CN107763762B - compound fresh air handling unit with solution assistance - Google Patents
compound fresh air handling unit with solution assistance Download PDFInfo
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- CN107763762B CN107763762B CN201711101391.6A CN201711101391A CN107763762B CN 107763762 B CN107763762 B CN 107763762B CN 201711101391 A CN201711101391 A CN 201711101391A CN 107763762 B CN107763762 B CN 107763762B
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- 150000001875 compounds Chemical class 0.000 title description 2
- 238000007791 dehumidification Methods 0.000 claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 12
- 230000001172 regenerating effect Effects 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims description 28
- 230000008929 regeneration Effects 0.000 claims description 20
- 238000011069 regeneration method Methods 0.000 claims description 20
- 238000009833 condensation Methods 0.000 claims description 19
- 230000005494 condensation Effects 0.000 claims description 19
- 238000005507 spraying Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 description 150
- 238000004378 air conditioning Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 238000001816 cooling Methods 0.000 description 10
- 238000005265 energy consumption Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 6
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003303 reheating Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-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
- F24F3/12—Air-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
- F24F3/14—Air-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
- F24F3/147—Air-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
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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)
- Drying Of Gases (AREA)
Abstract
The invention discloses a solution-assisted composite fresh air processing unit which comprises a first air duct and a second air duct which are arranged in parallel, a surface cooler, an evaporator, a solution dehumidifier, a second condenser, a solution regenerator, a high-temperature cold water supply pipeline connected with an inlet of a cooling water coil of the surface cooler, a high-temperature cold water return pipeline connected with an outlet of the cooling water coil of the surface cooler, a first condenser connected with the evaporator through a compressor and an expansion valve, a dehumidifying solution pump connected with the solution dehumidifier and a regenerating solution pump connected with the solution regenerator. The heat of the steam compression type refrigeration cycle and the solution dehumidification cycle in the whole unit is transferred through air, so that the direct contact of corrosive solution with an evaporator and a condenser is avoided; the unit has the characteristics of low cost, stable operation and outstanding energy-saving performance, and has great engineering practical value.
Description
Technical Field
The invention relates to an energy-saving fresh air handling unit capable of realizing accurate control of air temperature and humidity, and belongs to the technical field of design and manufacture of air conditioning systems.
Background
In various buildings, the energy consumption of an air conditioning system for meeting the indoor thermal comfortable environment accounts for about 50 percent of the total energy consumption of the building, and the energy consumption level of the air conditioning system is an important index for judging whether a certain building reaches the energy-saving standard or not. However, the currently commonly used air conditioning system consumes a large amount of electric energy and causes serious environmental pollution problems due to its own structure and defects in air treatment modes, so that the development of an energy-saving and environment-friendly air conditioning system is more urgent and has practical significance.
at present, a fresh air unit used in a building air conditioning system carries out cooling, condensation and dehumidification through a surface air cooler and then sends cooled and dried fresh air into a room to process fresh air sensible heat load and latent heat load. In order to achieve the purpose, the temperature of a cold source in the surface air cooler must meet the requirements of fresh air sensible heat and latent heat load treatment at the same time, but the temperature of the cold source meeting the requirements of sensible heat load treatment is far higher than that of the cold source meeting the requirements of latent heat load treatment. Under typical working conditions in summer, the fresh air sensible heat load accounts for 60-80%, the sensible heat load which accounts for more than half of the total load can be treated by using a high-temperature cold source, and the fresh air sensible heat load and the latent heat load share a low-temperature cold source under the existing air treatment mode, so that great waste on energy utilization grade is caused; the problem that the air temperature after dehumidification is too low due to too low cold source temperature cannot meet the requirement of air supply of a room, and at the moment, the air needs to be reheated, so that the energy consumption of an air conditioning system is further increased.
