CN114076365A - A container data center using indirect evaporative cooling - Google Patents
A container data center using indirect evaporative cooling Download PDFInfo
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- CN114076365A CN114076365A CN202010807113.8A CN202010807113A CN114076365A CN 114076365 A CN114076365 A CN 114076365A CN 202010807113 A CN202010807113 A CN 202010807113A CN 114076365 A CN114076365 A CN 114076365A
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- 238000001816 cooling Methods 0.000 title claims abstract description 78
- 238000004378 air conditioning Methods 0.000 claims abstract description 51
- 238000001704 evaporation Methods 0.000 claims abstract description 50
- 230000008020 evaporation Effects 0.000 claims abstract description 50
- 238000005057 refrigeration Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 104
- 239000007921 spray Substances 0.000 claims description 23
- 238000002156 mixing Methods 0.000 claims description 9
- 239000010865 sewage Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 2
- 230000005494 condensation Effects 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 description 17
- 238000001914 filtration Methods 0.000 description 9
- 230000017525 heat dissipation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000012528 membrane Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0035—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using evaporation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a container data center adopting an indirect evaporative cooling mode, which is formed by connecting an indirect evaporative precision air-conditioning unit and a container IT bearing unit. The indirect evaporation precise air conditioning unit adopts a dew point type evaporation cooling design, external air is pre-cooled and then is fully humidified, the temperature of the humidified air can be lower than that of a wet bulb, and the circulating return air temperature in summer can be lower than that of a conventional indirect evaporation cooling mode; in addition, the design of an evaporative condenser is adopted, the operating condensation temperature and pressure of a mechanical refrigeration system are reduced, and the refrigeration efficiency of the system is improved by utilizing an evaporative cooling mode to the maximum extent. The whole design is compact and efficient, a natural cold source can be fully utilized, and the energy consumption of the data center is reduced.
Description
Technical Field
The invention relates to application occasions such as data center refrigeration and the like, in particular to a container data center adopting an indirect evaporative cooling mode.
Background
With the comprehensive development of economic information construction in China, the more and more container data center machine rooms are in practical application due to the characteristics of economy, convenience and rapid deployment and the like, and the heat dissipation, energy conservation and consumption reduction of the container data center are more and more important. At present, most of conventional container data center air conditioning systems adopt air-cooled air conditioners, and natural cold sources are not fully utilized. The invention adopts an indirect evaporative cooling mode, the compressor is required to be started for refrigeration only when the temperature is higher in summer, and outdoor air can be used for cooling in other seasons by the indirect evaporative cooling mode.
Disclosure of Invention
The container data center adopts an indirect evaporative cooling mode, a front channel and a rear channel of a rack are used as cold and hot channels, an air inlet of an indirect evaporative precision air conditioner is connected with the hot channel, and an air outlet of the indirect evaporative precision air conditioner is connected with the cold channel; the whole design is compact and efficient, a natural cold source can be fully utilized, and the energy consumption of the data center is reduced.
The indirect evaporative cooling part of the invention adopts dew point evaporative cooling design, external air is precooled and then humidified again, the temperature of the humidified air can be lower than the temperature of wet bulb, and the temperature of circulating return air in summer can be lower than that of the conventional indirect evaporative cooling mode. The invention also adopts the design of an evaporative condenser, reduces the operating condensation temperature and pressure of the mechanical refrigeration system, and improves the refrigeration efficiency of the system by utilizing an evaporative cooling mode to the maximum extent. In order to adapt to the low temperature of cold regions, the invention designs the air mixing device which is used for controlling the temperature of the external circulation inlet air and preventing the internal circulation channel from dewing and freezing.
The purpose of the invention is realized by adopting the following technical scheme:
a container data center adopting an indirect evaporative cooling mode comprises an indirect evaporative precise air-conditioning unit and a container IT supporting unit, the indirect evaporation precise air conditioning unit comprises a shell, a wet film evaporation cooling module, an external circulation air inlet, an internal circulation air inlet, a dividing wall type air-air sensible heat exchanger, an external circulation air outlet, an internal circulation fan, an external circulation fan and a controller, the internal circulation air inlet, the dividing wall type air-air sensible heat exchanger, the internal circulation fan and the internal circulation air outlet are sequentially connected together to form an internal circulation channel, the external circulation air inlet, the wet film evaporation cooling module, the dividing wall type air-air sensible heat exchanger, the external circulation fan and the external circulation air outlet are sequentially connected together to form an external circulation channel;
the container IT supporting unit comprises a container, a rack, a PDU module, a UPS module, a power distribution module, a network distribution module, a weak current control module and an automatic fire extinguishing and fire fighting device, wherein the rack, the UPS module and the power distribution module are connected and arranged in the middle of the container to divide the container into two parts to form a cold channel and a hot channel;
the internal circulation air inlet is communicated with the hot channel, and the internal circulation air outlet is communicated with the cold channel;
the inner circulation fan and the outer circulation fan are electrically connected with the controller.
