CN110779124A - Multi-stage refrigeration system for data center machine room - Google Patents

Multi-stage refrigeration system for data center machine room Download PDF

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Publication number
CN110779124A
CN110779124A CN201910932823.0A CN201910932823A CN110779124A CN 110779124 A CN110779124 A CN 110779124A CN 201910932823 A CN201910932823 A CN 201910932823A CN 110779124 A CN110779124 A CN 110779124A
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China
Prior art keywords
cooling chamber
air
cold
data center
water
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Pending
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CN201910932823.0A
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Chinese (zh)
Inventor
居静
王剑
吴四海
宋婧
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Hebei Qinhuai Data Co Ltd
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Hebei Qinhuai Data Co Ltd
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Priority to CN201910932823.0A priority Critical patent/CN110779124A/en
Publication of CN110779124A publication Critical patent/CN110779124A/en
Pending legal-status Critical Current

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-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
    • F24F5/0007Air-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
    • F24F5/0017Air-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 cold storage bodies, e.g. ice
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00Air-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
    • F24F5/0007Air-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
    • F24F5/0035Air-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
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20718Forced ventilation of a gaseous coolant
    • H05K7/20745Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14Thermal energy storage

Abstract

The invention discloses a multistage refrigerating system for a data center machine room, which comprises a first cooling chamber, a cold accumulation space and a second cooling chamber, wherein the first cooling chamber is provided with an air inlet and an air outlet, the air inlet of the first cooling chamber is used for receiving outdoor fresh air, and the first cooling chamber is configured to cool the outdoor fresh air and form first cold air; the cold accumulation space is provided with an air inlet and an air outlet, the air inlet of the cold accumulation space is connected with the air outlet of the first cooling chamber, and the cold accumulation space is configured to receive and store first cold air; the second cooling chamber is provided with an air inlet and an air outlet, and the air inlet of the second cooling chamber is connected with the air outlet of the cold accumulation space and used for receiving the first cold air output by the cold accumulation space; the second cooling chamber is configured to cool the first cold air and form second cold air, and an air outlet of the second cooling chamber is connected with an air inlet of the data center machine room and used for conveying the second cold air to the data center machine room.

Description

Multi-stage refrigeration system for data center machine room
Technical Field
The invention relates to the technical field of indoor air cooling, in particular to a multistage refrigerating system for a data center machine room.
Background
According to analysis, global data centers account for around 1.62% of world energy usage in 2014. By 2017, this figure has risen above 3% (about 420 terawatts), and the emissions from data centers will also account for around 2% of the total greenhouse gas emissions. As many as 500 billion internet of things devices will be used globally by 2020, while other statistics show that there are likely to be over 1000 billion internet of things devices in the next five years. Worldwide, data centers are the largest users of global energy usage scale, rising from 0.9% in 2015 to 4.5% in 2025. This research indicates that data centers will become one of the largest energy consumers worldwide, exceeding energy consumption levels in many countries.
The traditional cooling system of the data center machine room generally adopts a mechanical refrigeration mode, namely, a compressor is utilized to do work, various types of refrigerants are used as carriers, and a large amount of heat generated by the data center machine room is transported to the outside from the inside of the data center machine room, so that the machine room is cooled. However, the energy efficiency ratio of the traditional mechanical refrigeration system is too low, a large amount of energy is consumed, and for a large-scale data center machine room, the cost is high, the refrigeration effect is not good, and the traditional mechanical refrigeration system is not the most economical choice.
