CN104456875B - A kind of Fresh air handing device of indirect evaporating-cooling return air total heat recovery - Google Patents

A kind of Fresh air handing device of indirect evaporating-cooling return air total heat recovery Download PDF

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Publication number
CN104456875B
CN104456875B CN201410659997.1A CN201410659997A CN104456875B CN 104456875 B CN104456875 B CN 104456875B CN 201410659997 A CN201410659997 A CN 201410659997A CN 104456875 B CN104456875 B CN 104456875B
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water
air
heat exchanger
fresh air
return air
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CN104456875A (en
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张伦
张小松
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Southeast University
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Southeast University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/147Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56Heat recovery units

Abstract

The invention discloses a kind of Fresh air handing device of indirect evaporating-cooling return air total heat recovery, it is made up of air-supply and heat recovering device, return air full heat recovery device, air processor of return air etc..The device uses sensible heat transfer device, indoor return air is lowered the temperature using temperature relatively low air-supply, so that state point of the return air before full heat recovery device is entered is close to saturated line, therefore fresh air is also close to saturated line with the total heat recovery process of return air, improves the efficiency of full heat recovery device.The wind pushing temperature of fresh air is also raised simultaneously, can be sent directly into interior.The device takes full advantage of the recoverable energy of return air, reduces the cold of low-temperature receiver input, improves the efficiency of Fresh air handing device.Additionally, the present invention is switched by operating mode, it is possible to achieve recuperation of heat of the winter to return air and the function to fresh air warming and humidifying.

Description

A kind of Fresh air handing device of indirect evaporating-cooling return air total heat recovery
Technical field
The invention belongs to heating ventilation air-conditioning system field, it is related to a kind of Fresh air handing device of return air total heat recovery.
Background technology
In air-conditioning system, the requirement according to national existing sanitary standard is, it is necessary to a certain amount of fresh outdoor of indoor supply Air (fresh air).The related Standard General of national HVAC all defines the minimum fresh air requirmente (m to indoor supply3/h).Room Outer fresh air generally can not be sent directly into interior due to reasons such as temperature and humidity and dustiness, it is necessary to hot wet place is carried out to it Reason.During cooling season, outdoor air is generally hot and humid, it is necessary to outdoor air cool-down dehumidification;It is outdoor during warm season The usual low temperature and low humidity of air is humidified, it is necessary to be heated up to outdoor air.The master that heat and wet treatment is air-conditioning system is carried out to outdoor air One of task is wanted, the energy consumption to Fresh air handing can account for the 20%-30% of air conditioning energy consumption, if outdoor climate conditions are disliked It is bad, then the energy consumption of Fresh air handing can be higher, therefore, reduce the important step that Fresh air handing energy consumption is air conditioner system energy saving.
Current fresh air disposal carries out Exposure degree using plate-fin heat exchanger or runner to fresh air and return air mostly Or total heat recovery, then fresh air and return air mixing, unified to carry out heat and wet treatment, and feeding is indoor.Such processing mode air-supply temperature Degree is relatively low, generally requires to mix with air-supply to air-supply reheating or using secondary return air.In addition, there are also some independences at present Fresh air handing device, such as solution dehumidification, solid dehumidifying etc..From the point of view of background above technology, not yet there is a kind of combination at present Dehumidification by condensation and transpiration-cooled Fresh air handing device.This patent is directed to a kind of Fresh air handing of return air total heat recovery Device, indirect evaporating-cooling is carried out using to return air, using filler and heat exchanger comprising modules, by the way of Multi-stage module, The latent heat of return air is fully reclaimed, the energy consumption of Fresh air handing is reduced.Additionally, treated fresh air temperature and humidity is suitable, can be with It is sent directly into interior.
The content of the invention
Technical problem:The invention provides a kind of recoverable energy for taking full advantage of return air, low-temperature receiver input is reduced Cold, improves the Overall energy efficiency of Fresh air handing device, heat recovery efficiency indirect evaporating-cooling return air total heat recovery high it is new Wind processing unit.