3. Preferably, the wet film
The evaporation cooling module comprises an air filtering module, an air pre-cooling module, a humidifying wet film, a circulating water pump, a water distributor, a water collecting tray, a water storage tank and a sewage discharge valve, the air filtering module is located at the position of an outer circulating air inlet, the air pre-cooling module and the humidifying wet film are sequentially located between the air filtering module and the dividing wall type air-air sensible heat exchanger, the water distributor is located right above the humidifying wet film, the water collecting tray is located right below the humidifying wet film, the water storage tank is located right below the water collecting tray, the water collecting tray is connected with the water storage tank through a pipeline, a water inlet of the circulating water pump is connected with the water storage tank through a pipeline, a water outlet of the circulating water pump is connected with an inlet of the air pre-cooling module through a pipeline, an outlet of the air pre-cooling module is connected with the water distributor, and the circulating water pump is connected with the water distributor, The sewage discharge valve is electrically connected with the controller.
Preferably, the air pre-cooling module is a metal wet film.
Preferably, the air pre-cooling module is a finned tube heat exchanger, a water inlet of the finned tube heat exchanger is connected with a water outlet of the circulating water pump through a pipeline, and a water outlet of the finned tube heat exchanger is connected with the water distributor through a pipeline.
Preferably, the indirect evaporation precise air conditioning unit further comprises a mechanical refrigeration device, the mechanical refrigeration device comprises a condenser fan, a compressor, an evaporator and an evaporative condenser, the evaporator is located between the inner circulation air outlet and the dividing wall type air-air sensible heat exchanger, the evaporative condenser comprises a condenser, a spraying module and a temperature sensor, the temperature sensor is installed on the condenser, the spraying module is located in front of the condenser, and the temperature sensor, the compressor and the spraying module are electrically connected with the controller.
Preferably, the indirect evaporation precision air conditioning unit further comprises a spray humidification module, the spray humidification module is located between the humidification wet film and the dividing wall type air-air sensible heat exchanger, and the spray humidification module is electrically connected with the controller.
Preferably, the indirect evaporation precision air conditioning unit still includes mixes the wind device, mix the wind device and be located the extrinsic cycle air intake with between the extrinsic cycle fan, mix the wind device and include air guide channel, blast gate and temperature sensor, the blast gate is located in the air guide channel, temperature and humidity sensor installs being close in the air guide channel one side of extrinsic cycle air intake, the blast gate temperature and humidity sensor with controller electric connection.
Preferably, the external circulation fan is a centrifugal fan, and the internal circulation fan is a centrifugal fan.
Preferably, the condenser fan is an axial fan.
Preferably, the container data center comprises two indirect evaporation precise air-conditioning units and two container IT supporting units, the two indirect evaporation precise air-conditioning units are combined together side by side in a mirror symmetry mode to form an indirect evaporation precise air-conditioning unit combination, and the two container IT supporting units are respectively located on two sides of the indirect evaporation precise air-conditioning unit combination and are respectively communicated with the indirect evaporation precise air-conditioning unit combination.
Compared with the prior art, the invention has the beneficial effects that: through the arrangement of the air pre-cooling module, the humidifying wet film and the spraying humidifying module, external air is pre-cooled and then is fully humidified, the temperature of the humidified air can be lower than that of a wet bulb, and the cooling effect that the circulating return air temperature is lower than that of a conventional indirect evaporative cooling mode in summer is achieved; the spraying module is arranged to perform spraying cooling on the condenser, so that the operating condensing temperature and pressure of the mechanical refrigerating system are reduced, an evaporation cooling mode is utilized to the maximum extent, and the refrigerating efficiency of the system is improved; through setting up the device that mixes wind for when low temperature in winter, the hot-blast ability through the condenser in the outer circulation passageway is carried out neutralization and is heated up to outer circulation inlet air temperature, prevents that interior circulation passageway from appearing dewing and icing phenomenon.