Based on indirect evaporative cooling principle, utilize the cold volume of outdoor cold air self promptly, in addition the water evaporative cooling principle, carry out the cold volume transmission with its hot-air with the indoor higher temperature of data center computer lab through non-direct contact heat exchanger to realize the process of the interior hotter air cooling of data center computer lab, promptly acquire cold volume from natural environment, utilize outdoor cold air to cool down the data center computer lab. The data center machine room built in this way has better refrigeration effect and is more energy-saving. However, the application of the indirect evaporative cooling system is limited by the climate conditions of the application area, and the natural cold air can be utilized in a short time and with a low energy efficiency ratio all the year around due to the fact that the cold time all the year around is too short and the average air temperature is high in part of the area; in addition, the indirect evaporative cooling system cannot meet the requirement of uninterrupted refrigeration because cold air cannot be stored due to the fact that air is directly subjected to heat exchange to convey cold air, and therefore the application scene of the indirect evaporative cooling system is very limited. In summary, how to construct a system can further prolong the time of utilizing natural cold air, improve the energy efficiency ratio of the data center machine room, expand the application area of the indirect evaporative cooling system, and provide cold storage, so as to meet the requirement of uninterrupted refrigeration of the data center machine room on the basis of the indirect evaporative cooling technology, which is a problem to be solved.
Disclosure of Invention
One object of the present invention is to provide a new solution for a multi-stage refrigeration system for a data center room.
According to one aspect of the present invention, there is provided a multi-stage refrigeration system for a data center machine room, the multi-stage refrigeration system comprising:
the first cooling chamber is provided with an air inlet and an air outlet, the air inlet of the first cooling chamber is used for receiving outdoor fresh air, and the first cooling chamber is configured to cool the outdoor fresh air and form first cold air;
the cold accumulation space is provided with an air inlet and an air outlet, the air inlet of the cold accumulation space is connected with the air outlet of the first cooling chamber, and the cold accumulation space is configured to receive and store first cold air;
the second cooling chamber is provided with an air inlet and an air outlet, and the air inlet of the second cooling chamber is connected with the air outlet of the cold accumulation space and used for receiving the first cold air output by the cold accumulation space; the second cooling chamber is configured to cool the first cold air and form second cold air, and an air outlet of the second cooling chamber is connected with an air inlet of the data center machine room and used for conveying the second cold air to the data center machine room.
Optionally, the first cooling chamber is provided with a spraying device, or the first cooling chamber is provided with a spraying device and an air handling unit.
Optionally, the first cooling chamber is provided with a water pan configured for recovering water sprayed by the spraying device.
Optionally, the second cooling chamber is provided with a spraying device, or the second cooling chamber is provided with a spraying device and an air handling unit.
Optionally, the second cooling chamber is provided with a water pan configured for recovering water sprayed by the spraying device.
Optionally, the multistage refrigeration system further includes a pre-cooling chamber, the pre-cooling chamber has an air inlet and an air outlet, the air inlet of the pre-cooling chamber is used for receiving outdoor fresh air, the pre-cooling chamber is configured to pre-cool the outdoor fresh air, and the air outlet of the pre-cooling chamber is connected to the air inlet of the first cooling chamber and is used for delivering the pre-cooled outdoor fresh air to the first cooling chamber.
Optionally, a cold coil and a cold water pipe communicated with the cold coil are arranged in the pre-cooling chamber, the cold water pipe is used for conveying water to the cold coil, and the cold coil is configured to cool the water in the cold coil and pre-cool outdoor fresh air entering the pre-cooling chamber by using the cooling water.
Optionally, the second cooling chamber is provided with a spraying device and a water pan, and the water pan is configured to be used for recovering water sprayed by the spraying device; and the water pan of the second cooling chamber is communicated with the cold water pipe.
Optionally, the first cooling chamber is provided with a spraying device and an air handling unit, and the first cooling chamber is further provided with a fan which is located at the top of the air handling unit.
Optionally, the second cooling chamber is provided with a spraying device and an air handling unit, and the second cooling chamber is further provided with a fan which is located at the top of the air handling unit.
Optionally, the cold storage space is a heat insulation space disposed below the ground surface.