Technical scheme:The Fresh air handing device of indirect evaporating-cooling return air total heat recovery of the invention, including return air treatment System and fresh air treatment system, the return air processing system include be sequentially connected return air-water- to-water heat exchanger, spraying filler module and Air draft-water- to-water heat exchanger, the fresh air treatment system includes the air-supply-water- to-water heat exchanger, surface cooler and the fresh air-water heat exchange that are sequentially connected Device, between the return air-water- to-water heat exchanger and corresponding air-supply-water- to-water heat exchanger water circulation connection, the spraying filler module with it is right Water circulation connection, water between the air draft-water- to-water heat exchanger and corresponding new air-water heat exchanger between the fresh air-water- to-water heat exchanger answered Circulation connection.
In the preferred scheme of apparatus of the present invention, the connecting line between return air-water- to-water heat exchanger and corresponding air-supply-water- to-water heat exchanger On, on the connecting line between the spraying filler module and corresponding fresh air-water- to-water heat exchanger, and the air draft-water- to-water heat exchanger Be provided with to realize the water pump of water circulation on the connecting line between corresponding fresh air-water- to-water heat exchanger.
In above two scheme, when running in the winter time, can in the following ways realize that summer in winter operating mode switches:Returned using full heat The water circulation air-air sensible heat exchanger of receiving apparatus afterbody reclaims return air heat.
When summer condition runs, the device is provided with the sensible heat transfer device of air-supply and return air, indoors return air and warp Crossing between the air-supply of cool-down dehumidification carries out sensible heat transfer.Its effect is to reduce return air temperature, constant in water capacity (kg/kg) In the case of, the relative humidity (%) of return air is improved, return air state presses close to saturated line.Meanwhile, the device improves wind pushing temperature, makes Must be suitable by the fresh air wind pushing temperature of dehumidification treatments, interior can be sent directly into.Sensible heat transfer device can be empty using plate-fin Gas-air sensible heat exchanger, water circulation air-air sensible heat exchanger or heat pipe air-air sensible heat exchanger.The present invention sets Multistage return air full heat recovery device is put.Single-stage total heat recovery module is constituted by a spray module and a heat exchange module, is returned Wind full heat recovery device includes two-stage or multistage total heat recovery module.Water circulation is used between spray module and heat exchange module. Filler is set in module is sprayed, and water with return air by filler directly contact, to water lower the temperature by return air.Due to entering spray module Before, return air have passed through the temperature-fall period of heat recovering device, therefore return air is close to saturated line with the heat and mass transfer process of water, It is possible to prevente effectively from the loss in heat and mass transfer process, total heat recovery efficiency is higher.After water is lowered the temperature by return air, by heat exchange Device and new air heat-exchange, to fresh air cooling, while water heats up.In full heat recovery device, fresh air and return air are not contacted, it is to avoid new The problem that return air pollutes and leaks out.
In a kind of preferred scheme of apparatus of the present invention, the air draft-water- to-water heat exchanger is replaced with into spraying filler module, it is described Summer in winter operating mode switching pipeline is additionally provided between return air-water- to-water heat exchanger and fresh air-water- to-water heat exchanger, is used to realize that water is followed between the two The switching of water circulation between ring and return air-water- to-water heat exchanger and air-supply-water- to-water heat exchanger.
In the above-mentioned preferred scheme of apparatus of the present invention, summer in the winter operating mode switching pipeline is divided into independent two-way, described time The water route outlet of wind-water- to-water heat exchanger passes through to be connected all the way with the water route import of fresh air-water- to-water heat exchanger, the water of return air-water- to-water heat exchanger Road import is connected with the water route outlet of fresh air-water- to-water heat exchanger by another road, and triple valve is provided with summer in winter operating mode switching pipeline Door.
In above two scheme, when running in the winter time, can in the following ways realize that summer in winter operating mode switches:Threeway Vavle switching The water circulation of sensible heat exchanger reclaims return air heat.