Drawings
FIG. 1 is a schematic structural diagram of a container data center using indirect evaporative cooling in accordance with the present invention;
FIG. 2 is a schematic structural diagram of a container data center using indirect evaporative cooling according to the present invention;
FIG. 3 is a schematic diagram of a water circulation system in the air pre-cooling module according to the present invention;
10. a container IT receiving unit; 11. a frame; 12. a UPS module; 13. a power distribution module; 14. a hot aisle; 15. a cold aisle; 20. an indirect evaporative precision air conditioning unit; 21. an internal circulation air inlet; 22. a dividing wall air-to-air sensible heat exchanger; 23. an internal circulation fan; 24. an internal circulation air outlet; 25. an external circulation air inlet; 26. an external circulation fan; 27. an external circulation air outlet; 28. a spray humidifying module; 301. an air filtration module; 302. an air pre-cooling module; 303. humidifying the wet film; 304. a water distributor; 305. a water collection tray; 306. a water storage tank; 307. a water circulating pump; 31. a compressor; 32. an evaporator; 331. a condenser; 332. a temperature sensor; 333. a spraying module; 34. a condenser fan; 35. an air valve; 36. temperature and humidity sensor.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a container data center adopting an indirect evaporative cooling mode, i.e. a container data center adopting an indirect evaporative cooling mode, which is composed of an indirect evaporative precise air-conditioning unit 20 and a container IT receiving unit 10, wherein the indirect evaporative precise air-conditioning unit 20 is communicated with the container IT receiving unit through an air channel, the indirect evaporative precise air-conditioning unit 20 performs heat dissipation and cooling on the container IT receiving unit 10, in order to build the data center on site, the container IT receiving unit is modularized, the data center is formed by assembling and splicing N modularized container IT receiving units, the indirect evaporative precise air-conditioning unit is certainly used as a heat dissipation and cooling matching device of the container IT receiving unit, is also modularized, the size of an external frame of the indirect evaporative precise air-conditioning unit is consistent with that of the container IT receiving unit, and the transportation is convenient, the indirect evaporation precise air conditioning unit 20 and the container IT receiving unit 10 are specifically introduced below in terms of structure construction, so as to save space and time.
The indirect evaporation precise air conditioning unit 20 comprises a shell, a wet film evaporation cooling module arranged in the shell or fixed on the shell body of the shell, an external circulation air inlet 25, an internal circulation air inlet 21, a dividing wall type air-air sensible heat exchanger 22, an external circulation air outlet 27, an internal circulation air outlet 24, an internal circulation fan 23, an external circulation fan 26 and a controller. In order to make the space of the indirect evaporation precision air conditioning unit 20 more compact, it is preferable that the external circulation fan 26 and the internal circulation fan 23 are centrifugal fans. In this embodiment, the internal circulation air inlet 21, the dividing wall type air-air sensible heat exchanger 22, the internal circulation fan 23, and the internal circulation air outlet 24 are sequentially connected together to form an internal circulation channel, and the direction indicated by the arrow a-a in fig. 1 is the direction of the circulation flow of the hot air in the container IT receiving unit 10 in the internal circulation channel; the external circulation air inlet 25, the wet film evaporation cooling module, the dividing wall type air-air sensible heat exchanger 22, the external circulation fan 26 and the external circulation air outlet 27 are sequentially connected together to form an external circulation channel, the direction indicated by the arrow B-B in fig. 1 is the direction in which the natural cold air in the indirect evaporation precise air conditioning unit 20 circularly flows in the external circulation channel, in this embodiment, the wet film evaporation cooling module plays a role in cooling and humidifying the natural cold air coming from the outside, in order to enable the external natural cold air to be cooled more greatly by the wet film evaporation cooling module, in this embodiment, a combination of air pre-cooling and wet film humidification is preferably adopted to cool and humidify the natural cold air, specifically, the wet film evaporation cooling module includes an air filtering module 301, an air pre-cooling module 302, a humidifying wet film 303, a circulation water pump 307, a water distributor 304, a water distributor, and a water distributor, A water collecting tray 305, a water storage tank 306 and a sewage discharge valve (not shown in the figure), wherein the air filtering module 301 is located at the external circulation air inlet 27, the external natural cold air is filtered by the air filtering module 301 and enters into the external circulation channel, the air filtering module 301 can prevent the external natural cold air from remaining in the dividing wall type air-air sensible heat exchanger 