The multistage refrigeration system for the data center machine room meets the uninterrupted refrigeration requirement of the multistage refrigeration system by arranging the cold accumulation space; through setting up multistage cooling chamber, refrigeration effect is better.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a multi-stage refrigeration system for a data center room according to the present invention;
figure 2 is a psychrometric chart of a multi-stage refrigeration system for a data center room of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
The embodiment of the invention provides a multistage refrigeration system for a data center machine room, and referring to fig. 1, the multistage refrigeration system comprises a first cooling chamber 1, a cold accumulation space 2 and a second cooling chamber 3, wherein the first cooling chamber 1 is provided with an air inlet and an air outlet, the air inlet of the first cooling chamber 1 is used for receiving outdoor fresh air, and the first cooling chamber 1 is configured to cool the outdoor fresh air and form first cold air; the cold accumulation space 2 is provided with an air inlet and an air outlet, the air inlet of the cold accumulation space 2 is connected with the air outlet of the first cooling chamber 1, and the cold accumulation space 2 is configured to receive and store first cold air; the second cooling chamber 3 is provided with an air inlet and an air outlet, and the air inlet of the second cooling chamber 3 is connected with the air outlet of the cold accumulation space 2 and used for receiving the first cold air output by the cold accumulation space 2; the second cooling chamber 3 is configured to cool the first cold air and form second cold air, and an air outlet of the second cooling chamber 3 is connected with an air inlet of the data center machine room and used for conveying the second cold air to the data center machine room.
Outdoor new trend enters into first cooling chamber 1 from the air intake of first cooling chamber 1, first cooling chamber 1 cools down outdoor new trend and forms first cold wind, then first cold wind flows into cold-storage space 2 from the air outlet of first cooling chamber 1 in, cold-storage space 2 stores first cold wind, when the temperature in cold-storage space 2 reaches predetermined temperature threshold, cold-storage space 2 carries first cold wind to the air intake of second cooling chamber 3 from its air outlet, after first cold wind enters into second cooling chamber 3, second cooling chamber 3 cools down first cold wind and forms second cold wind, finally, second cold wind flows into the data center computer lab from the air outlet of second cooling chamber 3, be used for cooling down the hot air in the data center computer lab.
In the embodiment of the present invention, since the cold storage space 2 is provided, the cold storage space 2 can store cold air (for example, the first cool air described above), and the cold storage space 2 is a sufficiently large heat insulation space provided below the ground surface, and can be preferably implemented by using an existing pit, such as a pit, without newly building a space. When the natural temperature outside the data center machine room is high and sufficient natural cold air cannot be provided, the cold air (for example, the first cold air) stored in the cold storage space 2 can make up for the deficiency of the natural cold air, so that the uninterrupted refrigeration requirement of the multistage refrigeration system is met, and a state point with relatively low temperature is provided for the second cooling chamber 3. In addition, in the multistage refrigerating system, the second cold air which is cooled twice by the first cooling chamber 1 and the second cooling chamber 3 is provided for the data center machine room, so that the average temperature of the cold air which finally enters the data center machine room can be obviously reduced compared with the average temperature of the cold air which only passes through one cooling chamber, and the refrigerating effect is better.
In one embodiment, the first cooling chamber 1 is provided with a spray device, or the first cooling chamber 1 is provided with a spray device and an air handling unit. Referring to fig. 1, the first spraying device 11 may be separately provided in the first cooling chamber 1, or both the first spraying device 11 and the first air handling unit 12 may be provided in the first cooling chamber 1. When the first spraying equipment 11 is independently arranged in the first cooling chamber 1, the first spraying equipment 11 independently sprays and cools the outdoor fresh air received by the first cooling chamber 1, and the sprayed and cooled outdoor fresh air is mixed with air in the first cooling chamber 1 to form first cold air; when the first spraying equipment 11 and the first air handling unit 12 are arranged in the first cooling chamber 1 at the same time, outdoor fresh air enters the first cooling chamber 1 and then is firstly sprayed and cooled by the first spraying equipment 11, and then is subjected to indirect evaporative cooling in the first air handling unit 12 to form first cold air; the indirect evaporative cooling refers to a process of transferring cold energy of wet air obtained by direct evaporative cooling to air to be treated through a non-direct contact heat exchanger so as to realize equal-humidity cooling of the air, specifically, the process refers to the embodiment that outdoor fresh air firstly receives spraying cooling after entering the first cooling chamber 1, the outdoor fresh air after spraying cooling is subjected to cold energy transfer with the air in the first cooling chamber 1 through a heat exchange core of the first air treatment unit 12, and first cold air is formed after the air in the first cooling chamber 1 is cooled. In practical application, the first spraying device 11 and the first air handling unit 12 can be arranged in the first cooling chamber 1 at the same time, and if only the first spraying device 11 needs to be used alone, only the first spraying device 11 is started; if it is desired to use the first spraying device 11 and the first air-handling unit 12, both are switched on.