In another preferred scheme of apparatus of the present invention, air draft-water- to-water heat exchanger is replaced with into spraying filler module, while also It is provided with plate-fin fresh air-air exhaust heat exchange device, exhaust outlet and the plate-fin fresh air-air exhaust heat exchange device of the spraying filler module Air draft entrance is connected, and the air inlet of the fresh air-water- to-water heat exchanger is connected with the fresh air outlet of plate-fin fresh air-air exhaust heat exchange device.
In the program, when running in the winter time, can in the following ways realize that summer in winter operating mode switches:Using full heat recovery device The plate-fin air-air sensible heat exchanger of afterbody reclaims return air heat, and fresh air enters after full heat recovery device Air processor (surface cooler), is passed through chilled water and fresh air cooling is dehumidified in summer, hot water is passed through in the winter time fresh air is heated up, Fresh air such as needs humidification, can also increase humidifier after air processor again.
Beneficial effect:The present invention compared with prior art, with advantages below:
At present, the most frequently used mode of Fresh air handing is that dehumidification by condensation coordinates return air-fresh air Exposure degree or return air-fresh air complete Recuperation of heat, the air handling process of which is that fresh air first passes through heat reclamation device with return air, and then carrying out condensation to fresh air removes Wet, the fresh air after being processed is sent directly into interior.The present apparatus is different air handling scheme from the difference of said apparatus, is adopted Sensible heat transfer device is used, indoor return air is lowered the temperature using temperature relatively low air-supply so that return air is entering total heat recovery dress State point before putting is close to saturated line, therefore fresh air is also close to saturated line with the total heat recovery process of return air, and current The heat recycle process of usual means is all away from saturated line.The present apparatus can adopt water as medium and carry out the full heat time of return air and fresh air Receive, equipment is simple and reliable, low production cost, and improves the efficiency of full heat recovery device.The wind pushing temperature of fresh air is also obtained simultaneously To rising, interior can be sent directly into.The device takes full advantage of the recoverable energy of return air, reduces the cold of low-temperature receiver input Amount, improves the Overall energy efficiency of Fresh air handing device.
Additionally, using plate-fin air-to-air heat exchanger current return air-fresh air Exposure degree, return air-fresh air is entirely hot more Reclaim many using runner total heat recovery.The recuperation of heat of the present apparatus is total heat recovery, and heat recovery efficiency is higher than plate-fin air-air Exposure degree, heat recovery efficiency is suitable with runner total heat recovery, and cost is less than runner total heat recovery.
In addition to dehumidification by condensation, current Fresh air handing device also includes solution humidifying fresh air disposal, solid dehumidifying Fresh air handing.Compared with solution humidifying fresh air disposal, the working medium of the present apparatus is water, and dehumidification solution is not used, and (such as LiBr is molten Liquid, LiCl solution, CaCl2Solution), therefore, it is to avoid the etching problem of solution, do not blow with asking that liquid gets in yet Topic.Due to no etching problem, the heat exchanger of the present apparatus can use common fin-tube type heat exchanger and plate type heat exchanger, and nothing Special corrosion-proof heat exchanger need to be used, cost can be greatly reduced.Compared with solid dehumidifying mode, the air handling scheme of the present apparatus It is different.The air dewetting process of solid dehumidifying flow is constant-enthalpy process, and the dehumidification process of the present apparatus is to press close to saturated line Process, by dehumidification by condensation mode, chilled water can be to the direct dehumidifying of air.Therefore, the present apparatus need not use hygroscopic agent, It is not related to the regeneration issues of hygroscopic agent yet, therefore production, making are simply, cost can decline to a great extent.
Apparatus of the present invention can realize the conversion of winter and summer condition.When running in the winter time, according to scenario-frame form Difference, can be respectively adopted following several ways and realize that summer in winter operating mode switches:(1) followed using the water of full heat recovery device afterbody Annular space gas-air sensible heat exchanger reclaims return air heat;(2) water circulation of threeway Vavle switching sensible heat exchanger reclaims return air heat Amount;(3) return air heat is reclaimed using the plate-fin air-air sensible heat exchanger of full heat recovery device afterbody.