22 with some small objects and causing blockage, the air pre-cooling module 302 and the humidifying wet membrane 303 are sequentially located between the air filtering module 301 and the dividing wall type air-air sensible heat exchanger 22, as shown in fig. 3, the water distributor 304 is located right above the humidifying wet membrane 303, the water collecting tray 305 is located below the humidifying wet membrane 303, the water collecting tank is located below the water collecting tray, the water inlet of the circulating water pump 307 is connected with the water storage tank 306 through a pipeline, the water outlet of the circulating water pump 307 is connected with the air pre-cooling module 302 through a pipeline, the water outlet of the air pre-cooling module 302 is connected with the water distributor 304 through a pipeline, the circulating water pump and the sewage discharge valve are electrically connected with the controller, so that the circulating water pump is started, the circulating water pump pumps water in the water storage tank to the air pre-cooling module, the water is output to the water distributor after the water is output from the air pre-cooling module, the water distributor uniformly sprays the humidified wet film 303 to enable the surfaces of all layers of the humidified wet film 303 to be fully distributed with water to form water curtains, circulating water in the humidified wet film falls into a water collecting tray, the water collecting tray is connected with the water storage tank through a pipeline, natural cold air is pre-cooled by the air pre-cooling module 302 and then humidified by the humidified wet film 303 and is changed into high-humidity cold air, in order to improve the heat exchange pre-cooling efficiency of the natural cold air and the air pre-cooling module, in the embodiment, the air pre-cooling module 302 is preferably a metal wet film, more preferably a finned tube heat exchanger, wherein a water inlet of the finned tube heat exchanger is connected with a water outlet of the circulating water pump through a pipeline, and a water outlet of the finned tube heat exchanger is connected with the water distributor through a pipeline, therefore, the circulating water pump is started, the circulating water pump pumps water in the water collecting tank to be sent to the finned tube heat exchanger, the water is sent out through the finned tube heat exchanger and sent to the water distributor, the water distributor uniformly sprays the humidifying wet film 303 to enable the surfaces of all layers of the humidifying wet film to be fully covered with water to form a water curtain, natural cold air is pre-cooled through the finned tube heat exchanger and then is humidified through the humidifying wet film 303, and the natural cold air is changed into high-humidity cold air. After the water source in the water storage tank is recycled for a period of time, the water storage tank needs to be drained, and the drain valve is opened to drain the sewage in the water storage tank.
In this way, the hot air in the container IT receiving unit 10 exchanges heat with the natural cold air pre-cooled and humidified in the indirect evaporation precision air conditioning unit 20 in the dividing wall type air-air sensible heat exchanger 22, after the exchange is completed, the hot air is cooled, the natural cold air is heated, the hot air is returned to the container IT receiving unit 10 after being cooled, and the natural cold air is discharged to the outside of the indirect evaporation precision air conditioning unit 20 through the external circulation air outlet 27 after being heated. After the external natural cold air exchanges heat with the interior of the container IT receiving unit 10, the purposes of heat dissipation and cooling of the container IT receiving unit 10 are achieved.
Generally, the container IT receiving unit 10 includes a container, a rack 11, a PDU module, a UPS module 12, a power distribution module 13, a network distribution module, a weak current control module, and an automatic fire extinguishing and fire fighting device, in this embodiment, the rack, the UPS module 12, and the power distribution module 13 are connected and arranged in the middle of the container, and divide the container into two parts, forming a cold aisle 15 and a hot aisle 14.
The indirect evaporation precise air conditioning unit 20 and the container IT receiving unit 10 are used as independent units, and physical connection is needed to realize energy exchange of hot and cold air, and in this embodiment, the specific connection mode is as follows: an internal circulation air inlet 21 of the indirect evaporation precise air conditioning unit 20 is communicated with the hot channel 14 through a pipeline, an internal circulation air outlet 24 of the indirect evaporation precise air conditioning unit 20 is communicated with the cold channel 15 through a pipeline, therefore, hot air in the hot channel 14 of the container IT receiving unit 10 enters the internal circulation channel of the indirect evaporation precise air conditioning unit 20 through the internal circulation air inlet 21 to exchange heat with natural cold air, after the heat exchange is finished, the hot air flows back to the cold channel 15 of the container IT receiving unit 10 through the internal circulation air outlet 24, and the process is repeated.
