CN108826539B - Tubular dew point indirect evaporative cooling air conditioner - Google Patents
Tubular dew point indirect evaporative cooling air conditioner Download PDFInfo
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- CN108826539B CN108826539B CN201810437329.2A CN201810437329A CN108826539B CN 108826539 B CN108826539 B CN 108826539B CN 201810437329 A CN201810437329 A CN 201810437329A CN 108826539 B CN108826539 B CN 108826539B
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- heat exchange
- exchange tube
- shell
- air conditioner
- evaporative cooling
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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)
Abstract
The invention provides a pipe dew point indirect evaporative cooling air conditioner, which comprises a shell and an exhaust fan, wherein the top of the shell is provided with an air outlet, the two sides of the middle part of the shell are respectively provided with an air inlet and an air outlet, the air blower comprises an air blower body, a heat exchange tube group and a water distribution system, wherein the heat exchange tube group and the water distribution system are arranged in a shell, the heat exchange tube group comprises a plurality of vertical heat exchange tubes with transverse fins outside, a porous water absorption layer is arranged on the inner surface of each vertical heat exchange tube, the water distribution system comprises a spraying device and a circulating water tank, the circulating water tank is connected with the spraying device through a pipeline, a circulating water pump is arranged on the pipeline, the spraying device comprises a water distribution tube and a spraying tube, the upper end and the lower end of the heat exchange tube group are fixed in the shell through a porous plate, a secondary air inlet chamber is formed between the porous plate at the lower part and the circulating water tank, and the. The invention has compact structure, reduces the consumption of equipment manufacturing materials, and greatly improves the heat exchange efficiency and the refrigeration energy efficiency ratio.
Description
Technical Field
The invention belongs to the field of air conditioning equipment, and particularly relates to a tubular dew point indirect evaporative cooling air conditioner with an air supply temperature approaching to an air inlet dew point temperature.
Background
The basic principle of evaporative cooling technology is to use the heat and moisture transfer generated when unsaturated air is in contact with water to obtain cold. The cooling technology takes water as a refrigerant, does not discharge CFCs and HCFCs, has lower operation energy consumption than a conventional direct expansion mechanical compression refrigeration mode, is an economic, environment-friendly and sustainable development refrigeration technology, and has wide application prospect in the fields of air conditioners and ventilation.
Evaporative cooling is mainly divided into two basic forms of direct evaporative cooling and indirect evaporative cooling, and indirect evaporative cooling heat exchangers are commonly used at present in two forms of plate type and tube type. However, the flow channel of the plate-type indirect evaporative cooler is narrow, and the phenomena of scaling and blockage are easy to occur in the flow channel, so that the resistance in the flow channel is increased, and the heat exchange efficiency of the heat exchanger is reduced; and there is a problem in that the dry and wet passage side thermal resistances are not balanced. The prior commonly used tubular indirect evaporative cooler is characterized in that heat and mass exchange is carried out between secondary air outside a tube and a water film outside the tube, primary air inside the tube is cooled, namely the secondary air outside the tube is used as a wet side, and the primary air inside the tube is used as a dry side, so that the unbalance of thermal resistances at two sides is aggravated, and the refrigeration efficiency is low. The equipment volume and the material consumption are both larger under the condition of obtaining the same cold quantity. In addition, the traditional indirect evaporative cooler has limited air cooling amplitude, and the theoretical lowest air supply temperature is the wet bulb temperature of the inlet air. Therefore, the above-mentioned weakness of the conventional indirect evaporative cooler prevents further popularization of the cooling technology.
