CN101761997B - Countercurrent dew point indirect evaporative cooler - Google Patents
Countercurrent dew point indirect evaporative cooler Download PDFInfo
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- CN101761997B CN101761997B CN 201010033817 CN201010033817A CN101761997B CN 101761997 B CN101761997 B CN 101761997B CN 201010033817 CN201010033817 CN 201010033817 CN 201010033817 A CN201010033817 A CN 201010033817A CN 101761997 B CN101761997 B CN 101761997B
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- dew point
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Abstract
The invention discloses a countercurrent dew point indirect evaporative cooler, which comprises a dew point cooling machine core and a water supply and water distribution device, wherein the dew point cooling machine core is formed by parallelly stacking one or more cooling units in turn; each cooling unit comprises three parallel airflow channels which are respectively an airflow channel for primary air, a dry-side airflow channel for secondary air and a wet-side airflow channel for secondary air in turn, wherein the rear end of the dry-side airflow channel is provided with a baffle plate; the front and rear ends of the wet-side airflow channel are provided with baffle plates; a middle interlayer at the front end of the wet-side airflow channel is provided with a rectangular exhaust channel; a heat exchange clapboard between the airflow channel for the primary air and the dry-side airflow channel is provided with a perforation; and a nozzle is positioned in the exhaust channel close to the baffle plate at the front end of the wet-side airflow channel and faces the inside of the wet-side airflow channel. Water vapor in the wet-side airflow channel and the primary air in the neighboring channel perform countercurrent heat exchange, so the countercurrent dew point indirect evaporative cooler has the characteristics of high efficiency and environmental protection.
Description
Technical field
The invention belongs to air-conditioning technical field, be specifically related to a kind of principle of utilizing air inversion heat exchange and water evaporation for cooling and produce indirect evaporative cooling device near the dew-point temperature air.
Background technology
Along with environmental pollution increasingly sharpens, the carbon discharge capacity is high, and people more pay close attention to energy consumption.Building energy consumption can account for 30% of social total energy consumption according to statistics, and the proportion of the energy consumption on heating and the air-conditioning in building energy consumption is more up to 55%.In the face of this Environment and energy problem increasingly severe situation, in the urgent need to developing more energy-saving and environmental protection and Eco-power heating air conditioning equipment.
Existing devaporizer mainly contains direct evaporative cooler and indirect evaporation cooler.Direct evaporative cooler can be cooled to its wet-bulb temperature to air, and indirect evaporation cooler can be cooled to air near its wet-bulb temperature, and the cooling scope is less.Several dew point indirect evaporative coolers have also appearred recently, a kind of is to utilize at least two single-stage indirect evaporation coolers to be cascaded, the direct wind outlet of upper level single-stage indirect evaporation cooler heat exchanger is connecting the direct wind inlet of next stage single-stage indirect evaporation cooler heat exchanger by the air channel, the bottom of upper level single-stage indirect evaporation cooler heat exchanger is told the autonomous channel and is being connected the indirect wind inlet in next stage single-stage indirect evaporation cooler heat exchanger bottom, realizes that finally the cooler outlet air themperature is near its dew-point temperature; Other dew point indirect evaporative coolers all are the principles of utilizing cooler internal gas flow cross flow one, be that air enters cooler, part air-flow enters the secondary gas flow passage through perforation, first and second gas channel square crossing is arranged, utilize the water in two subchannels to evaporate to cool off air-flow one time, the result realizes that outlet air temperature is near the purpose of its dew-point temperature.The dew point efficient that is existing dew point indirect evaporative cooler is on the low side, the highlyest also only reaches 77%.The present invention proposes a kind of principle of countercurrent flow, step-by-step movement cooling of utilizing and reach the devaporizer that approaches air dew point, structure is simpler, and efficient is higher.
Summary of the invention
Order of the present invention provides a kind of large cooling that both realized, also has the devaporizer of higher dew point efficient.
Particular content of the present invention is: a kind of countercurrent dew point indirect evaporative cooler, comprise dew point cooling movement and water supply and water-distributing device, wherein dew point cooling movement by 1 or 1 with upper cooling cell body successively stacked side by side forming, each cooling unit body comprises three side by side parallel gas channels, respectively the primary air gas channel successively, the dried sidewind passage of auxiliary air and the auxiliary air sidewind passage that wets, each gas channel is the same rectangular channel of sectional dimension, wherein there is baffle plate the rear end of the dried sidewind passage of auxiliary air, there is baffle plate the rear and front end of the wet sidewind passage of auxiliary air, and have the air exhaust passage of rectangle at the intermediate interlayer of the wet sidewind passage front end of auxiliary air, the heat exchange dividing plate between primary air gas channel and the dried sidewind passage of auxiliary air has perforation; Water supply wherein and water-distributing device include water pump, tank, water distributor, nozzle, water valve, water pipe, and wherein nozzle is arranged in the wet sidewind passage of auxiliary air near the air exhaust passage of front end-stopping plate, and nozzle is in the wet sidewind passage of auxiliary air.Water pump provides power, water sucking-off from tank, deliver to the nozzle place by water pipe, the wet sidewind passage of the corresponding auxiliary air of each nozzle, be in baffle plate 6 back of the wet sidewind passage front end of auxiliary air, water goes to the wet sidewind passage of auxiliary air the inside by nozzle ejection.
