CN206638069U - Indirect evaporation heat exchanger and its cooling tower - Google Patents
Indirect evaporation heat exchanger and its cooling tower Download PDFInfo
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- CN206638069U CN206638069U CN201720045338.8U CN201720045338U CN206638069U CN 206638069 U CN206638069 U CN 206638069U CN 201720045338 U CN201720045338 U CN 201720045338U CN 206638069 U CN206638069 U CN 206638069U
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Abstract
A kind of indirect evaporation heat exchange process and its heat exchanger and the application on cooling tower, the cooling tower include：Air draft hydrostatic portion, evaporation shower portion, heat exchange section and the water circulation part for being arranged at the air draft mechanism at top and being from top to bottom set in turn in tower, wherein：Water circulation part is connected with evaporation shower portion and provides spray-water, and the output end of air draft hydrostatic portion is connected with air draft mechanism, and input is connected with heat exchange section, and the input of heat exchange section receives fresh air；Leaving water temperature of the present utility model has the advantages of low water consumption, modularized design close to outdoor air dew point.Lower leaving water temperature can be obtained with lower water consumption.
Description
Technical field
The utility model relates to a kind of technology of evaporation cooling field, is specifically a kind of based on indirect evaporation and direct
The heat exchange process of evaporative cooling principle and its application method on cooling tower.
Background technology
Vaporation-type cooling technology mainly has both of which at present, is direct evaporating-cooling and indirect evaporating-cooling respectively.Directly
Connect formula evaporation cooling to have been obtained for being widely applied, be included on Fresh air handling units, cooling tower and other evaporative type coolers.From
For technical standpoint, limit air-out/coolant-temperature gage of direct evaporating-cooling is outdoor wet-bulb temperature.In order to realize as far as possible high wet bulb
Efficiency (air-out/coolant-temperature gage close to wet-bulb temperature), domestic and international scientific research institutions have carried out substantial amounts of research to this, in particular for changing
In terms of the enhancing that hot device caloic exchanges；Indirect evaporation refrigerating technology is a kind of new evaporation cooling process proposed in recent years, its
Theoretic minimum water outlet/air temperature is outdoor dew-point temperature.For the direct evaporating-cooling technology that compares, go out because its is minimum
The lower advantage of wind/coolant-temperature gage, its application prospect are quite varied.It is high-performance heat exchanger to influence the main reason for it is widely used
Difficult design, manufacture it is complicated, it is necessary to technical merit and cost it is higher.
It is outdoor typically by motor driving blower fan suction outdoor air at present in existing cooling tower work running
Air flows through porous aggregate and exchanged with water drenching generation caloic, after water temperature is reduced in zone of reasonableness, will be cooled down by water circulating pump
Water afterwards is delivered to user terminal.This directly evaporation technique is widely used in cooling down in Deethanizer design.Although substantial amounts of research carries
Different design methods is gone out and has carried out Curve guide impeller, but its theoretical minimum temperature can not but be dashed forward for the limit of wet-bulb temperature
It is broken.For the angle of efficiency, if air-out/coolant-temperature gage can be made to improve cooled equipment first close to outdoor dew-point temperature
Efficiency, secondly low air-out/coolant-temperature gage can partly or entirely substitute cooling load, so as to greatly reduce the synthesis energy of equipment
Consumption.
However, although what is be widely used at present disclosure satisfy that groundwork needs based on direct vaporization cycle cooling tower,
But due to the inherent shortcoming that efficiency is relatively low, water consumption is big, the following requirement to cooling device high energy efficiency can not be met.
Utility model content
The utility model uses direct evaporating-cooling traditional cooling tower for existing, and water outlet/air temperature of its limit is
Outdoor wet-bulb temperature, and water consumption is larger；And novel improved structure then uses at least two heat exchangers, although water outlet/air temperature
Outdoor wet-bulb temperature can be less than, but because the low temperature and high relative humidity air after cooled is expelled directly out, air-flow first can be caused
In the globule can not be efficiently separated and be pulled away and while energy more too fat to move with double cross-flow heat exchanger structures converts
The defects of rate is relatively low.A kind of indirect evaporation heat exchanger and its cooling tower are proposed, its leaving water temperature has close to outdoor air dew point
There is the advantages of low water consumption, modularized design.Lower leaving water temperature can be obtained with lower water consumption.
The utility model is realized based on following thermodynamics flow：
A kind of heat exchanger is the utility model is related to, if being made up of the superposition of dried layer heat exchange unit, every layer of heat exchange unit is each other
Two heat exchange diaphragms that mirror image is set, the inner side of the first heat exchange diaphragm and the second heat exchange diaphragm in each heat exchange unit is along air intake
Direction includes successively：Air exhaust passage, indirect evaporation wet channel positioned at head end and the direct evaporation channel positioned at end, adjacent two
The outside of first heat exchange diaphragm of individual heat exchange unit and the second heat exchange diaphragm is corresponding in turn to composition along air intake direction：Fresh air channel,
Indirect evaporation dry passage and direct evaporation channel, the heat exchange diaphragm connection between indirect evaporation dry passage and direct evaporation channel
Part forms static air pressure chamber.