Disclosure of Invention
In view of the above, the present invention is directed to a tubular dew point indirect evaporative cooling air conditioner, which combines the dew point evaporative cooling cycle principle, wherein heat exchange tubes are arranged vertically, and the interior of each tube is used as a wet side and the exterior of each tube is used as a dry side, and primary air flows through the exterior of each tube and secondary air flows through the interior of each tube, so that the tubular dew point indirect evaporative cooling air conditioner has a compact structure, reduces the consumption of equipment manufacturing materials, not only provides air supply approaching the dew point temperature of inlet air, but also greatly improves the heat exchange efficiency and the refrigeration energy efficiency.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a tube dew point indirect evaporation cooling air conditioner comprises a shell, a heat exchange tube set and a water distribution system, wherein the top of the shell is provided with an air outlet, the two sides of the middle of the shell are respectively provided with an air inlet and an air outlet, the interior of the shell close to the air outlet and the air inlet is respectively provided with an exhaust fan and an air feeder, the heat exchange tube set and the water distribution system are both arranged inside the shell, the heat exchange tube set comprises a plurality of vertical heat exchange tubes with transverse fins outside, the inner surface of each vertical heat exchange tube is provided with a porous water absorption layer from top to bottom, the water distribution system comprises a spray device arranged at the top of the heat exchange tube set and a circulating water tank arranged at the bottom of the heat exchange tube set, the circulating water tank is connected with the spray device through a pipeline, the pipeline is provided with a circulating water pump, the spray device comprises a plurality of water distribution tubes which are horizontally arranged, and a, every in the play water end of vertical shower stretches into the vertical heat exchange tube upper end that corresponds perpendicularly, the heat exchange tube group about both ends fix in the casing through the perforated plate respectively, and the trepanning of two perforated plates and vertical heat exchange tube one-to-one, form the secondary air inlet chamber between perforated plate and the circulating water tank of lower part.
Furthermore, the cooling air conditioner also comprises a water baffle which is arranged in the shell and close to the exhaust fan.
Furthermore, the porous water absorption layer is attached to the inner wall of the vertical heat exchange tube.
Furthermore, a spring for pressing the porous water absorption layer on the inner wall of the vertical heat exchange tube is arranged in each vertical heat exchange tube.
Furthermore, each vertical heat exchange tube can also adopt a prefabricated integrated heat exchange tube with a porous water absorption layer on the inner side surface.
Further, the porous water absorption layer is a porous material layer.
Furthermore, the vertical heat exchange tube is a circular tube or an elliptical tube.
Furthermore, the arrangement mode of the plurality of vertical heat exchange tubes is in a forward row or a fork row.
Further, the transverse ribs are round or flat ribs.
Furthermore, the vertical heat exchange tube is a metal heat exchange tube or a non-metal heat exchange tube.
The tubular dew point indirect evaporative cooling air conditioner has the advantages that fresh air enters through the air inlet, flows through the outer surface of the vertical heat exchange tube after passing through the air feeder to exchange heat with secondary air and water in the tube, one part of cooled air is used as air supply and flows out through the air supply outlet on the right side of the air conditioner, the temperature of the air supply at the moment approaches the dew point temperature of the air inlet, the other part of cooled air is used as secondary air and enters the vertical heat exchange tube, flows out from the water baffle plate from bottom to top, and is exhausted to the outside through the. The water distribution system comprises a water distribution pipe at the top of the heat exchange pipe, a spray pipe, a water pump at the bottom and a water tank, wherein the water pump is connected with the water distribution pipe in the water tank through a pipeline, a porous water absorption material is attached to the inside of the heat exchange pipe, and secondary air and circulating water reversely flow in the pipe.
Compared with the prior art, the tubular dew point indirect evaporative cooling air conditioner has the following advantages:
1. the heat exchange tube of the indirect evaporative cooler is of a vertical structure, so that the structure is compact, and the occupied space is saved.
2. The fins are additionally arranged on the outer surface of the heat exchange tube serving as the dry side to carry out heat exchange enhancement, so that the heat exchange efficiency is improved.
3. The heat exchange tube is used as a wet side, and the inner wall of the heat exchange tube is coated with the porous material, so that the contact area of secondary air and water is increased, the evaporation speed is increased, and the heat exchange efficiency is enhanced.
4. The porous material can be tightly supported and attached to the inner wall of the pipe by utilizing the spring, the turbulent flow of secondary air in the pipe is enhanced, and the surface of the spring is treated by adopting a super-hydrophilic material, so that the heat and mass transfer effects in the pipe are enhanced.
6. Circulating water is directly sprayed on the porous material in the heat exchange tube and falls down along the heat exchange tube under the action of gravity, so that the electricity and water consumption is saved.
