CN104456875A - Fresh air treatment device for indirect evaporative cooling return air total heat recovery - Google Patents

Fresh air treatment device for indirect evaporative cooling return air total heat recovery Download PDF

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Publication number
CN104456875A
CN104456875A CN201410659997.1A CN201410659997A CN104456875A CN 104456875 A CN104456875 A CN 104456875A CN 201410659997 A CN201410659997 A CN 201410659997A CN 104456875 A CN104456875 A CN 104456875A
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water
air
heat exchanger
return air
new wind
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CN201410659997.1A
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CN104456875B (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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Central Air Conditioning (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a fresh air treatment device for indirect evaporative cooling return air total heat recovery. The fresh air treatment device is composed of a sensible heat recovery device for supply air and return air, a return air total heat recovery device, an air treatment device and the like. The sensible heat recovery device is adopted for the fresh air treatment device, the supply air low in temperature is used for cooling the indoor return air, a state point of the return air is close to a saturation line before the return air enters the total heat recovery device, and therefore the total heat recovery process of fresh air and the return air is close to the saturation line, and the efficiency of the total heat recovery device is improved. Meanwhile, the supply air temperature of the fresh air is increased, and the fresh air can be fed indoors directly. Through the fresh air treatment device, recoverable energy of the return air is fully used, the input cooling capacity of a cold source is reduced, and the energy efficiency of the fresh air treatment device is improved. In addition, through working condition switching, the fresh air treatment device can have the functions of recovering heat of the return air and heating and humidifying the fresh air in winter.

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, relate to a kind of Fresh air handing device of return air total heat recovery.
Background technology
In air-conditioning system, according to the requirement of the existing sanitary standard of country, need to a certain amount of fresh outdoor air of indoor supply (new wind).The Standard General that country's HVAC is correlated with all defines the minimum fresh air requirmente (m to indoor supply 3/ h).Outdoor new wind, due to the reason such as temperature and humidity and dustiness, usually directly can not be sent into indoor, must carry out heat and wet treatment to it.During supplying cold season, outdoor air is usually hot and humid, needs outdoor air cool-down dehumidification; During supplying warm season, the usual low temperature and low humidity of outdoor air, needs outdoor air intensification humidification.Carrying out heat and wet treatment to outdoor air is one of main task of air-conditioning system, the 20%-30% of air conditioning energy consumption can be accounted for the energy consumption of Fresh air handing, if outdoor climate conditions is severe, so the energy consumption of Fresh air handing can be higher, therefore, the important step that Fresh air handing energy consumption is air conditioner system energy saving is reduced.
Current fresh air disposal adopts plate-fin heat exchanger or runner to carry out Exposure degree or total heat recovery to new wind and return air mostly, then new wind and return air mixing, and heat and wet treatment is carried out in unification, sends into indoor.Such processing mode wind pushing temperature is lower, often needs air-supply reheating or adopts secondary return air to mix with air-supply.In addition, have at present and also have some independently Fresh air handing device, such as solution dehumidification, solid dehumidifyings etc.From above background technology, not yet there is one at present in conjunction with dehumidification by condensation and transpiration-cooled Fresh air handing device.This patent is intended to the Fresh air handing device proposing a kind of return air total heat recovery, utilizes and carries out indirect evaporating-cooling to return air, uses filler and heat exchanger comprising modules, adopts the mode of Multi-stage module, fully reclaims the latent heat of return air, reduces the energy consumption of Fresh air handing.In addition, treated new air temperature and humidity suitable, directly can send into indoor.
Summary of the invention
technical problem:the invention provides a kind of recoverable energy taking full advantage of return air, decrease the cold that low-temperature receiver drops into, improve the Overall energy efficiency of Fresh air handing device, the Fresh air handing device of the indirect evaporating-cooling return air total heat recovery that heat recovery efficiency is high.
technical scheme:the Fresh air handing device of indirect evaporating-cooling return air total heat recovery of the present invention, comprise return air treatment system and fresh air treatment system, described return air treatment system comprises the return air-water-to-water heat exchanger connected successively, spraying filler module and air draft-water-to-water heat exchanger, described fresh air treatment system comprises the air-supply-water-to-water heat exchanger connected successively, surface cooler and new wind-water-to-water heat exchanger, between described return air-water-to-water heat exchanger and corresponding air-supply-water-to-water heat exchanger, water circulation connects, between described spraying filler module and corresponding new wind-water-to-water heat exchanger, water circulation connects, between described air draft-water-to-water heat exchanger and corresponding new air-water heat exchanger, water circulation connects.