The heat exchange dividing plate of dew point cooling movement of the present invention is made with plastic plate, sheet metal and the fibrous paper of 0.1mm～0.3mm; Intermediate interlayer is made with plastic plate, sheet metal and fibrous paper, but thickness is not had special requirement.
Dew point cooling movement becomes 3 °-5 ° angle with horizontal plane, make the wet sidewind passage of the wetting whole auxiliary air of water energy.
The quantity of perforation is 4-8, and strengthens gradually along the dried sidewind flow direction of auxiliary air spacing.
Thereby nozzle adopts atomizer to make the particle water of ejection very little and can evenly enter the wet sidewind passage of auxiliary air.
The wet sidewind channel inner surface of auxiliary air is coated with hydroaropic substance.Because the existence of hydroaropic substance, not only strengthened the effect of water evaporation, guarantee simultaneously that in-channel water is difficult for forming current and exist mainly with the form of moisture film.
The countercurrent dew point indirect evaporative cooler that the present invention proposes is to utilize the dry-bulb temperature of air and the difference of the continuous wet-bulb temperature that reduces to come heat exchange, the dry-bulb temperature of final outlet air 13 is lower and near its dew-point temperature than the wet-bulb temperature of inlet air 12, and water capacity does not change.Cooler is to obtain wet-bulb temperature difference, air-flow that water capacity is identical by perforation; Realize cooling off by evaporation of water; By the heat exchange dividing plate cold is passed.
The present invention has following beneficial effect:
(1) in order to make the wet-bulb temperature of the identical auxiliary air of original state through perforation the time different, cooler is interior along airflow direction, heat exchange dividing plate between the dried sidewind passage of auxiliary air and the wet sidewind passage of auxiliary air has a series of apertures (having 5 apertures in the experiment), bore dia is between 3mm～4mm, enlarge gradually along the distance between the dried sidewind flow direction of the auxiliary air aperture, make like this air-flow that the enters next perforation longer distance of passing by, make its wet-bulb temperature lower.Thereby strengthened heat transfer temperature difference between the wet sidewind of primary air and auxiliary air, improved heat transfer efficiency.
(2) by atomizer water can effectively be evaporated, by guaranteeing that with the angle that makes the cooler movement horizontal by 3～5 ° whole wet channel is all by water-wet at wet channel inwall coating hydroaropic substance.Thereby guarantee disengagement area and evaporated quantity of water.
(3) in order to make the more effective heat exchange of heat exchange dividing plate both sides energy, it all is reverse flow that the present invention makes between the air-flow, comprise the dried sidewind of auxiliary air and the auxiliary air wet sidewind of sidewind, primary air air-flow and auxiliary air that wets, given full play to like this countercurrent flow than other form heat exchange more efficient advantage all
Below in conjunction with description of drawings and the specific embodiment the present invention is described in further detail.
Description of drawings
Fig. 1 cooler overall structure figure---wet channel place longitudinal profile schematic diagram;
Fig. 2 cooler one cell cube structural representation;
Fig. 3 cooler one planar structure schematic diagram;
Fig. 4 cooler cassette mechanism structure schematic diagram;
Among the figure: 1, tank, 2, water valve, 3, water pump, 4, water-supply-pipe, 5, horizontal water distributor, 6, baffle plate, 7, vertical water distributor, 8, nozzle, 9, air exhaust passage, 10, perforation, 11, the cooler movement, 12, air intake, 13, air-out, 14, air draft, 15, the heat exchange dividing plate, 16, intermediate interlayer, 17, the primary air gas channel, 18, the dried sidewind passage of auxiliary air, 19, the wet sidewind passage of auxiliary air, 20, primary air, 21, auxiliary air.
The specific embodiment:
The present invention uses two media, and one is water, and one is air.Flowing of water enters water pipe by tank 1, enters in the water pump 3 through water valve 2, pumps into water-supply-pipe 4 by water pump, then enter horizontal water distributor 5, all assign to vertical water distributor 7 from horizontal water distributor again, spray into wet channel finally by nozzle 8, do not have the part water droplet of spirt wet channel to drop into tank.A water part that enters in the wet channel exists with the form of water smoke, and a part is caught wetting whole wet channel inwall by hydroaropic substance.
