1 is less than or equal to 0.5S. Thus, the above arrangement sufficiently improves the collection effect of the grooves on the gas and the liquid on the premise of ensuring the structural strength of the wet curtain sheet 10, so as to ensure the sufficient heat exchange between the grooves and the liquid and improve the cooling effect of the wet curtain structure.
In the embodiment, CFD (Computational Fluid Dynamics) simulation (computational fluid dynamics simulation) is utilized to verify that the wet curtain structure in the embodiment can effectively increase the gas-liquid interface area and the vortex strength of the flow field in the wet curtain structure, and further improve the integral evaporative cooling effect of the wet curtain structure.
Table 1 parameter comparison table of the existing wet curtain structure and the wet curtain structure in the present embodiment
From table 1, it can be derived that, compared with the existing wet curtain structure, the effective cloth area of the wet curtain structure in this embodiment is increased by 46.25%, the body average vortex strength is increased by 48.09%, and according to the previous research conclusion, the heat and mass transfer effects of air and a water film are increased by the increase of the two, so that the evaporative cooling effect of the wet curtain structure is improved.
The application also provides a heat exchange system (not shown) comprising the wet curtain structure.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
The wet curtain structure comprises a plurality of wet curtain sheets, and two adjacent wet curtain sheets are arranged in a staggered manner to form an air flow channel. At least one of the wet curtain sheets has a collecting recess facing the surface of the wet curtain sheet adjacent thereto, and the collecting amount of at least part of the collecting recesses is not uniform. In this way, in the operation process of the heat exchange system, liquid flows on the wet curtain sheet and forms a water film, gas flows in the gas flow channel, the liquid and the gas are contacted in the gas flow channel and exchange heat, at least part of the liquid flowing through the collecting concave part and at least part of the gas are collected in the collecting concave part, so that the contact area of the gas and the liquid in the wet curtain structure is increased, the two are subjected to full heat exchange, the gradual change type collecting concave part can enable the flow of an internal flow field of the wet curtain structure to be more turbulent, the turbulence effect is increased, the internal heat and mass transfer resistance is reduced, the evaporative cooling effect of the wet curtain structure is improved, and the problem that the cooling effect of the wet curtain structure in the prior art is poor is solved. Meanwhile, the gas flowing through the collecting concave part can be turbulent or vortex at the collecting concave part to destroy the boundary layer between the gas and the liquid, so that the gas and the liquid are mixed more fully, the heat transfer resistance between the gas and the liquid is reduced to a great extent, the heat transfer and mass transfer between the gas and a water film can be effectively enhanced, and the evaporation cooling effect of the wet curtain structure is effectively improved.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A wet curtain structure comprising:
A plurality of wet curtain sheets (10), wherein two adjacent wet curtain sheets (10) are staggered to form an air flow channel (20), so that air entering through the air flow channel (20) contacts with liquid attached on the wet curtain sheets (10) and exchanges heat;
wherein at least one of the wet curtain sheets (10) has a collecting recess (30) facing the surface of the wet curtain sheet (10) adjacent thereto, at least part of the liquid and at least part of the gas flowing through the collecting recess (30) being collected in the collecting recess (30) to increase the contact area of the gas and the liquid in the wet curtain structure;
along the extending direction of the pooling concave parts (30), the pooling amount of at least one part of the pooling concave parts (30) is larger or smaller than the pooling amount of the rest of the pooling concave parts (30);
Along the extending direction of the collecting concave part (30), the collecting concave part (30) comprises a first collecting section (31) and a second collecting section (32) which are communicated with each other, the collecting amount of the first collecting section (31) is smaller than the collecting amount of the rest of the collecting concave parts (30), and the collecting amount of the second collecting section (32) is larger than the collecting amount of the rest of the collecting concave parts (30).
2. The wet curtain structure of claim 1 wherein the wet curtain structure comprises,
The first collecting section (31) is one, and the second collecting section (32) is one; or alternatively
The number of the first collecting sections (31) is one, the number of the second collecting sections (32) is multiple, and the first collecting sections (31) are positioned between two adjacent second collecting sections (32);
The number of the first collecting sections (31) is multiple, the number of the second collecting sections (32) is one, and the second collecting sections (32) are positioned between two adjacent first collecting sections (31);
The first collecting sections (31) are multiple, the second collecting sections (32) are multiple, at least one second collecting section (32) is arranged between two adjacent first collecting sections (31), and at least one first collecting section (31) is arranged between two adjacent second collecting sections (32).
3. Wet curtain structure according to claim 1, characterized in that the collecting recesses (30) are provided in plurality, the collecting recesses (30) being provided at intervals on the wet curtain sheet (10), a first collecting section (31) of one collecting recess (30) of two adjacent collecting recesses (30) being provided adjacent to a first collecting section (31) of the other collecting recess (30), a second collecting section (32) of one collecting recess (30) of two adjacent collecting recesses (30) being provided adjacent to a second collecting section (32) of the other collecting recess (30).
4. Wet curtain structure according to claim 1, characterized in that the collecting recess (30) extends to both ends of the wet curtain sheet (10).
5. Wet curtain structure according to claim 1, characterized in that the collecting recess (30) is a groove,
The maximum groove width b1 of the groove is more than or equal to 2mm and less than or equal to 5mm, the minimum groove width b2 of the groove is more than or equal to 1mm and less than or equal to 3mm, and the difference between the maximum groove width b1 and the minimum groove width b2 is more than or equal to 1mm and less than or equal to 2mm; and/or the number of the groups of groups,
The maximum groove depth h1 of the groove is more than or equal to 1mm and less than or equal to 2mm, the minimum groove depth h2 of the groove is more than or equal to 0.5mm and less than or equal to 1mm, and the difference value between the maximum groove depth h1 and the minimum groove depth h2 is more than or equal to 0.5mm and less than or equal to 1mm; and/or the number of the groups of groups,
The maximum groove spacing a1 between two adjacent grooves is more than or equal to 7mm and less than or equal to 15mm, and the minimum groove spacing a2 between two adjacent grooves is more than or equal to 5mm and less than or equal to 10mm.
6. Wet curtain structure according to claim 1, characterized in that the collecting recess (30) extends along a first direction, each wet curtain sheet (10) comprises a plurality of bending sections connected in sequence along a second direction, and the bending lines of each bending section are arranged at a first included angle with the second direction; the second included angle theta between the bending section and the first direction is more than or equal to 60 degrees and less than or equal to 120 degrees.
7. Wet curtain structure according to claim 1, characterized in that the collecting recess (30) is a groove formed by at least part of the wet curtain sheet (10) protruding towards the wet curtain sheet (10) adjacent thereto; or alternatively
The grooves are formed by removing or cutting away at least part of the surface of the wet curtain sheet (10).
8. The wet curtain structure of claim 7, wherein the groove is an arcuate groove, a rectangular groove, a V-groove, or a trapezoidal groove.
9. Wet curtain structure according to claim 1, characterized in that, on each wet curtain sheet (10), between the area S1 occupied by all the collecting recesses (30) and the total area S of the wet curtain sheets (10) is satisfied: s1 is less than or equal to 0.5S.
10. A heat exchange system comprising a wet curtain structure as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211103032.5A CN115574385B (en) | 2022-09-09 | 2022-09-09 | Wet curtain structure and heat exchange system with same |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211103032.5A CN115574385B (en) | 2022-09-09 | 2022-09-09 | Wet curtain structure and heat exchange system with same |
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| CN115574385A CN115574385A (en) | 2023-01-06 |
| CN115574385B true CN115574385B (en) | 2024-08-20 |
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| CN115574385A (en) | 2023-01-06 |
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