The present apparatus is exchanged heat in the following manner：Outdoor fresh air enters fresh air channel after filter, with the row of flowing through
Distributary sensible heat heat exchange occurs for low temperature, the highly humid air of wind passage.Fresh air after cooled enters indirect evaporation dry passage, in quilt
Air in indirect evaporation wet channel etc. it is clammy but after, a part pass through first heat exchange diaphragm return air inlet and second heat exchange diaphragm return
Air port respectively enters the indirect evaporation wet channel of both sides, another part by etc. it is clammy but after air then flow into static air pressure chamber.
Into indirect evaporation wet channel air then by shower humidification, while cool down the air of diaphragm opposite side.Air inlet static pressure chamber
By etc. it is clammy but after air after static pressure intracavitary is decelerated diffusion static pressure improve, be on the one hand advantageous to air and be uniformly distributed in
Each direct evaporation channel, on the other hand can prevent water to be inversely diffused into indirect evaporation dry passage.Simultaneously because the first heat exchange
The direct evaporating surface of diaphragm and second heat exchange the direct evaporating surface of diaphragm be it is porous or fluting convoluted diaphragm, so air pressure
It can directly be balanced well in each directly evaporation channel, so that it is guaranteed that sufficiently utilizing heat exchanger heat exchange area.From
The air of the close outdoor dew-point temperature of static air pressure chamber outflow is further cooled down after entering direct evaporation channel by shower humidification,
The water temperature of shower water is also chilled near outdoor dew-point temperature simultaneously.
A kind of cooling tower is the utility model is related to, including：It is arranged at the air draft mechanism at top and from top to bottom sets successively
Air draft hydrostatic portion, evaporation shower portion, heat exchange section and the water circulation part being placed in tower, wherein：Water circulation part
Be connected with evaporation shower portion and spray-water be provided, the output end of air draft hydrostatic portion is connected with air draft mechanism, input and
Heat exchange section is connected, and the input of heat exchange section receives fresh air.
Technique effect
Compared with prior art, the utility model can obtain the lower leaving water temperature of temperature；Further, since take heat
Recovery process, the utility model can reduce about 30% than the water consumption of existing indirect evaporation flow；3rd, due to using
Plastic film with tongue and groove is superimposed the air and water flow passage to form difference in functionality, and the utility model is compact-sized and space utilization
Rate is high, is adapted to scale of mass production to promote.
Brief description of the drawings
Fig. 1 is prior-art illustration；
A is overall diagram in figure；B is close-up schematic view；
Fig. 2 is the utility model thermodynamics flow；
Fig. 3 is the utility model cooling tower schematic diagram；
Fig. 4 is cooling tower procedure decomposition schematic diagram in embodiment 1；
Fig. 5 is refrigeration system COP in embodiment 1 with the change of condensation temperature, 5 degree of evaporating temperature schematic diagrames；
Fig. 6 is recuperation of heat, indirect evaporating-cooling, direct evaporating-cooling integral heat exchanger diagrammatic cross-section in embodiment 2；
Fig. 7 is the relation schematic diagram of wet bulb efficiency, dew point efficiency and inlet velocity；
Fig. 8 is the direct evaporator section performance curve of the utility model cooling tower；
In figure：Air draft mechanism 1, indirect evaporation shower water section 2, directly evaporation shower water section 3, direct evaporating heat exchanger are (wet
Formula cool down) 4, water circulating pump 5, the first collect cavity 6, directly evaporate air draft/mouth of a river 7, the indirect evaporation air draft/mouth of a river 8, cooling water pump
9th, cooling water water outlet 10, cooling water backwater 11, the second collect cavity 12, new wind filter 13, diaphragm type indirect evaporation heat exchanger 14,
Fresh air-air exhaust heat exchange device 15, air draft static pressure chamber 16, air exhaust passage 17, indirect evaporation wet channel 18, indirect evaporation dry passage 19,
Static air pressure chamber 20, direct evaporation channel 21, the heat exchange heat exchange diaphragm 24, first of diaphragm 23, second of fresh air channel 22, first exchange heat
The heat exchange heat exchange diaphragm of diaphragm first convex 26, first return air inlet the 27, the second heat exchange diaphragm return air inlet of diaphragm first recessed 25, second
28th, the direct heat exchange diaphragm of evaporating surface 30, the second side air inlet of the direct heat exchange of evaporating surface 29, first diaphragm of the second heat exchange diaphragm
31st, first heat exchange diaphragm side the first bending of air inlet the 32, first heat exchange diaphragm the 34, second heat exchange diaphragm of the first bending 35, first
Exchange heat the heat exchange heat exchange diaphragm of diaphragm second convex 37, first second bending the 38, the second heat exchange diaphragm of diaphragm second recessed 36, first
Second bending 39.