In one embodiment, referring to fig. 1, a first water pan 13 is disposed at the bottom inside the first cooling chamber 1, and the first water pan 13 is used for recovering water falling after being sprayed by the first spraying device 11, so that the water can be conveniently treated in the next step after being recovered.
In one embodiment, the second cooling chamber 3 is provided with a spraying device, or the second cooling chamber 3 is provided with a spraying device and an air handling unit. Referring to fig. 1, a second spraying device 31 may be separately provided in the second cooling chamber 3, or both the second spraying device 31 and the second air handling unit 32 may be provided in the second cooling chamber 3. When the second spraying equipment 31 is independently arranged in the second cooling chamber 3, the second spraying equipment 31 independently sprays and cools the first cold air received by the second cooling chamber 3, and the first cold air after spraying and cooling is mixed with air in the second cooling chamber 3 to form second cold air; when the second spraying equipment 31 and the second air handling unit 32 are arranged in the second cooling chamber 3 at the same time, the first cold air firstly receives the spraying cooling of the second spraying equipment 31 after entering the second cooling chamber 3, and then is directly evaporated and cooled in the second air handling unit 32 to form second cold air; namely, the first cold air firstly receives spraying cooling after entering the second cooling chamber 3, and the first cold air after spraying cooling carries out cold quantity transmission with the air in the second cooling chamber 3 through the heat exchange core body of the second air processing unit 32, so that the air in the second cooling chamber 3 forms the second cold air after cooling.
In practical application, a second spraying device 31 and a second air handling unit 32 can be arranged in the second cooling chamber 3 at the same time, and if only the second spraying device 31 needs to be used independently, only the second spraying device 31 is started; if it is desired to use the second spraying device 31 and the second air handling unit 32, both are switched on.
In one embodiment, referring to fig. 1, a second water receiving tray 33 is disposed at the bottom inside the second cooling chamber 3, and the second water receiving tray 33 is used for recovering water falling after being sprayed by the second spraying device 31, so that the water can be conveniently treated in the next step after being recovered.
In one embodiment, referring to fig. 1, the multistage refrigeration system further includes a pre-cooling chamber 4, where the pre-cooling chamber 4 has an air inlet and an air outlet, the air inlet of the pre-cooling chamber 4 is used for receiving fresh outdoor air, the pre-cooling chamber 4 is configured to pre-cool the fresh outdoor air, and the air outlet of the pre-cooling chamber 4 is connected to the air inlet of the first cooling chamber 1, and is used for delivering the pre-cooled fresh outdoor air to the first cooling chamber 1. In this embodiment, the outdoor fresh air is first precooled and cooled by the precooling chamber 4 and then enters the first cooling chamber 1, so that the refrigeration effect of the whole system can be further improved.
In one embodiment, a cold coil 41 and a cold water pipe communicated with the cold coil are disposed in the pre-cooling chamber 4, the cold water pipe is used for conveying water to the cold coil 41, and the cold coil 41 is configured to cool the water therein and pre-cool outdoor fresh air entering the pre-cooling chamber 4 with the cooling water. In practical application, a pre-cooling chamber 4 is arranged at the front section of the first cooling chamber 1, and a cold coil 41 arranged in the pre-cooling chamber 4 is started if outdoor fresh air needs to be pre-cooled; and if the outdoor fresh air does not need to be pre-cooled, the cooling coil 41 arranged in the pre-cooling chamber 4 is closed.