To the above problems, in recent years, some independent temperature and humidity control air conditioning systems based on a solution dehumidification technology have been widely studied, and one of the most common fresh air processing devices in the technology is a heat pump-driven solution dehumidification fresh air handling unit. In the solution dehumidification fresh air unit driven by the heat pump, the latent heat and the sensible heat load of fresh air are simultaneously processed by the dehumidification solution, the cold energy of the heat pump system is used for cooling the dehumidification solution, and the heat is used for regenerating the dehumidification solution. However, in the heat pump driven solution dehumidification fresh air handling unit which is used in practical engineering at present, some devices need to exchange heat between solution and refrigerant, such as an evaporator and a condenser. However, since the commonly used dehumidifying solutions (such as lithium bromide and lithium chloride solutions) are very corrosive to conventional metals, the heat exchange pipes in the equipment cannot be made of copper or stainless steel materials, and the corrosion-resistant titanium materials are often used in the heat exchange parts of the solution of the evaporator and the condenser and the refrigerant in the existing heat pump driven solution dehumidifying fresh air handling unit. However, titanium materials are expensive relative to conventional metal materials, which greatly increases the manufacturing cost of the fresh air handling unit. On the other hand, the working pressure in the evaporator and the condenser which directly exchange heat between the solution and the refrigerant is often higher, so that the refrigerant is easy to leak, and the working performance of the unit is unstable.
In conclusion, the improvement and performance optimization of the traditional fresh air handling unit and the heat pump driven solution dehumidifier unit are of great significance for reducing the energy consumption and equipment cost of the building air conditioning system.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides a solution-assisted composite fresh air processing unit, wherein the fresh air processing flow of the unit adopts three-stage modes of pre-cooling pre-dehumidification, condensation dehumidification and dehumidification reheating, and the heat transfer between a steam compression refrigeration cycle and a solution dehumidification cycle is realized through air flow, so that the problems of high energy consumption, high cost and unstable operation of a solution dehumidification unit driven by a heat pump of the traditional fresh air processing unit are solved.
The technical scheme is as follows: the invention relates to a solution-assisted composite fresh air processing unit which comprises a first air duct and a second air duct which are arranged in parallel, a surface cooler, an evaporator, a solution dehumidifier, a second condenser, a solution regenerator, a high-temperature cold water supply pipeline, a high-temperature cold water return pipeline, a first condenser, a dehumidifying solution pump and a regenerating solution pump, wherein the surface cooler, the evaporator and the solution dehumidifier are sequentially arranged in the first air duct, the high-temperature cold water supply pipeline is connected with an inlet of a cooling water coil of the surface cooler, the high-temperature cold water return pipeline is connected with an outlet of the cooling water coil of the surface cooler, the first condenser is connected with the evaporator through a compressor and an expansion valve, the dehumidifying solution pump is connected with. The surface cooler is arranged at the inlet of the first air channel, the outlet of a refrigerant coil of the evaporator is connected with the inlet of the compressor, and the inlet of the refrigerant coil of the evaporator is connected with the outlet of the expansion valve; a refrigerant pipeline connected with the outlet of the compressor is divided into two paths which are connected in parallel, wherein one path is connected to a refrigerant inlet of the first condenser, and the other path is connected to a refrigerant inlet of the second condenser; the inlet of a cooling water coil of the first condenser is connected with a high-temperature cold water supply pipeline, the outlet of the cooling water coil of the first condenser is connected with a high-temperature cold water return pipeline, and the outlet of a refrigerant pipeline of the first condenser is connected to the inlet of an expansion valve; the second condenser is arranged at the inlet of the second air duct, and the outlet of the refrigerant pipeline of the second condenser is also connected to the inlet of the expansion valve. The bottom of the solution dehumidifier is provided with two solution outlets, wherein a first outlet is connected to an inlet of a dehumidifying solution pump, an outlet of the dehumidifying solution pump is connected with a solution spraying device at the top of the solution dehumidifier, and a second outlet is connected to an inlet of a regenerating solution pump; the solution regenerator is arranged right behind the second condenser, two solution outlets are arranged at the bottom of the solution regenerator, a first outlet of the solution regenerator is connected to an inlet of a regeneration solution pump, an outlet of the regeneration solution pump is connected to a solution spraying device at the top of the solution regenerator, and a second outlet of the solution regenerator is also connected to an inlet of a dehumidification solution pump.
Furthermore, in the device, a first fan is arranged at the air supply end of the first air duct, and a second fan is arranged at the air exhaust end of the second air duct.
furthermore, in the device, a high-temperature cold water supply pipeline takes high-temperature cold water with the temperature of 16-18 ℃ as a cold source and supplies the cold water to the surface air cooler and the first condenser at the same time.