In the preferred version of apparatus of the present invention, on connecting line between return air-water-to-water heat exchanger with corresponding air-supply-water-to-water heat exchanger, on connecting line between described spraying filler module with corresponding new wind-water-to-water heat exchanger, and connecting line between described air draft-water-to-water heat exchanger with corresponding new wind-water-to-water heat exchanger is provided with the water pump realizing water circulation.
In above-mentioned two schemes, when running in the winter time, summer in winter operating mode can be realized in the following ways and switch: utilize the water circulation air-air sensible heat exchanger of full heat recovery device afterbody to reclaim return air heat.
When summer condition runs, this device is provided with air-supply and the sensible heat transfer device of return air, carries out sensible heat transfer in indoor return air with between the air-supply of cool-down dehumidification.Its effect is that return air temperature is reduced, and when water capacity (kg/kg) is constant, the relative humidity (%) of return air is improved, and return air state presses close to saturated line.Meanwhile, this device improves wind pushing temperature, makes the new wind wind pushing temperature through dehumidification treatments suitable, directly can send into indoor.Sensible heat transfer device can adopt plate-fin air-air sensible heat exchanger, water circulation air-air sensible heat exchanger or heat pipe air-air sensible heat exchanger.The present invention is provided with multistage return air full heat recovery device.Form single-stage total heat recovery module by a spray module and a heat exchange module, return air full heat recovery device comprises two-stage or multistage total heat recovery module composition.Water circulation is adopted between spray module and heat exchange module.In spray module, arrange filler, water is directly contacted by filler with return air, and return air is to water for cooling.Due to before entering spray module, return air have passed through the temperature-fall period of heat recovering device, and therefore the heat and mass transfer process of return air and water is close to saturated line, and effectively can avoid the loss in heat and mass transfer process, total heat recovery efficiency is higher.Water, after return air cooling, by heat exchanger and new air heat-exchange, is lowered the temperature to new wind, and water heats up simultaneously.In full heat recovery device, new wind does not contact with return air, avoids the problem that new return air pollutes and leaks out.
In a kind of preferred version of apparatus of the present invention, described air draft-water-to-water heat exchanger is replaced with spraying filler module, also be provided with summer in winter operating mode between described return air-water-to-water heat exchanger and new wind-water-to-water heat exchanger and switch pipeline, in order to realize water circulation between the two and the switching of water circulation between return air-water-to-water heat exchanger and air-supply-water-to-water heat exchanger.
In the above-mentioned preferred version of apparatus of the present invention, described summer in winter operating mode switches pipeline and is divided into independently two-way, the water route outlet of described return air-water-to-water heat exchanger is connected by a road with the water route import of new wind-water-to-water heat exchanger, the water route import of return air-water-to-water heat exchanger is exported with the water route of new wind-water-to-water heat exchanger and is connected by another road, is provided with three-way valve in summer in winter operating mode switching pipeline.
In above-mentioned two schemes, when running in the winter time, summer in winter operating mode can be realized in the following ways and switch: the water circulation that triple valve switches sensible heat exchanger reclaims return air heat.
In the another kind of preferred version of apparatus of the present invention, air draft-water-to-water heat exchanger is replaced with spraying filler module, also be provided with plate-fin new wind-air exhaust heat exchange device simultaneously, the exhaust outlet of described spraying filler module is connected with the air draft entrance of plate-fin new wind-air exhaust heat exchange device, and the air inlet of described new wind-water-to-water heat exchanger exports with the new wind of plate-fin new wind-air exhaust heat exchange device and is connected.
In the program, when running in the winter time, summer in winter operating mode can be realized in the following ways switch: utilize the plate-fin air-air sensible heat exchanger of full heat recovery device afterbody to reclaim return air heat, new wind is after full heat recovery device, enter air processor (surface cooler), pass into chilled water to new wind cool-down dehumidification in summer, pass into hot water in the winter time and new wind is heated up, new wind, as needed humidification, can also increase humidifier after air processor again.
beneficial effect:the present invention compared with prior art, has the following advantages:
At present, the most frequently used mode of Fresh air handing is that dehumidification by condensation coordinates return air-Xin wind Exposure degree or return air-Xin wind total heat recovery, the air handling process of which be new wind and return air first by heat reclamation device, then carry out dehumidification by condensation to new wind, the new wind after processed directly sends into indoor.From the difference of said apparatus, this device is that air handling scheme is different, adopt sensible heat transfer device, the air-supply utilizing temperature lower is lowered the temperature to indoor return air, the state point of return air before entering full heat recovery device is made to be close to saturated line, therefore the total heat recovery process of new wind and return air is also close to saturated line, and the heat recycle process of current usual means is all away from saturated line.This device can adopt water to be the total heat recovery that medium carries out return air and new wind, and equipment is simple and reliable, and production cost is low, and improves the efficiency of full heat recovery device.Wind pushing temperature with stylish wind is also raised, and directly can send into indoor.This device takes full advantage of the recoverable energy of return air, decreases the cold that low-temperature receiver drops into, improves the Overall energy efficiency of Fresh air handing device.