Embodiment
As shown in figure 3, being the present embodiment cooling tower structure, specifically include：It is arranged at the air draft mechanism 1 at top and by upper
Air draft hydrostatic portion, evaporation shower portion, heat exchange section and the water circulation part being set in turn under and in tower, wherein：
Water circulation part is connected with evaporation shower portion and provides spray-water, output end and the phase of air draft mechanism 1 of air draft hydrostatic portion
Even, input is connected with heat exchange section, and the input of heat exchange section receives fresh air.
Described heat exchange section includes：Horizontal connected fresh air-air exhaust heat exchange device 15, diaphragm type indirect evaporation change successively
Hot device 14 and directly evaporating heat exchanger 4, wherein：The top face air draft hydrostatic portion of fresh air-air exhaust heat exchange device 15, fresh air-
The bottom of air exhaust heat exchange device 15 flows into the low temperature humid air after fully being humidified and flowed out at the top of it, fresh air-air exhaust heat exchange device
15 side is flowed into from outdoor introducing flows out after filtering after new air cooling from right side；The top of direct evaporating heat exchanger 4
Face shower portion, diaphragm type indirect evaporation heat exchanger 14 be located at fresh air-air exhaust heat exchange device 15 and direct evaporating heat exchanger 4 it
Between, what is flowed into its dry passage is the fresh air after being cooled from fresh air-air exhaust heat exchange device 15, clammy but through humid air etc.
Afterwards, the dry air of part low temperature is inversely sucked wet channel and humidified to close to saturation, and with diaphragm opposite side dry passage
Dry air exchange heat after humid air/water output end of diaphragm type indirect evaporation heat exchanger is flowed to along wet channel；Remainder
The dry air divided enters direct evaporating heat exchanger 4 from the dry passage of diaphragm type indirect evaporation heat exchanger 14, with carrying out spontaneous evaporation spray
Partial water occurs together to flow out through the direct bottom of evaporating heat exchanger 4 with shower water after humidified cooling after caloic exchanges, then enters
Enter the first collect cavity upper space, due to the effect of gravity, cooled water is directly entered the first collect cavity, and air then by with
The humid air flowed out from the wet channel of diaphragm type indirect type evaporating heat exchanger 14 together back flows back into fresh air-air exhaust heat exchange device 15
Bottom.
Described evaporation shower portion includes：It is arranged at the indirect evaporation spray at the top of diaphragm type indirect evaporation heat exchanger 14
Water section 2 and the direct evaporation shower water section 3 for being arranged at the direct top of evaporating heat exchanger 4.
Described circulating part point includes：First collect cavity 6 and the second logical collect cavity 12 is attached thereto, wherein：Second
Collect cavity 12 is located at fresh air-air exhaust heat exchange device 15 and indirect evaporation air draft/bottom of the mouth of a river 8, for collect from indirect evaporation air draft/
The unevaporated water that the mouth of a river 8 is taken out of by air-flow, the first collect cavity 6 positioned at directly evaporate the bottom of air draft/mouth of a river 7, for collection from
The unevaporated water that direct evaporating heat exchanger 4 flows out, and the body bottom angled gradient the first collect cavity of slope aspect of the second collect cavity 12
6, so that the water wherein collected can automatically flow into the first collect cavity 6, the first collect cavity is less than the second collect cavity, cooling water
The suction inlet of pump 9 is located at the bottom of the first collect cavity 6.
Described air draft mechanism 1 is that the humid air of recuperation of heat is completed for discharging, and air dry-bulb temperature herein is close to room
External environment temperature, and it is in high water capacity state.
As shown in fig. 6, above-mentioned diaphragm type indirect evaporation heat exchanger 14, if being made up of the superposition of dried layer heat exchange unit, every layer is changed
Two heat exchange diaphragms that hot cell is set for mirror image each other, the first heat exchange diaphragm 23 and second in each heat exchange unit exchange heat film
The inner side of piece 24 includes successively along air intake direction：Positioned at the air exhaust passage 17 of head end, indirect evaporation wet channel 18 and positioned at end
Direct evaporation channel 21, the first heat exchange diaphragm 23 and second of two neighboring heat exchange unit exchange heat diaphragm 24 outside along air intake
Direction is corresponding in turn to composition：Fresh air channel 22, indirect evaporation dry passage 19 and direct evaporation channel 21, indirect evaporation dry passage
Heat exchange diaphragm coupling part between 19 and direct evaporation channel 21 forms static air pressure chamber 20.
Described air exhaust passage 17 and the airflow direction in the direct evaporation channel 21 of end and fresh air channel 22 with
And the air flow direction directly in evaporation channel 21 is perpendicular, indirect evaporation wet channel 18 and the air-flow in indirect evaporation dry passage 19
Flowing is close to countercurrently.
Described air exhaust passage 17 on the first heat exchange heat exchange diaphragm 24 of diaphragm 23 and second by setting symmetrical first folding
Curved 34,35 and first connecting portion (i.e. first heat exchange diaphragm first recessed 25, second exchange heat the first convex 26) of diaphragm simultaneously mutually connect
Press and be tightly achieved.