Furthermore, in the device, the first condenser and the second condenser are connected in parallel to process the condensation heat of the vapor compression refrigeration cycle, wherein the condensation heat in the second condenser is brought into the solution regenerator by air and is used as a heat source for solution regeneration.
In the invention, the solution-assisted composite fresh air processing unit completes fresh air temperature and humidity processing in a first air channel; the fresh air inlet end of the first air duct is firstly provided with a surface air cooler for precooling and pre-dehumidifying fresh air, a cold source used in the surface air cooler is high-temperature cold water at the temperature of 16-18 ℃, the high-temperature cold water is provided by an additional water chilling unit used on site, and high-temperature and high-humidity air can be primarily cooled and dehumidified in the surface air cooler; the evaporator of the vapor compression refrigeration cycle is arranged behind the surface cooler, the fresh air after primary cooling and dehumidification is further cooled and dehumidified after passing through the evaporator, the temperature of the fresh air is reduced to a lower level by the evaporator at the moment, the humidity is also greatly reduced, and the air dehumidification mode passing through the evaporator is a mechanical dew point dehumidification method; the new trend temperature after the evaporimeter is handled should be less than the air supply temperature requirement to need continue to handle its humidity, consequently set up the solution dehumidifier behind the evaporimeter, solution dehumidification process is the process that the temperature rose humidity reduces to the air, and the new trend is reheated when the solution dehumidifier, humidity also is further handled and is satisfied the air supply requirement, and solution in the solution dehumidifier concentration after having absorbed the moisture in the new trend descends.
in the solution-assisted composite fresh air processing unit, a vapor compression refrigeration cycle mainly comprises an evaporator, a compressor, two condensers and an expansion valve; the two condensers are connected in parallel, the condensation heat of the first condenser is treated by 16-18 ℃ high-temperature cold water, and a cold water pipeline of the first condenser is connected in parallel with a cold water pipeline of the surface air cooler.
In the invention, the solution-assisted composite fresh air processing unit completes the processing of redundant condensation heat and the regeneration of a dehumidification solution in a second air channel; the second condenser of the vapor compression refrigeration cycle is arranged at the inlet end of the second air duct, and the condensation heat of the second condenser is treated by the mixed air of return air of an air-conditioning room and outdoor fresh air; the temperature of the mixed air is greatly increased after the mixed air is treated with the condensation heat, the mixed air can be used as a heat source for regenerating the dehumidifying solution in the solution regenerator at the moment, the solution regenerator is arranged behind the second condenser, the high-temperature mixed air passes through the solution regenerator, takes away the moisture in the solution regenerator and then is discharged outdoors, and the concentration of the solution in the solution regenerator is increased to be regenerated.
in the solution-assisted composite fresh air processing unit, solution spraying self-circulation is arranged in the solution dehumidifier and the solution regenerator, and a solution exchange pipeline is arranged in front of the solution dehumidifier and the solution regenerator and used for solution exchange between a dilute solution with reduced concentration after dehumidification and a concentrated solution with increased concentration after regeneration so as to maintain the dehumidification capacity of the unit.
In the invention, in the solution dehumidification regeneration cycle, the used solution is a lithium bromide solution, a lithium chloride solution, a calcium chloride solution or a mixed solution of lithium chloride and calcium chloride, and lithium bromide and calcium chloride; in order to prevent the problem of air carrying liquid in the solution dehumidifier and the solution regenerator, the dehumidifying core body and the regenerating core body both adopt a selective permeability membrane structure.
