CN113154565A - Indirect evaporative cooling method, apparatus and system - Google Patents
Indirect evaporative cooling method, apparatus and system Download PDFInfo
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- CN113154565A CN113154565A CN202110468673.XA CN202110468673A CN113154565A CN 113154565 A CN113154565 A CN 113154565A CN 202110468673 A CN202110468673 A CN 202110468673A CN 113154565 A CN113154565 A CN 113154565A
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
An indirect evaporative cooling method, apparatus and system are disclosed. An indirect evaporative cooling method comprising: determining the working mode of the system according to the outdoor temperature; the working modes comprise: dry operating mode, wet operating mode and mechanical cold-compensating mode. The indirect evaporative cooling method makes full use of a natural cold source, and can obtain an obvious water-saving effect compared with the traditional chilled water cooling system.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an indirect evaporative cooling method, indirect evaporative cooling equipment and an indirect evaporative cooling system.
Background
A cooling system of a data center generally adopts traditional chilled water for cooling, and a traditional chilled water method needs a large amount of water resource consumption and water resource waste is serious.
Disclosure of Invention
It is a primary object of the present application to provide an indirect evaporative cooling method, apparatus and system to address the above-mentioned problems.
In order to achieve the above object, according to one aspect of the present application, there is provided an indirect evaporative cooling method applied to a central controller, including:
receiving an outdoor air temperature value detected by a temperature sensor;
determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: dry operating mode, wet operating mode and mechanical cold-compensating mode.
In one embodiment, determining a dry-mode operating mode based on outdoor temperature includes:
if the outdoor temperature is less than or equal to a preset first temperature threshold value, controlling an outdoor air supply fan to start to work so as to enable outdoor air to enter a heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, determining a wet condition operating mode based on outdoor temperature includes:
if the outdoor temperature is greater than a preset second temperature threshold value, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, determining the mechanical cooling mode based on the outdoor temperature includes:
if the outdoor air temperature is greater than a preset second temperature threshold value, controlling the outdoor air supply fan to start to work so as to enable the outdoor air to enter the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
In order to achieve the above object, according to a second aspect of the present application, there is provided an indirect evaporative cooling apparatus applied to a central controller, including: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is configured to execute one or more program instructions to perform the method of any one of the above.
According to a third aspect of the present application, an indirect evaporative cooling system comprises the above-mentioned central controller, an outdoor temperature sensor; a heat exchanger;
the outdoor temperature sensor is used for detecting outdoor temperature;
the central controller is used for receiving the outdoor air temperature value detected by the temperature sensor;
determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: a dry operating mode, a wet operating mode and a mechanical cold-compensating mode;
and the heat exchanger is used for exchanging heat between outdoor air and indoor air.
In one embodiment, the air conditioner also comprises an outdoor air supply fan, an indoor air return fan and a heat exchanger air outlet fan;
the central controller is used for controlling the outdoor air supply fan to start working if the outdoor temperature is less than or equal to a preset first temperature threshold value so as to enable outdoor air to enter the heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, the device further comprises a spraying unit;
if the outdoor temperature is smaller than the preset second temperature threshold and larger than the preset first temperature threshold, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, the refrigerator further comprises a mechanical refrigeration unit;
the central controller is used for controlling the outdoor air supply fan to start working if the temperature of the outdoor air is greater than or equal to a preset second temperature threshold value so as to enable the outdoor air to enter the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
The indirect evaporative cooling system adopts three operation modes, can realize the utilization of a natural cold source to the maximum extent, so as to realize a lower Power Use Efficiency (PUE) value and reduce the energy consumption of a data center; the indoor and outdoor are completely isolated, and compared with a direct evaporative cooling system, the system has no higher requirement on the quality of outdoor air; compared with a traditional chilled water cooling system, the wet working condition of indirect evaporative cooling and the annual operation of a mechanical cold compensation mode only account for 35 percent, water can be saved by over 70 percent, WUE is greatly reduced, and the system has great significance for water-deficient areas; the indirect evaporative cooling system has no particulate matter and harmful gas polluting the inside of the data center, and obviously prolongs the service life of equipment in a machine room.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a flow chart of a method of indirect evaporative cooling according to an embodiment of the present application;
FIG. 2 is a schematic diagram of an indirect evaporative cooling system according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an indirect evaporative cooling apparatus according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an indirect evaporative cooling system according to an embodiment of the present application;
FIG. 4 is a schematic diagram of another indirect evaporative cooling system in accordance with an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
Based on this, the present application proposes an indirect evaporative cooling method, applied to a central controller, referring to a flow chart of an indirect evaporative cooling method shown in fig. 1, the method includes:
step S102, receiving an outdoor air temperature value detected by a temperature sensor;
wherein, a temperature sensor can be arranged outdoors for detecting the outdoor temperature; and converting the detected air temperature value into an electric signal and sending the electric signal to the central controller.
Step S104, determining the working mode of the evaporative cooling system according to the outdoor air temperature; the working modes comprise: dry operating mode, wet operating mode and mechanical cold-compensating mode.