Of course, the opening and closing of the internal circulation fan 23 and the external circulation fan 26 are both intelligently controlled, in this embodiment, the internal circulation fan 23 and the external circulation fan 26 are electrically connected to the controller, and the controller intelligently controls the opening and closing of the internal circulation fan 23 and the external circulation fan 26.
As is known, the temperature of natural cold wind changes with the change of seasons. In order to solve the problem that the temperature difference between the natural cold air and the hot air in the container IT receiving unit 10 becomes small when the temperature of the natural cold air rises, and the temperature difference between the natural cold air and the hot air in the container IT receiving unit 10 becomes small when the temperature difference is too small to reduce the heat in the container IT receiving unit 10 to a certain value, the servers in the container IT receiving unit 10 may have various problems, such as the operation speed of the servers becomes slow and more serious, and the components may fire, and then the servers need to be matched with an external refrigeration system to perform refrigeration and cooling, in this embodiment, the indirect evaporation precision air conditioning unit 20 further includes a mechanical refrigeration device, specifically, the mechanical refrigeration device includes a condenser fan 34, a compressor 31, an evaporator 32 and an evaporative condenser, in this embodiment, the condenser fan 34 is preferably an axial flow fan, and the evaporator 32 is located between the internal circulation air outlet 24 and the dividing wall type air-air sensible heat exchanger 22, the hot air after heat exchange and temperature reduction from the dividing wall type air-air sensible heat exchanger 22 is cooled again by the evaporator 32, the hot air after secondary temperature reduction is changed into cold air which is discharged from the internal circulation air outlet 24 into the cold channel 15 in the container IT receiving unit 10, in order to reduce the energy consumption of the whole refrigeration system, the heat dissipation pressure of the condenser needs to be reduced, and the heat dissipation and temperature reduction speed of the condenser is increased, in this embodiment, a spray evaporation cooling manner is adopted for the condenser, specifically, the evaporative condenser comprises a condenser 331, a spray module 333 and a temperature sensor 332, the condenser 331 is connected with the compressor 31, the evaporator 32 through a capillary tube and an expansion valve to form the refrigeration system, the temperature sensor 332 is installed on the condenser 331, the temperature sensor 332 detects the ambient temperature and humidity of the condenser 331, and the spray module 333 is located in front of the condenser 331, the spraying module 333 is connected to the finned pipeline of the condenser 331 through water mist spraying, the refrigerant in the pipeline of the condenser 331 is cooled through water mist evaporation and heat absorption, the temperature sensor 332, the compressor 31, the spraying module 333 and the condenser fan 34 are all electrically connected with the controller, the temperature sensor 332 detects a temperature value transmission controller, and the controller performs matching control on the spraying amount of the spraying module 333 and the air draft amount of the condenser fan 34 according to a detected temperature result, so that the temperature of the condenser is reduced to a required value.
In order to make the temperature lower and the humidity higher after the natural cold air enters the indirect evaporation precision air conditioning unit, in the embodiment, preferably, a spray humidification mode is adopted for natural cold air, and particularly, the indirect evaporation precision air conditioning unit further comprises a spray humidification module 28, the spray humidification module 28 is located between the humidification wet film 303 and the dividing wall type air-air sensible heat exchanger 22, and the spray humidification module 28 sprays and humidifies the external natural cold air after the external natural cold air enters the inner circulation channel, so that the temperature of the natural cold air is reduced, the humidity of the natural cold air is increased, when the natural cold wind temperature drops to be close to the wet bulb temperature and forms the drop of water, the drop of water evaporates in dividing wall type air-air sensible heat exchanger 22 and cools down the hot air of heat channel 14, and spraying humidification module 28 and controller electric connection, the controller carries out intelligent control according to the natural cold wind humiture of extrinsic cycle air intake 27 to the spray capacity of spraying humidification module 28.