7. Indoor return air and outdoor air can be mixed and then sent into the air conditioner as fresh air, and the heat exchange efficiency can be improved.
8. The porous water absorption layer has good water retention property, can utilize an intermittent water distribution mode, shortens the running time of the water pump and has better electricity-saving effect.
9. Set up the breakwater, separate the water droplet that secondary air carried, both reduced the influence to external environment humidity, avoided the water waste again.
10. The arrangement of the transverse ribs outside the vertical heat exchange tube solves the problem of unbalanced heat exchange inside and outside the tube, and the transverse ribs with different sizes are correspondingly arranged at different positions according to the heat exchange effect of the heat exchange tube group, so that the heat exchange is more facilitated, and the heat exchange efficiency is high.
11. And part of the air supply enters the heat exchange tube as secondary air, so that the air supply temperature is lower than the air inlet wet bulb temperature and approaches the air inlet dew point temperature, the energy-saving advantage is obvious, and the refrigeration effect is good.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a tubular dew point indirect evaporative cooling air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a spraying device of a tubular dew point indirect evaporative cooling air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic view of a structure of a single vertical heat exchange tube and a single vertical shower spray tube in the tube-type dew-point indirect evaporative cooling air conditioner according to the embodiment of the invention;
FIG. 4 is a schematic view of the air flow of a single vertical heat exchange tube of a tube dew point indirect evaporative cooling air conditioner according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a vertical heat exchange tube with fins of a tubular dew point indirect evaporative cooling air conditioner according to an embodiment of the invention;
FIG. 6 is a schematic structural diagram of the inside of a vertical heat exchange tube of the tube-type dew point indirect evaporative cooling air conditioner according to the embodiment of the invention;
fig. 7 is a schematic structural diagram of a perforated plate of a tubular dew point indirect evaporative cooling air conditioner according to an embodiment of the present invention.
Description of reference numerals:
1-air inlet, 2-air feeder, 3-heat exchange tube set, 301-vertical heat exchange tube, 4-air supply outlet, 5-water tank, 6-water pump, 7-water distribution tube, 8-water retaining tube, 9-exhaust fan, 10-exhaust outlet, 12-vertical spray tube, 13-porous water absorption layer, 14-transverse fin, 15-spring, 16-secondary air inlet chamber, 17-porous plate and 18-trepan.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1-7, the tube dew point indirect evaporative cooling air conditioner comprises a shell, a heat exchange tube group 3 and a water distribution system, wherein the top of the shell is provided with an air outlet 10, the two sides of the middle of the shell are respectively provided with an air inlet 1 and an air outlet 4, the interior of the shell close to the air outlet 10 and the air inlet 1 is respectively provided with an exhaust fan 9 and a blower 2, the heat exchange tube group 3 and the water distribution system are both arranged inside the shell, the heat exchange tube group 3 comprises a plurality of vertical heat exchange tubes 301 with transverse fins 14 outside the tubes, the inner surface of each vertical heat exchange tube 301 is pasted with a porous water absorption layer 13 from top to bottom, the water distribution system comprises a spraying device arranged at the top of the heat exchange tube group 3 and a circulating water tank 5 arranged at the bottom of the heat exchange tube group 3, the circulating water tank 5 is connected with the spraying device through a pipeline, the pipeline is provided with a circulating water pump 6, every many vertical shower 12 of equipartition on the water distributor 7, every in the play water end of shower 12 stretches into the vertical heat exchange tube 301 upper end that corresponds perpendicularly, every shower 12 is provided with a plurality of spray holes on being close to the pipe wall of water end, heat exchange tube group 3 about both ends all fix in the casing through a perforated plate 17, and two perforated plate 17's trepanning 18 and vertical heat exchange tube 301 one-to-one, form secondary air inlet chamber 16 between perforated plate 17 of lower part and the circulating water tank 5. The air inlet 1 is positioned on the left side of the shell, and the air supply outlet 4 is positioned on the right side of the shell.
The transverse ribs 14 have different sizes at the corresponding vertical heat exchange tubes 301 according to the heat exchange degree of the cooling air conditioner, the size of the transverse rib 14 at the position with high heat exchange strength is smaller than that of the transverse rib 14 at the position with low heat exchange strength, and the transverse ribs 14 are round or flat type ribs.