In one embodiment, referring to fig. 1, the multi-stage refrigeration system further includes a water supply pipe 5, wherein the water supply pipe 5 is connected to the first spraying device 11 and the second spraying device 31, and is used for supplying spraying water to the first spraying device 11 and the second spraying device 31; the multi-stage refrigeration system further comprises a water drainage pipe 6, wherein the water drainage pipe 6 is connected with the first water pan 13 and the second water pan 33 and used for draining water in the first water pan 13 and the second water pan 33.
In another embodiment, the second water pan 33 is communicated with a cold water pipe arranged in the pre-cooling chamber 4, and water in the second water pan 33 is pumped by a water pump and sent into the cold water pipe to enter the cold coil pipe 41 for pre-cooling fresh air outdoors. Therefore, the reuse of the spray water can be realized, and the energy is effectively saved. Of course, the water in the first water receiving tray 13 and/or the second water receiving tray 33 can also be communicated to the water supply pipe 5, so that the cyclic utilization of the spray water is realized, and the energy can be saved.
In another embodiment, a detection module and a control module are arranged on a pipeline communicated with the second water pan 33, the detection module is responsible for detecting the water quality of the water in the second water pan 33, and when the water quality is qualified, the control module controls the water in the second water pan 33 to flow into the cold water pipe and then enter the cold coil pipe 41 to pre-cool the outdoor fresh air; when the water quality is unqualified, the control module controls the water in the second water receiving tray 33 to be discharged from the water discharge pipe 6.
In one embodiment, when the first cooling chamber 1 is provided with the first air handling unit 12, the first cooling chamber 1 is further provided with a fan 14, and the fan 14 is located on the top of the first air handling unit 12 and is used for extracting hot air after indirect evaporative cooling of the first air handling unit 12.
In one embodiment, when the second cooling chamber 3 is provided with the second air handling unit 32, the second cooling chamber 3 is further provided with a fan 34, and the fan 34 is positioned on the top of the second air handling unit 32 and is used for extracting hot air after indirect evaporative cooling of the second air handling unit 32.
In a particular example, the cold coil 41 of the pre-cooling chamber 4 is opened; the first spraying equipment 11 and the first air handling unit 12 of the first cooling chamber 1 are simultaneously started; and the second spraying device 31 and the second air handling unit 32 of the second cooling chamber 3 are also simultaneously turned on:
referring to the psychrometric chart shown in fig. 2, the vertical axis represents the wet bulb temperature t, the horizontal axis represents the relative humidity, the curve represents the equal relative humidity line, W0 represents the outdoor fresh air, W1 represents the outdoor fresh air after pre-cooling, W2 represents the first cool air, and W3 represents the second cool air.
In the prior art, only a single primary indirect evaporative cooling is performed, the outdoor fresh air W0 is subjected to primary indirect evaporative cooling to form cold fresh air W1 'to refrigerate a data center machine room, and the temperature of the cold fresh air W1' is between W1 and W2 but not reaches the temperature of W3.
In order to achieve a better refrigeration effect and enable the temperature which finally flows into a data center machine room to be lower and more stable, the outdoor fresh air W0 is subjected to equal-humidity cooling through the pre-cooling chamber 4, the absolute moisture content in the fresh air is unchanged through the process, but the temperature is reduced to be in a W1 state, and the pre-cooled outdoor fresh air is formed; the precooled outdoor fresh air is subjected to an equal-humidity cooling process of first indirect evaporative cooling through the first cooling chamber 1, and the precooled outdoor fresh air W1 is cooled to first cold air W2; the first cold air W2 is stored in the cold storage space 2 in a closed manner, then the first cold air W2 is subjected to an isenthalpic cooling process of direct evaporative cooling through the second cooling chamber 3, the first cold air W2 is cooled to the second cold air W3, and finally the data center machine room is refrigerated by utilizing the second cold air W3. The temperature of the state point of the second cold air W3 is between the wet bulb temperature (W2) and the dew point temperature of the state point W0, and the W3 temperature is usually 2-5 ℃ lower than the wet bulb temperature (W2) of the state point W0 according to different meteorological conditions in different areas.