Flowing of air at first is that air intake 12 is divided into two, and a part is as primary air 20, and another part is as auxiliary air 21, and primary air is 1.5: 1 with the ratio of auxiliary air.Auxiliary air 21 through 10 entering the wet sidewind passage 19 of auxiliary air through boring a hole behind the auxiliary air dried sidewind passage 18, has the water that comes by nozzle 8, and be coated with hydroaropic substance in passage first in the wet sidewind passage 19 of auxiliary air.Water in the wet sidewind passage 19 of auxiliary air and auxiliary air carries out the caloic exchange, cool off the primary air 20 in the septal canal, cooled primary air 13 outputs to indoor, and the auxiliary air that exchanges through caloic is discharged from as the exhaust passage 9 of exhaust 14 through the cooler front end.And auxiliary air is cooled off by step-by-step movement after entering the dried sidewind passage 18 of auxiliary air, namely take a step forward forward just by darker cooling once, thereby more to the back, it is lower to enter preperforative gas flow temperature, because its water capacity does not change, so the wet-bulb temperature of air-flow is also just more and more lower, finally make the wet-bulb temperature of the air-flow that passes last row's perforation near the dew-point temperature of air intake 12.Specifically such: auxiliary air enters the dried sidewind passage 18 of auxiliary air, first but clammy by the water evaporation endothermic in the wet channel of next door etc. before arriving first perforation, the water that secondary gas flow enters in the rear reverse flow of first perforation and the wet channel carries out the mass transfer heat exchange, the primary air in cooling next door; Auxiliary air flows forward along dried sidewind passage and flows to second perforation place by first perforation place, air-flow is constantly but clammy by the wet channel in next door etc. again in this process, so that air-flow passes the wet-bulb temperature in second when perforation is lower, secondary gas flow enters wet channel through second perforation adverse current and carries out the heat that evaporative cooling absorbs the next door primary air, so that the primary air temperature is lower; Same auxiliary air continues to flow forward along dried sidewind passage, when arriving the 3rd perforation place, to compare temperature lower with the auxiliary air of second perforation place, water capacity is constant, thereby can obtain lower gas flow temperature after entering the 3rd perforation, the temperature that is cooled of the primary air in next door is also lower like this; Auxiliary air continues to flow successively through the 4th, the 5th perforation forward along dried sidewind passage, and same evaporative cooling process occurs.Whole process gets off to make the dry-bulb temperature of primary air air-out 13 near the dew-point temperature of air intake 12.
The present invention carries out heat exchange by the primary air in the evaporation of the water in the wet channel and the septal canal, and air stream and primary air flows in the wet channel are the adverse current form, so heat exchange efficiency is high, the used cold-producing medium of cooler is water in addition, comparatively environmental protection, thereby the cooler outstanding behaviours is the characteristics of efficient, energy-conservation and environmental protection.Through overtesting, this cooler wet bulb efficient reaches 121%, and dew point efficient reaches 84%, and system COP reaches 9.4.The present invention can be widely used in humidity area in China.
Claims (8)
1. countercurrent dew point indirect evaporative cooler, comprise dew point cooling movement and water supply and water-distributing device, it is characterized in that described dew point cooling movement (11) by 1 or 1 with upper cooling cell body successively stacked side by side forming, each cooling unit body comprises three side by side parallel gas channels, respectively primary air gas channel (17) successively, the dried sidewind passage of auxiliary air (18) and the auxiliary air sidewind passage (19) that wets, each gas channel is the same rectangular channel of sectional dimension, wherein there is baffle plate the rear end of the dried sidewind passage of auxiliary air (18), there is baffle plate the rear and front end of the wet sidewind passage (19) of auxiliary air, and have the air exhaust passage (9) of rectangle at the intermediate interlayer (16) of wet sidewind passage (19) front end of auxiliary air, the heat exchange dividing plate (15) between primary air gas channel (17) and the dried sidewind passage of auxiliary air (18) has perforation (10); Described water supply and water-distributing device include water pump (3), tank (1), water distributor (7), nozzle (8), water valve (2), water pipe (4), wherein nozzle (8) is arranged in the wet sidewind passage (19) of auxiliary air near the air exhaust passage (9) of front end-stopping plate, and nozzle is in the wet sidewind passage of auxiliary air.
2. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that described heat exchange dividing plate (15) makes with plastic plate, sheet metal and the fibrous paper of 0.1mm～0.3mm.
3. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that described dew point cooling movement (11) becomes 3 °-5 ° angle with horizontal plane.
4. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that described perforation (10) strengthens gradually along the dried sidewind flow direction of auxiliary air spacing.
5. a kind of countercurrent dew point indirect evaporative cooler according to claim 1, the quantity that it is characterized in that described perforation (10) are 4-8.
6. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that described nozzle (8) adopts atomizer.
7. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that wet sidewind passage (19) inner surface of described auxiliary air is coated with hydroaropic substance.
8. a kind of countercurrent dew point indirect evaporative cooler according to claim 1 is characterized in that described intermediate interlayer (16) makes with plastic plate, sheet metal and fibrous paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010033817 CN101761997B (en) | 2010-01-08 | 2010-01-08 | Countercurrent dew point indirect evaporative cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010033817 CN101761997B (en) | 2010-01-08 | 2010-01-08 | Countercurrent dew point indirect evaporative cooler |
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| Publication Number | Publication Date |
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| CN101761997A CN101761997A (en) | 2010-06-30 |
| CN101761997B true CN101761997B (en) | 2013-01-16 |
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| CN 201010033817 Expired - Fee Related CN101761997B (en) | 2010-01-08 | 2010-01-08 | Countercurrent dew point indirect evaporative cooler |
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Families Citing this family (13)
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| CN103245017B (en) * | 2013-04-12 | 2016-01-13 | 西安工程大学 | The off-premises station of enclosed distributary plate wing dew point indirect evaporative cooling |
| CN103776118B (en) * | 2014-02-19 | 2017-01-04 | 天津大学 | A kind of air conditioner used in kitchen |
| CN104864530A (en) * | 2015-05-20 | 2015-08-26 | 陈明标 | Precooling convection type evaporative refrigeration core unit |
| CN105222260B (en) * | 2015-11-10 | 2017-12-26 | 上海理工大学 | The modular evaporation-cooled device that dry and wet passage combines |
| CN105571032A (en) * | 2016-02-17 | 2016-05-11 | 陈明标 | Inserting-tube-type dew-point evaporation core body |
| CN106091201A (en) * | 2016-07-27 | 2016-11-09 | 陈明标 | A kind of convection type dew point evaporation core body |
| CN106403112A (en) * | 2016-10-29 | 2017-02-15 | 祝大顺 | Reverse backflow type indirect evaporative cooling water chilling unit |
| CN106989459B (en) * | 2017-03-03 | 2020-11-17 | 西安工程大学 | Counter-flow dew point indirect evaporative cooling air conditioning unit |
| CN107606721B (en) * | 2017-10-27 | 2022-12-30 | 林斯茂 | Multifunctional air treatment device for refrigerating in summer and preheating and humidifying air in winter |
| CN109489152A (en) * | 2018-09-25 | 2019-03-19 | 安徽科恩新能源有限公司 | A kind of composite energy accumulated system based on earth source heat pump Yu the accumulation of energy of multi-groove type water |
| CN111773890A (en) * | 2020-06-29 | 2020-10-16 | 南京航空航天大学 | Solar regeneration solution dehumidification system and method based on electrowetting |
| CN112923754A (en) * | 2021-01-28 | 2021-06-08 | 西安交通大学 | Air cooling tower based on dew point indirect evaporation precooling and working method thereof |
| CN115247850B (en) * | 2022-07-26 | 2023-04-18 | 成都雅思欧科技有限公司 | Dew point evaporation indirect cooling type air conditioner |
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| US6845629B1 (en) * | 2003-07-23 | 2005-01-25 | Davis Energy Group, Inc. | Vertical counterflow evaporative cooler |
| CN101078542A (en) * | 2007-06-05 | 2007-11-28 | 西安工程大学 | Dew point plate type indirect evaporation cooler |
| CN101329104A (en) * | 2008-07-14 | 2008-12-24 | 西安工程大学 | Square porous ceramic vertical tube type dew point indirect evaporative cooler |
| CN201187919Y (en) * | 2008-04-14 | 2009-01-28 | 西安工程大学 | Porous ceramic plate fin type indirect evaporative cooler |
| CN101464103A (en) * | 2007-12-19 | 2009-06-24 | 于向阳 | Counterflow indirect evaporative cooler |
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2010
- 2010-01-08 CN CN 201010033817 patent/CN101761997B/en not_active Expired - Fee Related
Patent Citations (6)
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| US6338258B1 (en) * | 2001-01-17 | 2002-01-15 | Korea Institute Of Science And Technology | Regenerative evaporative cooler |
| US6845629B1 (en) * | 2003-07-23 | 2005-01-25 | Davis Energy Group, Inc. | Vertical counterflow evaporative cooler |
| CN101078542A (en) * | 2007-06-05 | 2007-11-28 | 西安工程大学 | Dew point plate type indirect evaporation cooler |
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| CN101329104A (en) * | 2008-07-14 | 2008-12-24 | 西安工程大学 | Square porous ceramic vertical tube type dew point indirect evaporative cooler |
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| CN101761997A (en) | 2010-06-30 |
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