In addition, current return air-Xin wind Exposure degree many employings plate-fin air-to-air heat exchanger, return air-Xin wind total heat recovery many employings runner total heat recovery.The recuperation of heat of this device is total heat recovery, and heat recovery efficiency is higher than plate-fin air-air Exposure degree, and heat recovery efficiency is suitable with runner total heat recovery, and cost is lower than runner total heat recovery.
Except dehumidification by condensation, current Fresh air handing device also comprises solution humidifying fresh air disposal, solid dehumidifying Fresh air handing.Compared with solution humidifying fresh air disposal, the working medium of this device is water, does not adopt dehumidification solution (as LiBr solution, LiCl solution, CaCl 2solution), therefore, avoid the etching problem of solution, band liquid of also not blowing enters indoor problem.Owing to not having etching problem, the heat exchanger of this device all can adopt common fin-tube type heat exchanger and plate type heat exchanger, and without the need to adopting special corrosion-proof heat exchanger, can significantly reduce costs.Compared with solid dehumidifying mode, the air handling scheme of this device is different.The air dewetting process of solid dehumidifying flow process is constant-enthalpy process, and the dehumidification process of this device is the process of pressing close to saturated line, and by dehumidification by condensation mode, chilled water directly can dehumidify to air.Therefore, this device does not need to adopt hygroscopic agent, and also do not relate to the regeneration issues of hygroscopic agent, therefore produce, make simply, cost can decline to a great extent.
Apparatus of the present invention can realize the conversion of winter and summer operating mode.When running in the winter time, according to the difference of scenario-frame form, following several mode can be adopted respectively to realize summer in winter operating mode and to switch: (1) utilizes the water circulation air-air sensible heat exchanger of full heat recovery device afterbody to reclaim return air heat; (2) triple valve switches the water circulation recovery return air heat of sensible heat exchanger; (3) the plate-fin air-air sensible heat exchanger of full heat recovery device afterbody is utilized to reclaim return air heat.
Accompanying drawing explanation
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, new wind-water-to-water heat exchanger 5, air draft-water-to-water heat exchanger 6, plate-fin new wind-air exhaust heat exchange device 7, water pump 8, three-way valve 9.
Detailed description of the invention
Below in conjunction with 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, this device comprises return air treatment system and fresh air treatment system, described return air treatment system comprises the return air-water-to-water heat exchanger 1 connected successively, spraying filler module 2 and air draft-water-to-water heat exchanger 6, described fresh air treatment system comprises the air-supply-water-to-water heat exchanger 3 connected successively, surface cooler 4 and new wind-water-to-water heat exchanger 5, described return air-water-to-water heat exchanger 1 supplies gas with corresponding-water-to-water heat exchanger 3 between water circulation connect, between described spraying filler module 2 and corresponding new wind-water-to-water heat exchanger 5, water circulation connects, between described air draft-water-to-water heat exchanger 6 and corresponding new wind-water-to-water heat exchanger 5, water circulation connects.During summer operation, new wind passes through heat exchanger successively, multistage total heat recovery heat exchanger, surface cooler and Exposure degree heat exchanger, and return air passes through Exposure degree heat exchanger successively, multistage filler and Exposure degree heat exchanger; During winter operation, close total heat recovery heat exchanger and air-supply side Exposure degree heat exchanger.Described return air-water-to-water heat exchanger 1 blows with corresponding-water-to-water heat exchanger 3 between connecting line on be provided with to realize the water pump of water circulation, connecting line between described spraying filler module 2 with corresponding new wind-water-to-water heat exchanger 5 is provided with the water pump 8 realizing water circulation, the connecting line between described air draft-water-to-water heat exchanger 6 with corresponding new wind-water-to-water heat exchanger 5 is provided with the water pump 8 realizing water circulation.
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, and surface cooler, spraying filler and water pump form.Described in Fig. 1, air draft-water-to-water heat exchanger 6 replaces with spraying filler module 2, also be provided with summer in winter operating mode between described return air-water-to-water heat exchanger 1 and new wind-water-to-water heat exchanger 5 and switch pipeline, in order to realize water circulation between the two 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 switches pipeline and is divided into independently two-way, the water route outlet of described return air-water-to-water heat exchanger 1 is connected by a road with the water route import of new wind-water-to-water heat exchanger 5, the water route import of return air-water-to-water heat exchanger 1 is exported with the water route of new wind-water-to-water heat exchanger 5 and is connected by another road, is provided with three-way valve 9 in summer in winter operating mode switching pipeline.During summer operation, new wind passes through multistage total heat recovery heat exchanger successively, surface cooler and Exposure degree heat exchanger, and return air passes through Exposure degree heat exchanger successively, multistage filler; During winter operation, switched by threeway, after Exposure degree is carried out to new wind and return air, send into indoor to new wind heating again, air temperature as new in outdoor is lower, can to its preheating before new wind enters heat exchanger, as new wind needs humidification, between feeding indoor, humidifier can be increased.