has the advantages that: compared with the prior art, the invention has the following advantages:
(1) Compared with the traditional fresh air handling unit which completely adopts a mechanical dew point dehumidification method, the fresh air handling unit has the advantages that the used cold source and the vapor compression refrigeration cycle have higher evaporation temperature, so that the required additional cold water handling unit and the fresh air handling unit have lower energy consumption, in addition, the fresh air heat regeneration process is realized by adopting solution dehumidification cycle, and the heat source for driving the solution dehumidification cycle is the condensation heat of the fresh air handling unit, so that the energy waste of the fresh air heat regeneration process of the traditional handling unit is avoided;
(2) compared with the existing heat pump-driven solution dehumidification fresh air handling unit, the energy transfer mode between the steam compression type refrigeration cycle and the solution dehumidification cycle is air transfer, so that the direct heat exchange process between the solution and the refrigerant is avoided, corrosion-resistant expensive materials are not required for equipment manufacturing, the manufacturing cost is reduced, and the problems of overhigh pressure and unstable performance in an evaporator or a condenser in a type of direct contact between the solution and the refrigerant are solved;
(3) The cold source used by the surface air cooler for pre-cooling and pre-dehumidifying the fresh air is high-temperature cold water at the temperature of 16-18 ℃, the high-temperature cold water is provided by an additional water chilling unit used on site, the energy consumption of the high-temperature water chilling unit is far lower than that of a water chilling unit required to be configured in a conventional air conditioning system, and the energy-saving effect of the air conditioning system is further improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
The figure shows that: the system comprises a surface air cooler 1, an evaporator 2, a compressor 3, a first condenser 4, a second condenser 5, an expansion valve 6, a solution dehumidifier 7, a dehumidifying solution pump 8, a first fan 9, a solution regenerator 10, a regenerating solution pump 11 and a second fan 12.
Detailed Description
The specific embodiments of the present invention will be further described with reference to the following examples and drawings.
As shown in fig. 1, the solution-assisted composite fresh air handling unit of the present invention is mainly composed of a surface air cooler 1, a vapor compression refrigeration cycle and a solution dehumidification cycle, and the devices are mainly distributed in two air ducts, namely a first air duct and a second air duct.
the fresh air processing process of the solution-assisted composite fresh air processing unit is completed in the first air duct; the inlet of the first air duct is provided with a surface air cooler 1, 16-18 ℃ high-temperature cold water is introduced into a cooling coil of the surface air cooler 1 to serve as a cold source, the inlet of the cooling coil is connected with a high-temperature cold water supply pipeline, the outlet of the cooling coil is connected with a high-temperature cold water return pipeline, the high-temperature cold water is provided by an additional high-temperature cold water unit matched with the building, outdoor fresh air with high temperature and high humidity in summer can be dehumidified and cooled when passing through the surface air cooler 1, and the cooling and dehumidifying capacity of the 16-18 ℃ high-temperature cold water serving as the cold source is limited, so that the surface air cooler 1 performs pre-dehumidification and pre-cooling treatment on the fresh air and has the effect of reducing the load to be born;
The evaporator 2 of the vapor compression refrigeration cycle is arranged right behind the surface cooler 1 in the first air channel of the solution-assisted composite fresh air processing unit, fresh air pretreated by the surface cooler 1 is further dehumidified and cooled when passing through the evaporator 2, the evaporation temperature of a refrigerant in the evaporator 2 is lower than the dew point temperature of the fresh air passing through the evaporator 2 when the vapor compression refrigeration cycle operates, the dehumidification principle of the fresh air by the evaporator 2 is mechanical dew point dehumidification, the temperature of the fresh air after being processed by the evaporator 2 is lower than the air supply temperature requirement, and the humidity of the fresh air is still higher than the air supply humidity requirement, because the fresh air is pretreated by the surface air cooler 1 before entering the evaporator 2, the cold consumption in the evaporator 2 is effectively reduced, and because the borne moisture load is reduced, the evaporation temperature of the evaporator 2 during operation is correspondingly increased, and the energy consumption of the whole vapor compression refrigeration cycle can be effectively controlled;
A solution dehumidifier 7 is arranged right behind an evaporator 2 in a first air channel of the solution-assisted composite fresh air processing unit, when fresh air passes through the solution dehumidifier 7, heat transfer and mass transfer are carried out between the fresh air and a dehumidifying solution in the solution dehumidifier 7, moisture in the fresh air is taken away by the solution, heat in the solution can be transferred to the fresh air, the temperature of the fresh air is increased and the humidity of the fresh air is reduced to meet the requirement of an air supply state after the fresh air passes through the solution dehumidifier 2, the solution dehumidifier 2 has the functions of heat regeneration and humidity processing, and at the moment, the concentration of the dehumidifying solution in the solution dehumidifier 2 becomes lower after the dehumidifying solution absorbs the moisture in the;
A solution-assisted composite fresh air processing unit finishes precooling, pre-dehumidification, condensation, dehumidification and reheating treatment of fresh air in a first air channel sequentially comprising a surface cooler 1, an evaporator 2 and a solution dehumidifier 7.