After the constant-humidity cooling through one-time indirect evaporative cooling, the temperature of the new state point is generally more than 2-5 ℃ of the wet bulb temperature of the initial state point.
Compared with single indirect evaporative cooling equipment in the prior art, the multi-stage refrigeration system has the advantages that the temperature of the final state point is lowered by 4-10 ℃, and the change of the state point can enable the available natural cooling temperature point of the system to be raised by 4-10 ℃. The natural cooling temperature point of an original certain area is assumed to be the wet bulb temperature of 16 ℃, and after the system is applied, the natural cooling temperature point is increased to 20-26 ℃, so that the annual natural cooling time is greatly prolonged, the energy consumption of the system is reduced, and the annual energy efficiency ratio of the refrigeration system is improved. Taking the Beijing area as an example, if the natural cooling temperature point is increased by 7 ℃, 1800 hours of natural cooling time can be increased every year, and huge energy-saving benefit can be generated.
In addition, in the system of the invention, a huge closed heat insulation space, namely the cold accumulation space 2 is separately arranged, and the space stores a large amount of cold air at the W2 state point, so that the space can be used as the cold accumulation space of the data center machine room and meets the uninterrupted cold supply requirement of the data center machine room.
In a preferred embodiment, water in the second water pan 33 of the second cooling chamber 3 is introduced into the cold coil 41 through the water pump and the cold water pipe to pre-cool fresh air outdoors, so that the second cooling chamber 3 can not only cool the data center machine room through heat exchange by the heat exchange core of the second air handling unit 32, but also output cold water at a W2 state point, the cold water is introduced into the cold coil 41 of the pre-cooling chamber 4 through the water pump and the cold water pipe to cool the fresh air outdoors for pre-cooling, and the cold water can be mixed with water after passing through the cold coil 41 and used as spraying water for the first cooling chamber 1 and the second cooling chamber 3, thereby realizing recycling of the cooling water.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (11)

1. A multi-stage refrigeration system for a data center room, the multi-stage refrigeration system comprising:
the first cooling chamber is provided with an air inlet and an air outlet, the air inlet of the first cooling chamber is used for receiving outdoor fresh air, and the first cooling chamber is configured to cool the outdoor fresh air and form first cold air;
the cold accumulation space is provided with an air inlet and an air outlet, the air inlet of the cold accumulation space is connected with the air outlet of the first cooling chamber, and the cold accumulation space is configured to receive and store first cold air;
the second cooling chamber is provided with an air inlet and an air outlet, and the air inlet of the second cooling chamber is connected with the air outlet of the cold accumulation space and used for receiving the first cold air output by the cold accumulation space; the second cooling chamber is configured to cool the first cold air and form second cold air, and an air outlet of the second cooling chamber is connected with an air inlet of the data center machine room and used for conveying the second cold air to the data center machine room.
2. The multi-stage refrigeration system for the data center machine room according to claim 1, wherein the first cooling chamber is provided with a spraying device, or the first cooling chamber is provided with a spraying device and an air handling unit.
3. The multi-stage refrigeration system for a data center room of claim 2, wherein the first cooling chamber is provided with a water pan configured to recover water sprayed by a spray device.
4. The multi-stage refrigeration system for the data center machine room according to claim 1, wherein the second cooling chamber is provided with a spraying device, or the second cooling chamber is provided with a spraying device and an air handling unit.