Described indirect evaporation wet channel 18 is symmetrical by being set on the first heat exchange heat exchange diaphragm 24 of diaphragm 23 and second
(the i.e. first heat exchange diaphragm second recessed 36, first exchanges heat the second convex 37) of diaphragm simultaneously for the first connecting portion and second connecting portion
Contact with each other compression and the return air inlet between first connecting portion and second connecting portion is achieved.
Described indirect evaporation dry passage 19 is exchanged heat by the first heat exchange diaphragm 23 and second of two neighboring heat exchange unit
First connecting portion, second connecting portion and the return air inlet of diaphragm 24 are realized.
The first heat exchange heat exchange diaphragm of diaphragm 23 and second that described static air pressure chamber 20 passes through two neighboring heat exchange unit
24 second connecting portion is realized.
The first heat exchange heat exchange film of diaphragm 23 and second that described direct evaporation channel 21 passes through two neighboring heat exchange unit
The second connecting portion of piece 24, the second bending 38,39 and the directly realization of evaporating surface 29,30.
The first heat exchange heat exchange diaphragm 24 of diaphragm 23 and second that described fresh air channel 22 passes through two neighboring heat exchange unit
The first bending and first connecting portion realize.
Above-mentioned composition air exhaust passage 17, indirect evaporation wet channel 18 and direct evaporation channel 21 and its corresponding fresh air
The both side surface of passage 22, indirect evaporation dry passage 19 and the directly heat exchange diaphragm of evaporation channel 21 is suppressed with ripple, so as to structure
Into enhancing heat exchanger chamber.
The cross sectional shape of described ripple includes but is not limited to triangle, rectangle and trigonometric function ripple.
Exchanged to strengthen the caloic of Air-Water in indirect evaporation wet channel 18, the first heat exchange diaphragm 23 and second exchanges heat
Diaphragm 24 has hydrophily flocking in the inner surface of indirect evaporation wet channel 18.
On described heat exchange diaphragm air is provided with positioned at the end of indirect evaporation dry passage 19 and indirect evaporation wet channel 18
Open-work or groove, for cooled air to be sucked into wet channel.
The direct evaporating surface of described heat exchange diaphragm, which is provided with, is used to balancing the permeable hole of both sides blast and/or permeable
Groove, and water can pass into the both sides of heat exchange diaphragm, make full use of the heat exchange area of heat exchange diaphragm.
As shown in Fig. 2 it is the present apparatus and the thermodynamics flow of existing cooling tower：
The air of existing novel improved construction cooling tower is humidified in the side of indirect evaporation heat exchanger, and state is changed into 4 from 1
State.Opposite side cooled air is changed into 2 states from 1 state, and the minimum value that can reach is 4 to the temperature of 2 states in theory
The dry-bulb temperature of state.2 points of position considers 5K temperature difference of heat exchanger (it is assumed that than 4 dry bulbs of 2 points of dry bulb are high by 5 in this figure
Degree).Then 2 points it is humidified, obtain the air and water of state point 3 (temperature in this legend is 19 degree).
In the present apparatus：1 ' state is cooled to 2 ' states, the minimum temperature that can reach 7 ' states of 2 ' states first.Consider
To heat exchanger 5K the temperature difference (assuming that), 2 ' states are defined in shown position.The air of 2 ' states is further cold by indirect evaporation
But a little 3 ' state is arrived, 3 ' positions of point are determined (it is assumed that being 50% herein) by the dew point efficiency of indirect evaporation heat exchanger.3 ' air quilts
Continue humidification and be cooled to 4 ', so as to obtain the cooling water of 4 ' states.(point 3), leaving water temperature low about 2 compared with flow shown in black line
Degree, water consumption reduce about 30%.
The thermodynamic process occurred in heat exchanger in the present embodiment is divided into three sections, and the priority flowed through according to air is respectively
Heat-recovery section, outdoor fresh air in heat-recovery section by rear high humidity exhaust air with lower temperature with carrying out heat exchange；Next to that indirect evaporation section,
In indirect evaporation section air in heat exchanger with diaphragm dry side by etc. it is clammy but, then a part of cooled air inversely enters
Wet channel is humidified；It is finally direct evaporator section, is adiabatic humidification cooling including air in direct evaporator section；Thermodynamics flow
As shown in Figure 2：The outdoor fresh air of state 1 ' initially enters the heat-recovery section of cooling tower heat exchanger, by etc. wet be cooled to state point
2 ', the air intlet state of hot side is that the air of state 1 ' is cooled to the air of state 2 ' point in heat recovering heat exchanger, separately
Side cold side happens is that the air of state 7 ' is discharged after being heated；The air of state 2 ' subsequently enters indirect evaporation heat exchanger and done
Passage, by etc. the wet air for being cooled to state 3 ', while the air of a part of state 3 ' is sucked into indirect evaporation heat exchanger
Wet channel completes humidification, and state is humidified to 5 ' from 3 ' first, then along close to saturation relative humidity line by dry passage side air
Warming and humidifying is to 6 '；The air of the state of another part 3 ' come out from indirect evaporation heat exchanger is entered in direct evaporating heat exchanger
Humidified again to 4 ' states, while the cold water for obtaining 4 ' states enters water-collecting tray；And the air of 4 ' states and the sky of 6 ' states
The air that gas is mixed to get 7 ' states enters in heat recovering heat exchanger.