The vapor compression refrigeration cycle in the solution-assisted composite fresh air processing unit mainly comprises an evaporator 2, a compressor 3, a first condenser 4, a second condenser 5 and an expansion valve 6; the outlet of the refrigerant coil of the evaporator (2) is connected with the inlet of the compressor (3), and the inlet of the refrigerant coil is connected with the outlet of the expansion valve (6); the condensation heat of the vapor compression type refrigeration cycle is divided into two parts for treatment, one part of the condensation heat is borne by high-temperature cold water, the other part of the condensation heat is borne by mixed air of fresh air and room return air and then used for solution regeneration, a refrigerant pipeline behind the outlet of the compressor 3 is divided into two parallel-connected paths, one path is connected to a refrigerant inlet of the first condenser 4, and the other path is connected to a refrigerant inlet of the second condenser 5;
The first condenser 4 and the surface air cooler 1 share 16-18 ℃ high-temperature cold water, the inlet of a cooling water coil pipe of the first condenser is connected with a high-temperature cold water supply pipeline, the outlet of the cooling water coil pipe is connected with a high-temperature cold water return pipeline, and the outlet of a refrigerant pipeline is connected to the inlet of an expansion valve 6; the condensation heat of the second condenser 5 is treated by air, the second condenser 5 is arranged at the inlet of the second air duct, and the outlet of the refrigerant pipe thereof is also connected to the inlet of the expansion valve 6.
The solution-assisted composite fresh air processing unit finishes condensation heat treatment of a second condenser 5 and a solution regeneration process of a solution regenerator 10 in a second air channel, mixed air of return air and fresh air of an air-conditioning room is introduced into the second air channel, and the temperature and the humidity of the mixed air are lower than those of the ambient fresh air, so that the condensation heat treatment and the solution regeneration are facilitated; the second condenser 5 is arranged at the inlet of the second air duct, and the mixed air carries away condensation heat when passing through the second condenser 5, so that the temperature of the mixed air is greatly increased; the solution regenerator 10 is arranged right behind the second condenser 5 in the second air channel, the high-temperature mixed air is subjected to heat and mass transfer with the solution in the solution regenerator 10 when passing through the solution regenerator, the moisture in the solution enters the high-temperature mixed air, and the concentration of the solution is increased; the high-temperature and high-humidity air passing through the solution regenerator 10 is finally discharged into the environment;
In the solution dehumidification regeneration cycle of the solution-assisted composite fresh air processing unit, solution exchange is carried out between the solution dehumidifier 7 and the solution regenerator 10 through a circulation pipeline, a diluted solution obtained after dehumidification in the solution dehumidifier 7 enters the solution regenerator 10 to complete regeneration, and a solution with increased concentration in the solution regenerator 10 enters the solution dehumidifier 7 to maintain the concentration of the solution required for bearing fresh air humidity load; wherein, the bottom of the solution dehumidifier 7 is provided with two solution outlets, the first outlet is connected to the inlet of the dehumidifying solution pump 8, and the second outlet is connected to the inlet of the regenerating solution pump 11; the bottom of the solution regenerator 10 is provided with two solution outlets, the first outlet is connected to the inlet of a regeneration solution pump 11, and the second outlet is connected to the inlet of a dehumidification solution pump 8; the power of the dehumidifying solution self-circulation in the solution dehumidifier 7 and the regenerated concentrated solution from the second outlet of the solution regenerator 10 to the solution dehumidifier 7 is borne by a dehumidifying solution pump 8; the regeneration solution self-circulation in the solution regenerator 10 and the power of the dehumidified dilute solution from the second outlet of the solution dehumidifier 7 to the solution regenerator 10 are provided by a regeneration solution pump 11.
In the solution-assisted composite fresh air processing unit, a first fan 9 is arranged at the air supply end of a first air channel and used for providing power for fresh air flowing in the first air channel and completing air supply; the air exhaust end of the second air duct is provided with a second fan 12 for providing power for the flow of the mixed air in the second air duct and completing air exhaust.