The cooling air conditioner also comprises a water baffle 8, wherein the water baffle 8 is arranged in the shell and is close to the exhaust fan 9, and the water baffle 8 mainly plays a role of isolating moisture brought out by secondary air and preventing external air from being moist.
The porous water absorbing layer 13 is a porous material layer, such as porous fiber or metal felt, and there are many fixing modes of the porous water absorbing layer 13, for example, the porous water absorbing layer 13 can be adhered to the inner wall of the vertical heat exchange tube 301, a spring 15 for pressing the porous water absorbing layer 13 against the inner wall of the vertical heat exchange tube 301 can be arranged inside each vertical heat exchange tube 301, the surface of the spring 15 is treated by using super-hydrophilic material, the spring 15 not only plays a role in pressing the porous water absorbing layer 13, but also plays a role in disturbing flow, increases the heat exchange area, and promotes the heat and moisture exchange between air and water.
In addition, the vertical heat exchange tube 301 can also be a prefabricated integrated heat exchange tube with a porous water absorption layer 13 on the inner surface.
The vertical heat exchange tubes 301 are round tubes or oval tubes, and the arrangement mode of the vertical heat exchange tubes is in a forward row or a fork row. The heat exchange tubes are arranged in parallel, so that the heat exchange tubes have the advantages of small resistance and easy cleaning; the heat exchange tube fork rows are arranged to enhance the disturbance of the fluid, and the heat transfer coefficient is larger.
The vertical heat exchange tube 301 is a heat exchange tube made of a metal material or a non-metal material, and may be a copper tube or a PVC tube.
The working process of the tubular dew point indirect evaporative cooling air conditioner comprises the following steps:
working process of air treatment in summer: fresh air enters through the air inlet 1, passes through the outer surface of the heat exchange tube 3 after passing through the air feeder 2 and exchanges heat with secondary air and water in the tube, a part of cooled air is used as air supply and flows out through the air supply outlet 4 on the right side of the air conditioner, at the moment, the temperature of the air supply approaches the dew point temperature of the air inlet, and as the air supply outlet 4 is communicated with the secondary air inlet chamber 16, the other part of cooled air can enter the secondary air inlet chamber 16 as secondary air, then enters the heat exchange tube set 3 from the bottom of the heat exchange tube set 3, flows out from the water baffle 8 from bottom to top, and is exhausted to the outside through the air outlet 10 by.
In the transition season, when the outdoor meteorological conditions meet the requirements, the full fresh air is operated. Fresh air enters the air conditioner through the air inlet 1, is sent to the indoor through the air supply outlet 4 through the outer surface of the heat exchange tube 3 by the air supply machine 2.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a tubular dew point indirect evaporative cooling air conditioner which characterized in that: the heat exchange tube set comprises a shell, a heat exchange tube set (3) and a water distribution system, wherein an air outlet (10) is formed in the top of the shell, an air inlet (1) and an air outlet (4) are formed in two sides of the middle of the shell, an exhaust fan (9) and an air feeder (2) are respectively arranged in the shell close to the air outlet (10) and the air inlet (1), the heat exchange tube set (3) and the water distribution system are both arranged in the shell, the heat exchange tube set (3) comprises a plurality of vertical heat exchange tubes (301) with transverse fins (14) outside, a porous water absorption layer (13) is arranged on the inner surface of each vertical heat exchange tube (301) from top to bottom, the water distribution system comprises a spraying device arranged at the top of the heat exchange tube set (3) and a circulating water tank (5) arranged at the bottom of the heat exchange tube set (3), the circulating water tank (5) is connected with the spraying device through a pipeline, and a circulating, the spraying device comprises a plurality of horizontally arranged water distribution pipes (7), a plurality of vertical spraying pipes (12) are uniformly distributed on each water distribution pipe (7), the water outlet end of each spraying pipe (12) vertically extends into the upper end part of the corresponding vertical heat exchange pipe (301), the upper end and the lower end of the heat exchange pipe set (3) are fixed in the shell through a porous plate (17), sleeve holes (18) of the two porous plates (17) are in one-to-one correspondence with the vertical heat exchange pipes (301), and a secondary air inlet chamber (16) is formed between the porous plate (17) at the lower part and the circulating water tank (5); the air supply outlet (4) is communicated with the secondary air inlet chamber (16); the transverse ribs (14) have different sizes at the corresponding vertical heat exchange tubes (301) according to the heat exchange degree of the cooling air conditioner, and the size of the transverse rib (14) at the position with high heat exchange strength is smaller than that of the transverse rib (14) at the position with low heat exchange strength;
the porous water absorption layer (13) is a porous material layer; directly spraying circulating water on the porous material in the heat exchange tube;
the evaporative cooling air conditioner also comprises a water baffle (8), and the water baffle (8) is arranged in the shell and close to the exhaust fan (9);
a spring (15) used for pressing the porous water absorption layer (13) on the inner wall of each vertical heat exchange tube (301) is arranged in each vertical heat exchange tube (301);
the surface of the spring is treated by super-hydrophilic materials.