As shown in Figure 2, the wet-bulb temperature than outdoor compared with the cooling water that the utility model can obtain 4 ' states, both temperature difference
About 5 degree.
As shown in figure 4, it is the specific workflow of the present apparatus, in figure：
Discharged at a to complete the humid air of recuperation of heat by top exhaust blower through top static pressure chamber.Air dry bulb temperature herein
Spend close to dry-bulb temperature corresponding to outdoor environment temperature.
It is fresh air-air exhaust heat exchange device 15 at b, is a kind of diaphragm type cross flow heat exchanger.Side flowing is fully to be added
Low temperature humid air (coming from indirect evaporation air draft/mouth of a river 8 and directly evaporation air draft/mouth of a river 7) after wet, enters from exchanger base
Enter, top outflow；Opposite side is from the fresh air of outdoor introducing, entered after fresh air filtering and flows into right side outflow from left side.It is outdoor new
Wind undergone on psychrometric chart 1'-2' etc. wet cooling procedure, the Cryogenic air of opposite side undergo since 7' etc. water capacity add
Thermal process.The major function of the cross flow heat exchanger is the sensible heat of abundant recovery Cryogenic air, enters fresh air for cooling down；Secondly
This heat exchanger due to Cryogenic air need from bottom to top flow through heat exchanger channels, be entrained in water in Cryogenic air by with wall
Collision and constantly change direction, heat exchanger can objectively play a part of air draft demister.Heat exchanger can be metal
Or plastic foil plate heat interchanger.In order to effectively reduce small product size, heat exchanger 14 and 15 can be by suppressing on same diaphragm
Different runners realizes both integrated designs；
Enter fresh air-air exhaust heat exchange device 15 after new wind filter 13 at c for outdoor fresh air；
It is fresh air-air exhaust heat exchange device air outlet slit at d；
It is indirect type evaporating heat exchanger 14 at e, is a kind of heat exchanger with diaphragm.Cooled down by fresh air-air exhaust heat exchange device 15
Fresh air afterwards enters the dry passage of indirect type evaporating heat exchanger.By the Cryogenic air of heat exchange diaphragm opposite side it is reverse etc. it is clammy but.
Process on psychrometric chart is 2'-3'.When the dry passage of the air outflow indirect type evaporating heat exchanger after cooled, part low temperature
Air is inversely sucked wet channel (by first heat exchange diaphragm return air inlet the 27, second heat exchange diaphragm return air inlet shown in dotted line in Fig. 6
28), it is humidified to first in wet channel close to saturation, it is contemplated that different humidification efficiencies, it is really humidified on psychrometric chart
To 90%-95% or other relative humidity lines.While the air of the humid air cooling diaphragm opposite side close to saturation, and itself edge
Wet channel flows to wet channel outlet.Process of the air in wet channel is on psychrometric chart close to 3'-5'-6' processes.
The cooled air of the dry passage of outflow indirect type evaporating heat exchanger 14 enters direct evaporating heat exchanger 4, with from
The water generation caloic of directly evaporation shower water section 3 is further humidified after exchanging, and temperature further reduces, the mistake on psychrometric chart
Journey is 3'-4'.After the temperature of shower water is also cooled to 4' simultaneously, into the first collect cavity 6.
Flowed out by the air after further humidification cooling from the direct bottom of evaporating heat exchanger 4 through directly evaporation air draft/mouth of a river 7
When state 4' is denoted as on psychrometric chart, with being flowed from the wet channel of indirect type evaporating heat exchanger 14 through indirect evaporation air draft/mouth of a river 8
The mixing of the humid air in state 6' gone out.Mixed state point 7' depends on both flows.If according to 45% 6'
4'(with 55% is entirely that 1), then can obtain the state point in figure shown in 7' from the air mass flow of fresh wind port entrance.It can be seen that 7'
Temperature and 1' temperature compare, have about 15 degree of the temperature difference.In order to make full use of this portion of energy, 7' air is under
And the upper side for flowing into fresh air-air exhaust heat exchange device, to cool down the outdoor fresh air of opposite side.
Indirect type evaporating heat exchanger 14 is a kind of heat exchanger with diaphragm, is made up of plastic film of the surface with ripple.It is adjacent
Three diaphragms between form a dry air circulation passage and a humid air wet channel, also referred to as dry passage and wet logical
Road.In order to strengthen heat exchange, the surface of plastic film is by hot-forming different ripple.Form the side of two diaphragms of wet channel
Hydrophilic layer is implanted with by flocking technology, there is sprinkler head at the top of wet channel, water soaks whole hydrophilic layer from top to bottom.Dry and wet passage
Between diaphragm have hole and groove in the end of dry air air-out direction.By this some holes and groove, a part flows out from dry passage
Air is inversely sucked adjacent wet channel, and the process of air in humidified and cooling dry passage is completed in wet channel.