According to the method, three operation modes are designed, and the three operation modes can realize the maximum utilization of a natural cold source so as to realize a lower PUE value and reduce the energy consumption of a data center. Compared with a traditional chilled water cooling system, the wet working condition of indirect evaporative cooling and the mechanical cold-supplementing mode only account for 35% of the year round, water can be saved by over 70%, WUE is greatly reduced, and the system has great significance to water-deficient areas; the application discloses indirect evaporative cooling system, inside no particulate matter and harmful gas pollution data center, show to increase computer lab equipment service life.
In one embodiment, determining a dry-mode operating mode based on outdoor temperature includes:
if the outdoor temperature is less than or equal to a preset first temperature threshold value, controlling an outdoor air supply fan to start to work so as to enable outdoor air to enter a heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
the first temperature threshold may be 16 degrees, or may be other values, and is not particularly limited.
And starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, determining a wet condition operating mode based on outdoor temperature includes:
if the outdoor temperature is smaller than the preset second temperature threshold and larger than the preset first temperature threshold, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
the second temperature threshold is 17 degrees, and may be other values, and is not particularly limited.
Controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, determining the mechanical cooling mode based on the outdoor temperature includes:
if the outdoor air temperature is greater than or equal to a preset second temperature threshold value, controlling the outdoor air supply fan to start to work so as to enable the outdoor air to enter the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
Referring to fig. 2, a schematic of an indirect evaporative cooling system, the system comprising: the outdoor air can directly enter the heat exchanger or enter the heat exchanger after being sprayed with softened water; the outdoor air and the indoor air are discharged out of the heat exchanger after heat exchange is carried out on the heat exchanger, and specifically, a fan can be arranged at the outlet of the heat exchanger to discharge auxiliary air. The refrigerator and the evaporative cooling water belong to a mechanical refrigerating unit.
The following describes the flow of three mode switching in detail:
1) dry mode: if the outdoor temperature is less than or equal to a preset first temperature threshold value, controlling an outdoor air supply fan to start to work so as to enable outdoor air to enter a heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger; and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
2) Wet condition mode: if the outdoor temperature is smaller than the preset second temperature threshold and larger than the preset first temperature threshold, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger; controlling a spraying unit to spray the entering outdoor air; the sprayed outdoor air and the indoor air exchange heat in the heat exchanger; and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
3) Mechanical cold compensation mode: if the outdoor air temperature is greater than or equal to a preset second temperature threshold value, controlling the outdoor air supply fan to start to work so as to enable the outdoor air to enter the spraying unit; the sprayed outdoor air and the indoor air exchange heat in the heat exchanger; simultaneously starting a fan at an air outlet of the heat exchanger to send out air subjected to heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration. In a second aspect, the present application also provides an indirect evaporative cooling device applied to a central controller, including:
the receiving module is used for receiving the outdoor air temperature value detected by the temperature sensor;
the processing module is used for determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: dry operating mode, wet operating mode and mechanical cold-compensating mode.
In one embodiment, the processing module is further configured to control the outdoor air supply fan to start working if the outdoor temperature is less than or equal to a predetermined first temperature threshold value, so that outdoor air enters the heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, the processing module is further configured to, if the outdoor temperature is less than a predetermined second temperature threshold and greater than a predetermined first temperature threshold, control the outdoor air supply fan to start to operate, so that outdoor air enters the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
In one embodiment, the processing module is further configured to control the outdoor air supply fan to start working if the outdoor air temperature is greater than or equal to a predetermined second temperature threshold value, so that the outdoor air enters the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
In a third aspect, the present application also proposes an indirect evaporative cooling apparatus for use with a central controller, see fig. 3, the apparatus comprising: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor is configured to execute one or more program instructions to perform the method of any one of the above.
In a fourth aspect, the present application also proposes a computer-readable storage medium having one or more program instructions embodied therein for performing the above-mentioned steps.
In a fifth aspect, the present application also proposes an indirect evaporative cooling system, see fig. 4, comprising a central controller 31, an outdoor temperature sensor 32 and a heat exchanger 33 as described above;
the outdoor temperature sensor 32 is used for detecting outdoor temperature;
the central controller 31 is used for receiving the outdoor air temperature value detected by the temperature sensor;
determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: a dry operating mode, a wet operating mode and a mechanical cold-compensating mode;
and a heat exchanger 33 for heat-exchanging outdoor air and indoor air.
In one embodiment, the air conditioner further comprises an outdoor air supply fan 34, an indoor return air fan 35 and a heat exchanger 33 air outlet fan;
the central controller 31 is used for controlling the outdoor air supply fan 34 to start working if the outdoor temperature is less than or equal to a preset first temperature threshold value, so that outdoor air enters the heat exchanger 33; and controls the indoor return fan 35 to be activated to let the indoor air into the heat exchanger 33;
the air outlet fan of the heat exchanger 33 is started to send out the air after heat exchange.