5. The multi-stage refrigeration system for a data center room of claim 4, wherein the second cooling chamber is provided with a water pan configured to recover water sprayed by a spray device.
6. The multi-stage refrigeration system for the data center machine room according to claim 1, further comprising a pre-cooling chamber, wherein the pre-cooling chamber has an air inlet and an air outlet, the air inlet of the pre-cooling chamber is used for receiving fresh outdoor air, the pre-cooling chamber is configured to pre-cool the fresh outdoor air, and the air outlet of the pre-cooling chamber is connected to the air inlet of the first cooling chamber and is used for delivering the pre-cooled fresh outdoor air to the first cooling chamber.
7. The multi-stage refrigeration system for the data center machine room of claim 6, wherein a cold coil and a cold water pipe communicated with the cold coil are arranged in the pre-cooling chamber, the cold water pipe is used for conveying water to the cold coil, and the cold coil is configured to cool the water in the cold coil and pre-cool outdoor fresh air entering the pre-cooling chamber by using the cooling water.
8. The multi-stage refrigeration system for the data center machine room according to claim 7, wherein the second cooling chamber is provided with a spraying device and a water receiving tray, and the water receiving tray is configured to recover water sprayed by the spraying device; and the water pan of the second cooling chamber is communicated with the cold water pipe.
9. The multi-stage refrigeration system for the data center machine room as claimed in claim 1, wherein the first cooling chamber is provided with a spraying device and an air handling unit, and the first cooling chamber is further provided with a fan which is positioned at the top of the air handling unit.
10. The multi-stage refrigeration system for the data center machine room as claimed in claim 1, wherein the second cooling chamber is provided with a spraying device and an air handling unit, and the second cooling chamber is further provided with a fan which is positioned at the top of the air handling unit.
11. The multi-stage refrigeration system for a data center machine room according to any one of claims 1 to 10, wherein the cold storage space is an insulated space disposed below a ground surface.
CN201910932823.0A 2019-09-29 2019-09-29 Multi-stage refrigeration system for data center machine room Pending CN110779124A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202485130U (en) * 2012-02-08 2012-10-10 西安工程大学 Compact type three-level evaporative cooling air conditioning unit
CN202546965U (en) * 2012-03-19 2012-11-21 西安工程大学 Water chilling unit capable of using vertical-type dew-point indirect three-stage evaporative cooling
CN104019510A (en) * 2014-06-09 2014-09-03 西安工程大学 Water-air radiant panel evaporative cooling air conditioning system provided with cold beam and used for data center
CN204593668U (en) * 2015-01-05 2015-08-26 西安工程大学 Be applicable to the air-conditioning system in Environmental Control System of Metro with ventilation function
CN105042740A (en) * 2015-07-06 2015-11-11 西安工程大学 Self-adaptation energy-saving air-conditioner system with combination of rock bed and evaporative cooling
CN108848653A (en) * 2018-06-28 2018-11-20 西安工程大学 The natural cooling air-conditioning system of the Arid Area data center closing passage of heat

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202485130U (en) * 2012-02-08 2012-10-10 西安工程大学 Compact type three-level evaporative cooling air conditioning unit
CN202546965U (en) * 2012-03-19 2012-11-21 西安工程大学 Water chilling unit capable of using vertical-type dew-point indirect three-stage evaporative cooling
CN104019510A (en) * 2014-06-09 2014-09-03 西安工程大学 Water-air radiant panel evaporative cooling air conditioning system provided with cold beam and used for data center
CN204593668U (en) * 2015-01-05 2015-08-26 西安工程大学 Be applicable to the air-conditioning system in Environmental Control System of Metro with ventilation function
CN105042740A (en) * 2015-07-06 2015-11-11 西安工程大学 Self-adaptation energy-saving air-conditioner system with combination of rock bed and evaporative cooling
CN108848653A (en) * 2018-06-28 2018-11-20 西安工程大学 The natural cooling air-conditioning system of the Arid Area data center closing passage of heat

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Application publication date: 20200211