Fig. 3 shows the Fresh air handing schematic diagram of device (plate-fin recuperation of heat) of return air total heat recovery, Fig. 2 air draft-water-to-water heat exchanger 6 replaces with spraying filler module 2, also be provided with plate-fin new wind-air exhaust heat exchange device 7 simultaneously, the exhaust outlet of described spraying filler module 2 is connected with the air draft entrance of plate-fin new wind-air exhaust heat exchange device 7, and the air inlet of described new wind-water-to-water heat exchanger 5 exports with the new wind of plate-fin new wind-air exhaust heat exchange device 7 and is connected.System operation mode and Fig. 1 system class are seemingly.
Above-described embodiment is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention; some improvement and equivalent replacement can also be made; these improve the claims in the present invention and are equal to the technical scheme after replacing, and all fall into protection scope of the present invention.

Claims (5)

1. the Fresh air handing device of an indirect evaporating-cooling return air total heat recovery, it is characterized in that, this device comprises return air treatment system and fresh air treatment system, described return air treatment system comprises the return air-water-to-water heat exchanger (1) connected successively, spraying filler module (2) and air draft-water-to-water heat exchanger (6), described fresh air treatment system comprises the air-supply-water-to-water heat exchanger (3) connected successively, surface cooler (4) and new wind-water-to-water heat exchanger (5), described return air-water-to-water heat exchanger (1) connects with corresponding water circulation between-water-to-water heat exchanger (3) of supplying gas, between described spraying filler module (2) and corresponding new wind-water-to-water heat exchanger (5), water circulation connects, between described air draft-water-to-water heat exchanger (6) and corresponding new wind-water-to-water heat exchanger (5), water circulation connects.
2. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1, it is characterized in that, described return air-water-to-water heat exchanger (1) is with on corresponding connecting line of blowing between-water-to-water heat exchanger (3), on connecting line between described spraying filler module (2) with corresponding new wind-water-to-water heat exchanger (5), and connecting line between described air draft-water-to-water heat exchanger (6) with corresponding new wind-water-to-water heat exchanger (5) is provided with the water pump (8) realizing water circulation.
3. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1 and 2, it is characterized in that, described air draft-water-to-water heat exchanger (6) replaces with spraying filler module (2), also be provided with summer in winter operating mode between described return air-water-to-water heat exchanger (1) and new wind-water-to-water heat exchanger (5) and switch pipeline, in order to realize water circulation between the two and the switching of water circulation between return air-water-to-water heat exchanger (1) and air-supply-water-to-water heat exchanger (3).
4. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 3, it is characterized in that, described summer in winter operating mode switches pipeline and is divided into independently two-way, the water route outlet of described return air-water-to-water heat exchanger (1) is connected by a road with the water route import of new wind-water-to-water heat exchanger (5), the water route import of return air-water-to-water heat exchanger (1) is exported with the water route of new wind-water-to-water heat exchanger (5) and is connected by another road, is provided with three-way valve (9) in summer in winter operating mode switching pipeline.
5. the Fresh air handing device of indirect evaporating-cooling return air total heat recovery according to claim 1 and 2, it is characterized in that, described air draft-water-to-water heat exchanger (6) replaces with spraying filler module (2), also be provided with the new wind of plate-fin-air exhaust heat exchange device (7) simultaneously, the exhaust outlet of described spraying filler module (2) is connected with the air draft entrance of the new wind of plate-fin-air exhaust heat exchange device (7), and the air inlet of described new wind-water-to-water heat exchanger (5) exports be connected with the new wind of the plate-fin-new wind of air exhaust heat exchange device (7).
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CN108006855A (en) * 2017-12-11 2018-05-08 广东申菱环境系统股份有限公司 Data center module recovery efficient Cooling Air-conditioning System
CN108917002A (en) * 2018-08-17 2018-11-30 盐城市力马空调工程有限公司 A kind of novel combined air conditioning group
CN108917002B (en) * 2018-08-17 2023-12-26 盐城市力马空调工程有限公司 Combined air conditioning unit
CN109945333A (en) * 2019-02-19 2019-06-28 东南大学 A kind of residential architecture air-conditioning system that the dispersion of central fresh air handling end is adjusted

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