In order to prevent the phenomenon that the external natural cold air has too low temperature and frosts and freezes at the dividing wall type air-air sensible heat exchanger in winter, the heat exchange function of the dividing wall type air-air sensible heat exchanger is deteriorated, in this embodiment, the external self-heating cold air mixing temperature is increased by using hot air, specifically, the indirect evaporation precision air conditioning unit further comprises an air mixing device, the air mixing device is positioned between the external circulation air inlet 25 and the external circulation fan 26, the air mixing device controls ventilation and isolation between the hot air after heat exchange of the external circulation channel and the natural cold air before heat exchange of the external circulation channel, specifically, the air mixing device comprises an air guide channel, an air valve 35 and a temperature and humidity sensor 36, the air guide channel is communicated with the external circulation air outlet 27 and the external circulation air inlet 25, the air valve 35 is positioned in the air guide channel, the air valve 35 is opened, and the hot air after heat exchange of the external circulation channel is communicated with the natural cold air before heat exchange of the external circulation channel, the temperature of the natural cold air rises, the air valve 35 is closed, the hot air after the heat exchange of the outer circulation channel is isolated from the natural cold air before the heat exchange of the outer circulation channel, the temperature and humidity sensor 36 is installed on one side, close to an outer circulation air inlet, of the air guide channel, the air valve 35, the temperature and humidity sensor 36 is electrically connected with the controller, the temperature and humidity sensor detects the temperature and humidity of the natural cold air entering the dividing wall type air-air sensible heat exchanger 22 in the outer circulation channel, the detected result is transmitted to the controller, the controller opens the spray volume of the spray humidification module 28 according to the temperature and humidity of the natural cold air of the outer circulation air inlet 25, and the air valve 35 is intelligently controlled.
However, in practice, the number of the container IT receiving units is usually not one, and most of the time, two or more than two, and at this time, the corresponding number of the indirect evaporation precise air conditioning units needs to be correspondingly cooled and radiated, in this embodiment, the two container IT receiving units are cooled and radiated, preferably, two indirect evaporation precise air conditioning units are combined together in a mirror symmetry manner to cool and radiate the two container IT receiving units, as shown in fig. 2, fig. 2 is a schematic diagram of a structure of a container data center adopting an indirect evaporation cooling method in the invention shown in fig. 1, specifically, the container data center is composed of two indirect evaporation precise air conditioning units 20 and two container IT receiving units 10, the two indirect evaporation precise air conditioning units 20 are combined together in a mirror symmetry mode in parallel to form an indirect evaporation precise air conditioning unit combination, and the two container IT supporting units 10 are respectively positioned on two sides of the indirect evaporation precise air conditioning unit combination and are communicated with the indirect evaporation precise air conditioning unit combination. Of course, for a larger number of container IT receiving units, a corresponding number of indirect evaporative precision air conditioning units may be combined into one unit.
The operation of the indirect evaporation precise air conditioner is controlled as follows: when the cold quantity requirement is below a first set value, a compressor and a condenser fan are closed, an internal circulating fan and an external circulating fan are opened, natural cold air is used for cooling and radiating the IT container bearing unit, meanwhile, when the external temperature is lower than a second set value, an air valve is opened, and when the external temperature is higher than the second set value, the air valve is closed; when the cold quantity requirement is above a first set value, the compressor, the condenser fan, the internal circulation fan and the external circulation fan are started, the natural air cooling is used for primary cooling, and the cold quantity of the refrigerating system is used for secondary cooling.
According to the invention, the air pre-cooling module, the humidifying wet film and the spraying humidifying module are arranged, so that external air is pre-cooled and then is fully humidified, the temperature of the humidified air can be lower than that of a wet bulb, and the cooling effect that the circulating return air temperature is lower than that of a conventional indirect evaporative cooling mode in summer is achieved; the spraying module is arranged to perform spraying cooling on the condenser, so that the operating condensing temperature and pressure of the mechanical refrigerating system are reduced, an evaporation cooling mode is utilized to the maximum extent, and the refrigerating efficiency of the system is improved; through setting up the device that mixes wind for when low temperature in winter, the hot-blast ability through the condenser in the outer circulation passageway is carried out neutralization and is heated up to outer circulation inlet air temperature, prevents that interior circulation passageway from appearing dewing and icing phenomenon.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes should fall within the scope of the claims of the present invention.
Claims (10)
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| CN202010807113.8A CN114076365A (en) | 2020-08-12 | 2020-08-12 | A container data center using indirect evaporative cooling |
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| CN202010807113.8A CN114076365A (en) | 2020-08-12 | 2020-08-12 | A container data center using indirect evaporative cooling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745904A (en) * | 2022-03-07 | 2022-07-12 | 新疆华奕新能源科技有限公司 | Air conditioning unit for container data center based on solar power generation and evaporative cooling |
Citations (9)
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| CN114745904B (en) * | 2022-03-07 | 2025-02-07 | 新疆华奕新能源科技股份有限公司 | Air conditioning unit for container data center based on solar power generation and evaporative cooling |
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