It is that direct evaporating heat exchanger is a kind of heat exchanger with diaphragm at f.It is made up of the ripply plastic film of surface band.Its
Air intake is the air-out from heat exchanger 14.Caloic occurs for the air after being cooled down from the shower water at the top of heat exchanger and by heat exchanger 14
Exchange, so as to realize the reduction of water temperature.
Indirect type evaporating heat exchanger 14, fresh air-air exhaust heat exchange device 15 and direct evaporating heat exchanger 4 can pass through same group of film
Piece realizes one-piece construction.Realize one-piece construction be advantageous in that heat exchanger diaphragm can with one-shot forming, be easy to assembling and
Production, and due to eliminating leakage/string wind between heat exchanger, the performance of heat exchanger can be guaranteed.Due to above three
Heat exchanger is plastic foil chip construction, and its feature is that difference can be realized by constructing the cooperation of male and fomale(M＆F) on diaphragm
Air communication channel.
As shown in figure 5, whenever condensation temperature is from when increasing to 40 degree for 20 degree, refrigeration system COP reduces 53%.Namely
Say that condensation temperature often rises once, refrigeration COP will decline 2.65%.If using cooling tower of the present utility model, compare traditional cold
But tower (process as shown in dotted line 1-4 in Fig. 2), refrigeration system COP will rise 13.25%；And than the heating power of aforementioned patent description
Flow (process as shown in dotted line 1-2-3 in Fig. 2) is learned, refrigeration system COP will rise 5.3%.For a typical Trane
For RTWS105 water-cooling screw rod units, COP can increase to 6.07 (with traditional cooling towers comparatively speaking) from 5.36.Freezing
On the premise of amount 355.3kW is constant, inputing power is reduced to 57.5kW from 66.3kW, saves 8.8kWh per hour, equivalent to section
About 2.64 kilograms of coals are per hour.If this energy-saving effect is generalized in the cooling tower of current application, caused economy and environment
Benefit is considerable.
As shown in figure 4, the thermodynamic process occurred in heat exchanger of the present utility model is divided into three sections, flowed through according to air
It is successively heat-recovery section respectively, wherein happens is that outdoor fresh air and by the Exchange of apparent heat between low temperature and high relative humidity air；Steam indirectly
Send out section, air in heat exchanger with diaphragm dry side by etc. it is clammy but, then a part of cooled air inversely enters wet channel
It is humidified；Direct evaporator section, air insulated humidification cooling inside.Thermodynamics flow is as shown above：The outdoor of state 1 ' is new
Wind initially enters the heat-recovery section of cooling tower heat exchanger, by etc. it is wet be cooled to state point 2 ', the hot side in heat recovering heat exchanger
Air intlet state is that the air of state 1 ' is cooled to the air of state 2 ' point, and opposite side cold side happens is that the sky of state 7 '
Gas is discharged after being heated.The air of state 2 ' subsequently enters indirect evaporation heat exchanger dry passage, by etc. the wet state 3 ' that is cooled to
Air, while the air of a part of state 3 ' is sucked into the wet channel of indirect evaporation heat exchanger and completes humidification, state is from 3 ' quilts
While humidification 6 ' are heated to by dry passage side air.The air of the state of another part 3 ' come out from indirect evaporation heat exchanger enters
Enter and humidified again to 4 ' states into direct evaporating heat exchanger, while the cold water for obtaining 4 ' states enters water-collecting tray.And 4 ' shapes
The air that the air of state and the air of 6 ' states are mixed to get 7 ' states enters in heat recovering heat exchanger.
As shown in Fig. 2 air is humidified in the side of indirect evaporation heat exchanger in existing modified cooling tower, state is by 1
It is changed into 4 states.Opposite side cooled air is changed into 2 states from 1 state, and the minimum value that can reach of the temperature of 2 states is 4 shapes
The dry-bulb temperature of state.5K temperature difference of heat exchanger is considered in 2 points of position in this figure (than 4 dry bulbs of 2 points of dry bulb are high 5 degree).So
Afterwards 2 points it is humidified, obtain the air and water of state point 3 (temperature in this legend is 19 degree).And flow of the present utility model is：
1 ' state is cooled to 2 ' states, the minimum temperature that can reach 7 ' states of 2 ' states first.In view of the heat exchanger 5K temperature difference,
2 ' states are defined in shown position.The air of 2 ' states further by indirect evaporating-cooling to point a 3 ' states, point 3 ' positions by
The dew point efficiency of indirect evaporation heat exchanger determines (it is assumed that being 50% herein).3 ' air continue humidification and are cooled to 4 ', so as to
To the cooling water of 4 ' states.Compared with flow shown in black line (point 3), leaving water temperature is low 2 degree.