2. The tubular dew point indirect evaporative cooling air conditioner of claim 1, wherein: the porous water absorption layer (13) is attached to the inner wall of the vertical heat exchange tube (301).
3. The tubular dew point indirect evaporative cooling air conditioner of claim 1, wherein: each vertical heat exchange tube (301) adopts a heat exchange tube with an integrated porous water absorption layer (13) prefabricated on the inner side surface.
4. The tubular dew point indirect evaporative cooling air conditioner of any one of claims 1 to 3, wherein: the vertical heat exchange tube (301) is a circular tube or an elliptical tube.
5. The tubular dew point indirect evaporative cooling air conditioner of claim 4, wherein: the arrangement mode of the vertical heat exchange tubes (301) is in a row or in a fork row.
6. The tubular dew point indirect evaporative cooling air conditioner of claim 5, wherein: the transverse ribs (14) are round or flat ribs.
7. The tubular dew point indirect evaporative cooling air conditioner of claim 6, wherein: the vertical heat exchange tube (301) is a metal heat exchange tube or a nonmetal heat exchange tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810437329.2A CN108826539B (en) | 2018-05-09 | 2018-05-09 | Tubular dew point indirect evaporative cooling air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810437329.2A CN108826539B (en) | 2018-05-09 | 2018-05-09 | Tubular dew point indirect evaporative cooling air conditioner |
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| CN108826539A CN108826539A (en) | 2018-11-16 |
| CN108826539B true CN108826539B (en) | 2020-05-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102539454B1 (en) * | 2021-06-08 | 2023-06-01 | 강주빈 | Heat exchange apparatus for odor removing system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112530666B (en) * | 2020-11-16 | 2021-10-19 | 浙江德通变压器有限公司 | High heat dissipation dry-type transformer |
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| CN203518100U (en) * | 2013-09-29 | 2014-04-02 | 西安工程大学 | Vertical tube type indirect evaporative cooling air conditioner |
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| CN101329104B (en) * | 2008-07-14 | 2011-07-27 | 西安工程大学 | Square porous ceramic vertical tube type dew point indirect evaporative cooler |
| AU2013200025A1 (en) * | 2012-01-04 | 2013-07-18 | Seeley International Pty. Ltd. | Improved Efficiency Indirect Evaporative Cooler |
| CN203628889U (en) * | 2013-11-14 | 2014-06-04 | 西安工程大学 | Recirculating dew-point and stand pipe composite indirect evaporative cooling air conditioning unit |
| CN106091488A (en) * | 2016-08-01 | 2016-11-09 | 郑州大学 | Fin-tube type indirect evaporation air cooler |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203518100U (en) * | 2013-09-29 | 2014-04-02 | 西安工程大学 | Vertical tube type indirect evaporative cooling air conditioner |
Non-Patent Citations (1)
| Title |
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| 冷却器结构及样机实验测试;曹璇;《小型板式逆交叉流露点间接蒸发冷却器性能的实验研究》;20170801;正文22-23页、附图3-1，3-,2 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102539454B1 (en) * | 2021-06-08 | 2023-06-01 | 강주빈 | Heat exchange apparatus for odor removing system |
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