In one embodiment, a spray unit 37 is also included;
if the outdoor temperature is less than the second preset temperature threshold and greater than the first preset temperature threshold, the outdoor air supply fan 34 is controlled to start to work, so that outdoor air enters the spraying unit 37; and controls the indoor return fan 35 to be activated to let the indoor air into the heat exchanger 33;
the spraying unit 37 is controlled to spray the entering outdoor air;
the sprayed outdoor air and indoor air are heat-exchanged in the heat exchanger 33;
the air outlet fan of the heat exchanger 33 is started to send out the air after heat exchange.
In one embodiment, a mechanical refrigeration unit 38;
the central controller 31 is configured to, if the outdoor air temperature is greater than a predetermined second temperature threshold, control the outdoor air supply fan 34 to start up so that the outdoor air enters the spraying unit 37;
the sprayed outdoor air and indoor air are heat-exchanged in the heat exchanger 33;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting an air outlet fan of the heat exchanger 33 to send out the air subjected to heat exchange; and activates the mechanical refrigeration unit 38 to assist in cooling.
The various methods, steps and logic blocks disclosed in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The processor reads the information in the storage medium and completes the steps of the method in combination with the hardware.
The storage medium may be a memory, for example, which may be volatile memory or nonvolatile memory, or which may include both volatile and nonvolatile memory.
The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory.
The volatile Memory may be a Random Access Memory (RAM) which serves as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), SLDRAM (SLDRAM), and Direct Rambus RAM (DRRAM).
The storage media described in connection with the embodiments of the invention are intended to comprise, without being limited to, these and any other suitable types of memory.
Those skilled in the art will appreciate that the functionality described in the present invention may be implemented in a combination of hardware and software in one or more of the examples described above. When software is applied, the corresponding functionality may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. An indirect evaporative cooling method, applied to a central controller, the method comprising:
receiving an outdoor air temperature value detected by a temperature sensor;
determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: dry operating mode, wet operating mode and mechanical cold-compensating mode.
2. The indirect evaporative cooling method of claim 1, wherein determining the dry-mode operation based on outdoor temperature comprises:
if the outdoor temperature is less than or equal to a preset first temperature threshold value, controlling an outdoor air supply fan to start to work so as to enable outdoor air to enter a heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
3. The indirect evaporative cooling method of claim 1, wherein determining the wet-mode operation based on outdoor temperature comprises:
if the outdoor temperature is smaller than the preset second temperature threshold and larger than the preset first temperature threshold, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
4. The indirect evaporative cooling method of claim 1, wherein determining the mechanical subcooling mode from the outdoor temperature comprises:
if the outdoor air temperature is greater than or equal to a preset second temperature threshold value, controlling the outdoor air supply fan to start to work so as to enable the outdoor air to enter the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
5. An indirect evaporative cooling apparatus, for use with a central controller, comprising: at least one processor and at least one memory; the memory is to store one or more program instructions; the processor, configured to execute one or more program instructions to perform the method of any of claims 1-4.
6. An indirect evaporative cooling system comprising the central controller of claim 5, an outdoor temperature sensor; a heat exchanger;
the outdoor temperature sensor is used for detecting outdoor temperature;
the central controller is used for receiving the outdoor air temperature value detected by the temperature sensor;
determining the working mode of the evaporative cooling system according to the outdoor air temperature;
the working modes comprise: a dry operating mode, a wet operating mode and a mechanical cold-compensating mode;
and the heat exchanger is used for exchanging heat between outdoor air and indoor air.
7. The indirect evaporative cooling system of claim 6, further comprising outdoor supply and indoor return air fans, heat exchanger outlet fans;
the central controller is used for controlling the outdoor air supply fan to start working if the outdoor temperature is less than or equal to a preset first temperature threshold value so as to enable outdoor air to enter the heat exchanger; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
8. The indirect evaporative cooling system of claim 6, further comprising a spray unit;
if the outdoor temperature is smaller than the preset second temperature threshold and larger than the preset first temperature threshold, controlling the outdoor air supply fan to start to work so as to enable outdoor air to enter the spraying unit; controlling the indoor return air fan to start so as to enable indoor air to enter the heat exchanger;
controlling a spraying unit to spray the entering outdoor air;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
and starting the air outlet fan of the heat exchanger to send out the air after heat exchange.
9. The indirect evaporative cooling system of claim 6, further comprising a mechanical refrigeration unit;
the central controller is used for controlling the outdoor air supply fan to start working if the temperature of the outdoor air is greater than or equal to a preset second temperature threshold value so as to enable the outdoor air to enter the spraying unit;
the sprayed outdoor air and the indoor air exchange heat in the heat exchanger;
if the temperature of the sprayed air is higher than the second temperature threshold value before the air enters the heat exchanger, starting a fan at an air outlet of the heat exchanger to send out the air after heat exchange; and starting the mechanical refrigerating unit for auxiliary refrigeration.
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| CN111140950A (en) * | 2019-12-23 | 2020-05-12 | 南京壹格软件技术有限公司 | Data center indirect evaporative cooling system and control method |
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Application publication date: 20210723 |