In addition to proving the feasibility of the thermodynamic (al) flow of the utility model from the flow on psychrometric chart, below from reality
The angle tested illustrates why the utility model can obtain lower leaving water temperature, smaller water consumption.
Air flow description more than, which can be seen that cooling of the utility model to air, can be divided into three phases,
First paragraph be precooling zone, second segment be indirect evaporating-cooling section, the 3rd section be direct evaporating-cooling section.
Precooling zone by outdoor air precooling, reduces its corresponding wet-bulb temperature first.
The outlet air temperature of indirect evaporating-cooling section can be close to the dew-point temperature of inlet condition, according to Zhiyin
Duan, Investigation of a Novel Dew Point Indirect Evaporative Air Conditioning
System for Buildings, (Thesis submitted to the University of Nottingham for
The degree of Doctor of Philosophy, September 2011) in list the wet of indirect evaporation cooler
Ball efficiency, under different application environments, its value changes between 0.71 to 0.989.And dew point efficiency is given in Fig. 7 and is existed
Change between 0.4-0.6.
Direct evaporator section can essentially regard an open cooling tower as, when its intake air temperature is close to outdoor air dew point
During temperature, compared with introducing fresh air directly from environment, its cooling water leaving water temperature can be much lower.Fig. 8 describes a reality
The curve that the leaving water temperature of wet cooling tower changes with air intake wet-bulb temperature, it can be seen that when 21.1 degree of wet bulb air intakes
The corresponding Cold water-out temperature that can obtain 22.2 degree；The cold water that 10 degree of wet bulb air intake can correspondingly obtain 12.8 degree goes out water temperature
Degree.
Implementation 1：When outdoor air is 35 degree of dry bulb, 21.5 degree of wet bulb., can then for traditional wet cooling tower
It it is 22.6 degree with obtained Cold water-out temperature；And for cooling tower of the present utility model, it is assumed that the dew of indirect evaporation heat exchanger
Point efficiency is 0.55, then can obtain 24 degree of dry bulb, the air-out that 18 degree of wet bulb, and the leaving water temperature that can be found from Fig. 8 is
18.5 degree.4.1 degree lower than traditional wet cooling tower temperature.
Implementation 2：When outdoor air is 30 degree of dry bulb, 21.1 degree of wet bulb., can then for traditional wet cooling tower
It it is 22.2 degree with obtained Cold water-out temperature；And for cooling tower of the present utility model, it is assumed that the dew of indirect evaporation heat exchanger
Point efficiency is 0.55, then can obtain dry bulb 23.0, the air-out that 19 degree of wet bulb, and the leaving water temperature that can be found from Fig. 8 is 20
Degree.4.2 degree lower than traditional wet cooling tower temperature.
Example more than can be drawn, bent with reference to the efficacy curve of actual cooling tower and the performance of indirect evaporation heat exchanger
Line, the utility model can obtain the leaving water temperature lower than traditional wet cooling tower.
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the utility model principle and objective with
Different modes carries out local directed complete set to it, and the scope of protection of the utility model is defined by claims and not by above-mentioned specific
Implementation is limited, and each implementation in the range of it is by the constraint of the utility model.
Claims (10)
1. a kind of diaphragm type indirect evaporation heat exchanger, it is characterised in that if being made up of the superposition of dried layer heat exchange unit, every layer of heat exchange is single
Two heat exchange diaphragms that member is set for mirror image each other, the first heat exchange diaphragm and the second heat exchange diaphragm in each heat exchange unit it is interior
Side includes successively along air intake direction：Air exhaust passage, indirect evaporation wet channel positioned at head end and the direct evaporation positioned at end are led to
The outside of road, the first heat exchange diaphragm of two neighboring heat exchange unit and the second heat exchange diaphragm is corresponding in turn to composition along air intake direction：
Fresh air channel, indirect evaporation dry passage and direct evaporation channel, changing between indirect evaporation dry passage and direct evaporation channel
Film coupling part forms static air pressure chamber.
2. diaphragm type indirect evaporation heat exchanger according to claim 1, it is characterized in that, described air exhaust passage and positioned at end
Airflow direction in the direct evaporation channel at end and the air flow direction in fresh air channel and indirect evaporation passage are perpendicular.