Claims (4)
1. A solution-assisted composite fresh air processing unit is characterized by comprising a first air channel and a second air channel which are arranged in parallel, a surface cooler (1), an evaporator (2), a solution dehumidifier (7), a second condenser (5) arranged in the second air channel, a solution regenerator (10), a high-temperature cold water supply pipeline connected with an inlet of a cooling water coil of the surface cooler (1), a high-temperature cold water return pipeline connected with an outlet of the cooling water coil of the surface cooler (1), a first condenser (4) connected with the evaporator (2) through a compressor (3) and an expansion valve (6), a dehumidifying solution pump (8) connected with the solution dehumidifier (7), and a regenerating solution pump (11) connected with the solution regenerator (10);
The surface cooler (1) is arranged at an inlet of the first air channel, a refrigerant coil outlet of the evaporator (2) is connected with an inlet of the compressor (3), and a refrigerant coil inlet of the evaporator (2) is connected with an outlet of the expansion valve (6); a refrigerant pipeline connected with the outlet of the compressor (3) is divided into two paths which are connected in parallel, one path is connected to a refrigerant inlet of the first condenser (4), and the other path is connected to a refrigerant inlet of the second condenser (5); an inlet of a cooling water coil of the first condenser (4) is connected with a high-temperature cold water supply pipeline, an outlet of the cooling water coil of the first condenser (4) is connected with a high-temperature cold water return pipeline, and an outlet of a refrigerant pipeline of the first condenser (4) is connected to an inlet of an expansion valve (6); the second condenser (5) is arranged at the inlet of the second air duct, and the outlet of a refrigerant pipeline of the second condenser is also connected to the inlet of the expansion valve (6);
the bottom of the solution dehumidifier (7) is provided with two solution outlets, wherein the first outlet is connected to the inlet of the dehumidifying solution pump (8), the outlet of the dehumidifying solution pump (8) is connected with the solution spraying device at the top of the solution dehumidifier (7), and the second outlet is connected to the inlet of the regenerating solution pump (11); the solution regenerator (10) is arranged right behind the second condenser (5), the bottom of the solution regenerator (10) is provided with two solution outlets, the first outlet is connected to the inlet of the regeneration solution pump (11), the outlet of the regeneration solution pump (11) is connected to the solution spraying device at the top of the solution regenerator (10), and the second outlet of the solution regenerator (10) is also connected to the inlet of the dehumidification solution pump (8).
2. The solution-assisted composite fresh air handling unit according to claim 1, wherein the first air duct has a first fan (9) at an air supply end thereof, and the second air duct has a second fan (12) at an air discharge end thereof.
3. the solution-assisted composite fresh air handling unit according to claim 1, wherein the high-temperature cold water supply pipeline supplies the 16-18 ℃ high-temperature cold water as a cold source to the surface air cooler (1) and the first condenser (4) at the same time.
4. A solution assisted composite fresh air handling unit according to claim 1, 2 or 3, wherein the first condenser (4) and the second condenser (5) are connected in parallel to handle the heat of condensation of the vapor compression refrigeration cycle, and wherein the heat of condensation in the second condenser (5) is carried by air into the solution regenerator (10) to be used as a heat source for solution regeneration.
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| CN201711101391.6A CN107763762B (en) | 2017-11-09 | 2017-11-09 | compound fresh air handling unit with solution assistance |
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| CN201711101391.6A CN107763762B (en) | 2017-11-09 | 2017-11-09 | compound fresh air handling unit with solution assistance |
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| CN107763762B true CN107763762B (en) | 2019-12-10 |
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|---|---|---|---|---|
| CN108758807B (en) * | 2018-05-25 | 2020-06-16 | 东南大学 | Multistage air deep dehumidification device in ultralow dew point environment |
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Effective date of registration: 20231121 Address after: Room 415, Building 1, Innovation and Entrepreneurship College, No. 8 Yuanhua Road, Xianlin University City, Xianlin Street, Qixia District, Nanjing City, Jiangsu Province, 210033 Patentee after: Jiangsu new Dongbo Construction Technology Co.,Ltd. Address before: 211800 No. 6, Dongda Road, Taishan new village, Pukou District, Nanjing City, Jiangsu Province Patentee before: SOUTHEAST University |