Brief description of the drawings
Fig. 1 is the Fresh air handing schematic diagram of device (water circulation recuperation of heat) of return air total heat recovery.
Fig. 2 is the Fresh air handing schematic diagram of device (three-way switching) of return air total heat recovery.
Fig. 3 is the Fresh air handing schematic diagram of device (plate-fin recuperation of heat) of return air total heat recovery.
Have in figure:Return air-water- to-water heat exchanger 1, spraying filler module 2, air-supply-water- to-water heat exchanger 3, surface cooler 4, fresh air-water are changed Hot device 5, air draft-water- to-water heat exchanger 6, plate-fin fresh air-air exhaust heat exchange device 7, water pump 8, three-way valve 9.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is further illustrated.
Fig. 1 shows the Fresh air handing schematic diagram of device (water circulation recuperation of heat) of return air total heat recovery, and the device includes back Wind processing system and fresh air treatment system, the return air processing system include that the return air-water- to-water heat exchanger 1 being sequentially connected, spray are filled out Material module 2 and air draft-water- to-water heat exchanger 6, the fresh air treatment system include the air-supply-water- to-water heat exchanger 3, the surface cooler 4 that are sequentially connected With fresh air-water- to-water heat exchanger 5, water circulation connection, described between the return air-water- to-water heat exchanger 1 and corresponding air-supply-water- to-water heat exchanger 3 Between spraying filler module 2 and corresponding fresh air-water- to-water heat exchanger 5 water circulation connection, the air draft-water- to-water heat exchanger 6 with it is corresponding Water circulation connection between fresh air-water- to-water heat exchanger 5.During summer operation, fresh air passes sequentially through heat exchanger, multistage total heat recovery heat exchange Device, surface cooler and Exposure degree heat exchanger, return air pass sequentially through Exposure degree heat exchanger, and multistage filler and Exposure degree exchange heat Device;During winter operation, total heat recovery heat exchanger and air-supply side Exposure degree heat exchanger are closed.Return air-the water- to-water heat exchanger 1 with it is right Should blow-water- to-water heat exchanger 3 between connecting line on be provided with to realize the water pump of water circulation, the spraying filler module 2 Be provided with to realize the water pump 8 of water circulation on the connecting line between corresponding fresh air-water- to-water heat exchanger 5, the air draft-water is changed It is provided with to realize the water pump 8 of water circulation on connecting line between hot device 6 and corresponding fresh air-water- to-water heat exchanger 5.
Fig. 2 shows the Fresh air handing schematic diagram of device (three-way switching) of return air total heat recovery, and system is by heat exchanger, table Cooler, spraying filler and water pump are constituted.Air draft-water- to-water heat exchanger 6 described in Fig. 1 replaces with spraying filler module 2, the return air-water Be additionally provided between heat exchanger 1 and fresh air-water- to-water heat exchanger 5 summer in winter operating mode switching pipeline, be used to realize between the two water circulation and The switching of water circulation between return air-water- to-water heat exchanger 1 and air-supply-water- to-water heat exchanger 3.Summer in winter operating mode switching pipeline is divided into independent two Road, the water route outlet of the return air-water- to-water heat exchanger 1 passes through to be connected all the way with the water route import of fresh air-water- to-water heat exchanger 5, return air-water The water route import of heat exchanger 1 is connected with the water route outlet of fresh air-water- to-water heat exchanger 5 by another road, in summer in winter operating mode switching pipeline It is provided with three-way valve 9.During summer operation, fresh air passes sequentially through multistage total heat recovery heat exchanger, and surface cooler and Exposure degree are changed Hot device, return air passes sequentially through Exposure degree heat exchanger, multistage filler;During winter operation, switched by threeway, to fresh air and return air After carrying out Exposure degree then indoor to fresh air heating feeding, such as outdoor fresh air temperature is relatively low, can be before fresh air enters heat exchanger It is preheated, such as fresh air needs humidification, humidifier can be increased between interior is sent into.