3. diaphragm type indirect evaporation heat exchanger according to claim 1, it is characterized in that, described air exhaust passage passes through first
Symmetrical first bending and first connecting portion are set and contact with each other compression on heat exchange diaphragm and the second heat exchange diaphragm and is achieved；
Described indirect evaporation wet channel on the first heat exchange diaphragm and the second heat exchange diaphragm by setting symmetrical described first to connect
Socket part and second connecting portion and contact with each other compression and the return air inlet between first connecting portion and second connecting portion be able to
Realize；
Described direct evaporation channel on the first heat exchange diaphragm and the second heat exchange diaphragm by setting symmetrical second connection
Portion and the second bending and contact with each other compression and the direct evaporating surface between second connecting portion and the second bending be able to
Realize；
First bending of the first heat exchange diaphragm and the second heat exchange diaphragm that described fresh air channel passes through two neighboring heat exchange unit
Realized with first connecting portion；
Described indirect evaporation dry passage exchanges heat the of diaphragm and the second heat exchange diaphragm by the first of two neighboring heat exchange unit
One connecting portion, second connecting portion and return air inlet are realized；
Described direct evaporation channel by two neighboring heat exchange unit first exchange heat diaphragm and second heat exchange diaphragm second
Connecting portion, the second bending and direct evaporating surface are realized；
Described static air pressure chamber is connected by the first heat exchange diaphragm of two neighboring heat exchange unit and the second of the second heat exchange diaphragm
Socket part is realized.
4. according to any described diaphragm type indirect evaporation heat exchanger in claims 1 to 3, it is characterized in that, composition air exhaust passage,
Indirect evaporation wet channel and direct evaporation channel and its corresponding fresh air channel, indirect evaporation dry passage and directly evaporation are logical
The heat exchange diaphragm both side surface in road is suppressed with ripple, so as to form enhancing heat exchanger chamber.
5. the diaphragm type indirect evaporation heat exchanger according to claim 1 or 3, it is characterized in that, described heat exchange diaphragm is upper
Air open-work and/or air through groove are provided with the end of indirect evaporation dry passage and indirect evaporation wet channel, for that will be cooled
Air suction wet channel.
6. the diaphragm type indirect evaporation heat exchanger according to claim 1 or 3, it is characterized in that, described heat exchange diaphragm is in place
Hydrophily flocking is provided with the surface in indirect evaporation wet channel, to strengthen the caloic of Air-Water in indirect evaporation wet channel
Exchange.
7. diaphragm type indirect evaporation heat exchanger according to claim 3, it is characterized in that, the direct steaming of described heat exchange diaphragm
Deliver face and be provided with and be used to balance the permeable hole of both sides blast and/or permeable groove.
A kind of 8. cooling tower, it is characterised in that including：It is arranged at the air draft mechanism at top and is from top to bottom set in turn in tower
Interior air draft hydrostatic portion, evaporation shower portion, heat exchange section and water circulation part, wherein：Water circulation part and evaporation
Shower portion is connected and provides spray-water, and the output end of air draft hydrostatic portion is connected with air draft mechanism, input and heat exchange
Part is connected, and the input of heat exchange section receives fresh air；
Described heat exchange section includes：Successively horizontal connected fresh air-air exhaust heat exchange device, according to any in claim 1~7
Described diaphragm type indirect evaporation heat exchanger and direct evaporating heat exchanger.
9. cooling tower according to claim 8, it is characterized in that, described evaporation shower portion includes：It is arranged at diaphragm type
Indirect evaporation shower water section at the top of indirect evaporation heat exchanger sprays with the direct evaporation being arranged at the top of direct evaporating heat exchanger
Water section.
10. cooling tower according to claim 8, it is characterized in that, described circulating part point includes：First collect cavity and with
The second collect cavity being connected, wherein：Second collect cavity is located at fresh air-air exhaust heat exchange device and indirect evaporation air draft/mouth of a river bottom
Portion, the first collect cavity is positioned at directly evaporation air draft/mouth of a river bottom, and the second cavity bottom angled gradient slope aspect first that catchments catchments
Chamber, the first collect cavity are less than the second collect cavity, and the suction inlet of cooling water pump is located at the bottom of the first collect cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045338.8U CN206638069U (en) | 2017-01-14 | 2017-01-14 | Indirect evaporation heat exchanger and its cooling tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720045338.8U CN206638069U (en) | 2017-01-14 | 2017-01-14 | Indirect evaporation heat exchanger and its cooling tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206638069U true CN206638069U (en) | 2017-11-14 |
Family
ID=60260852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720045338.8U Expired - Fee Related CN206638069U (en) | 2017-01-14 | 2017-01-14 | Indirect evaporation heat exchanger and its cooling tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206638069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767051A (en) * | 2017-01-14 | 2017-05-31 | 陈祖卫 | Indirect evaporation heat exchanger and its cooling tower |
| CN110657419A (en) * | 2019-10-08 | 2020-01-07 | 重庆大学 | Device for reducing water temperature at outlet of cooling tower |
-
2017
- 2017-01-14 CN CN201720045338.8U patent/CN206638069U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106767051A (en) * | 2017-01-14 | 2017-05-31 | 陈祖卫 | Indirect evaporation heat exchanger and its cooling tower |
| CN106767051B (en) * | 2017-01-14 | 2022-06-10 | 陈祖卫 | Indirect evaporation heat exchanger and cooling tower thereof |
| CN110657419A (en) * | 2019-10-08 | 2020-01-07 | 重庆大学 | Device for reducing water temperature at outlet of cooling tower |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171114 Termination date: 20190114 |