Fig. 3 shows the Fresh air handing schematic diagram of device (plate-fin recuperation of heat) of return air total heat recovery, and Fig. 2 air drafts-water is changed Hot device 6 replaces with spraying filler module 2, while plate-fin fresh air-air exhaust heat exchange device 7 is additionally provided with, the spraying filler module 2 Exhaust outlet be connected with the air draft entrance of plate-fin fresh air-air exhaust heat exchange device 7, the air inlet and plate of the fresh air-water- to-water heat exchanger 5 The fresh air outlet connection of wing formula fresh air-air exhaust heat exchange device 7.System operation mode is similar with Fig. 1 systems.
Above-described embodiment is only the preferred embodiment of the present invention, it should be pointed out that:For the ordinary skill of the art For personnel, under the premise without departing from the principles of the invention, some improvement and equivalent can also be made, these are to the present invention Claim be improved with the technical scheme after equivalent, each fall within protection scope of the present invention.

Claims (5)

1. a kind of Fresh air handing device of indirect evaporating-cooling return air total heat recovery, it is characterised in that the device is included at return air Reason system and fresh air treatment system, the return air processing system include the return air-water- to-water heat exchanger being sequentially connected(1), spraying filler Module(2)With air draft-water- to-water heat exchanger(6), the fresh air treatment system includes air-supply-water- to-water heat exchanger for being sequentially connected(3), table it is cold Device(4)With fresh air-water- to-water heat exchanger(5), the return air-water- to-water heat exchanger(1)With corresponding air-supply-water- to-water heat exchanger(3)Between water follow Ring is connected, the spraying filler module(2)With corresponding fresh air-water- to-water heat exchanger(5)Between water circulation connection, the air draft-water Heat exchanger(6)With corresponding fresh air-water- to-water heat exchanger(5)Between water circulation connection, the spraying filler module(2)It is multiple, institute State fresh air-water- to-water heat exchanger(5)It is multiple.
2. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1, it is characterised in that institute State return air-water- to-water heat exchanger(1)With corresponding air-supply-water- to-water heat exchanger(3)Between connecting line on, the spraying filler module(2) With corresponding fresh air-water- to-water heat exchanger(5)Between connecting line on, and the air draft-water- to-water heat exchanger(6)With corresponding fresh air-water Heat exchanger(5)Between connecting line on be provided with to realize the water pump of water circulation(8).
3. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1 and 2, its feature exists In the air draft-water- to-water heat exchanger(6)Replace with spraying filler module(2), the return air-water- to-water heat exchanger(1)Changed with fresh air-water Hot device(5)Between be additionally provided with summer in winter operating mode switching pipeline, be used to realize water circulation between the two and return air-water- to-water heat exchanger(1) With air-supply-water- to-water heat exchanger(3)Between water circulation switching.
4. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 3, it is characterised in that institute State summer in winter operating mode switching pipeline and be divided into independent two-way, the return air-water- to-water heat exchanger(1)Water route outlet and the heat exchange of fresh air-water Device(5)Water route import by connecting all the way, return air-water- to-water heat exchanger(1)Water route import and fresh air-water- to-water heat exchanger(5)Water Way outlet is connected by another road, and three-way valve is provided with summer in winter operating mode switching pipeline(9).
5. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1 and 2, its feature exists In the air draft-water- to-water heat exchanger(6)Replace with spraying filler module(2), while being additionally provided with plate-fin fresh air-air exhaust heat exchange Device(7), the spraying filler module(2)Exhaust outlet and plate-fin fresh air-air exhaust heat exchange device(7)Air draft entrance connection, institute State fresh air-water- to-water heat exchanger(5)Air inlet and plate-fin fresh air-air exhaust heat exchange device(7)Fresh air outlet connection.
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CN105371397A (en) * 2015-11-25 2016-03-02 北京格瑞力德空调科技有限公司 Evaporative cooling total heat recovery independent integrated dehumidification fresh air handling unit with embedded cold source
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