CN111609580A - Cabinet cooling system and method using carbon dioxide as working medium - Google Patents

Cabinet cooling system and method using carbon dioxide as working medium Download PDF

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Publication number
CN111609580A
CN111609580A CN202010551498.6A CN202010551498A CN111609580A CN 111609580 A CN111609580 A CN 111609580A CN 202010551498 A CN202010551498 A CN 202010551498A CN 111609580 A CN111609580 A CN 111609580A
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China
Prior art keywords
cabinet
working medium
heat exchange
carbon dioxide
return line
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CN202010551498.6A
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Chinese (zh)
Inventor
钟声远
王小元
赵军
李文甲
李�浩
李扬
许文杰
朱介北
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Tianjin University
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Tianjin University
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Priority to CN202010551498.6A priority Critical patent/CN111609580A/en
Publication of CN111609580A publication Critical patent/CN111609580A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C3/00Fire prevention, containment or extinguishing specially adapted for particular objects or places
    • A62C3/16Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
    • AHUMAN NECESSITIES
    • A62LIFE-SAVING; FIRE-FIGHTING
    • A62CFIRE-FIGHTING
    • A62C31/00Delivery of fire-extinguishing material
    • A62C31/02Nozzles specially adapted for fire-extinguishing
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Public Health (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)

Abstract

The invention relates to a cabinet cooling system and a method using carbon dioxide as a working medium, which are characterized in that: comprising CO2Refrigerating unit, CO2Supply line, cabinet, CO2Return line and CO2A storage tank, the cabinet comprises a cabinet body and CO arranged on the cabinet body2Import, CO2Outlet, CO2Heat exchange line and fan, the CO2CO passing through refrigerating unit2CO with supply line connected to the cabinet2Inlet, the CO2The inlet is connected to the CO2At one end of the heat exchange line, the CO2The other end of the heat exchange pipeline is connected to the CO2Outlet, CO of the cabinet body2Outlet through CO2A return line is connected to the CO2Storage tank of said CO2Storage tank passing CO2A return line is connected to the CO2A refrigeration unit. The cabinet cooling device has scientific and reasonable structural design, has the function of refrigeration and fire extinguishing, can realize high-efficiency and safe cooling of the cabinet, and ensures the use safety performance of the cabinet.

Description

Cabinet cooling system and method using carbon dioxide as working medium
Technical Field
The invention belongs to the technical field of refrigeration and cooling, relates to cabinet cooling, and particularly relates to a cabinet cooling system and method using carbon dioxide as a working medium.
Background
With the implementation of national big data strategy and internet + strategy, the national informatization level is continuously improved, and the new application of new services such as image recognition, big data display and the like brings about rapid increase of data services. The development of data centers as necessary infrastructure toward large-scale, high-density data centers has brought about two problems:
one is that as the performance of computers and servers increases, the devices become more and more powerful, resulting in more heat being generated by the computers and communication devices during operation. If the heat dissipation of the device is poor, the system may not operate stably, and even the system may be crashed. The machine room belongs to a dynamic intensive heat source, and the large-scale high-density arrangement can further increase the heat dissipation pressure, so that a refrigeration system is required to timely and effectively dissipate the generated heat, the refrigeration is efficient as much as possible, and the energy consumption is reduced.
Secondly, due to the dense arrangement of the cabinets, the fire prevention work of the cabinets is particularly important, once a fire disaster occurs, not only can hardware be damaged, but also the paralysis of the system and the loss of data and other serious consequences can be caused, so that the machine room also needs an efficient fire extinguishing mode with small loss.
The traditional data machine room cooling usually adopts machine room-level cooling, and some researchers adopt a heat pipe heat exchanger unit to keep the temperature, humidity and cleanliness of the whole machine room constant. The cooling form needs to consume a large amount of energy, so that the overall cooling efficiency of the machine room is low, and a local heat island phenomenon is easy to occur, thereby causing accidents.
In contrast, some researchers change the air supply mode of the air conditioner in the machine room, but the problem is not solved fundamentally. At present, a plurality of data machine rooms are used for directly cooling the cabinet, a cabinet type data center is used in a patent, or a plurality of refrigerating units are arranged at a terminal for respectively refrigerating so as to realize the regulation of refrigerating capacity, the refrigerating efficiency is improved, the safety of the operation of the data center is improved, and the refrigerating energy consumption is effectively reduced. However, in the above cabinet-level refrigeration form, the refrigerants used are usually R134a, R22, R410a or R407c, and many of these refrigerants have toxicity, which can cause casualties and damage to the ozone layer once leakage occurs, thus aggravating the greenhouse effect. And in addition, some cabinet-level cooling uses water as a circulating working medium, and once the water is leaked, a machine room is short-circuited, so that huge damage is caused.
In addition, the fire extinguishing mode of the data computer room is also very important, and along with the development of the data center towards the direction of high density and high operation speed, the arrangement of the machine cabinets is more and more intensive, so that the fire extinguishing work is difficult.
Firstly, the electronic equipment has high requirements on the fire extinguishing agent. If water is used as the fire extinguishing agent, the electronic equipment is short-circuited and damaged. Ammonium phosphate dry powder fire extinguishers, sodium bicarbonate dry powder fire extinguishers or carbon dioxide fire extinguishers are usually selected to extinguish fire in a data room, and residual powdered covering materials after the dry powder extinguishers extinguish fire have certain corrosion effect and dust pollution on electronic components and are difficult to clean. If a gas fire extinguishing system is adopted to extinguish fire in a data machine room, the fire extinguishing agent mainly used by the gas fire extinguishing system is difluoro-chloro-bromomethane, trifluorobromomethane or 1, 2-dibromotetrafluoroethane, the substances are insulating gas at normal temperature, when the substances are exposed to flame and heated at high temperature, the fire extinguishing agent can generate cracking reaction to generate free radicals with high reaction activity, and the free radicals can interrupt combustion chain reaction to achieve the purpose of extinguishing fire. However, these compounds are severely damaging to the ozone layer and are gradually being banned.
And secondly, the arrangement of the processors in the data center is dense, so that the spatial limitation is brought to the arrangement of fire extinguishing equipment and the action of fire extinguishing personnel. If the fire extinguisher is used for extinguishing fire by manual operation of personnel, because the fire extinguishing personnel cannot approach the fire ignition point due to the dense arrangement of the cabinets, even the dense arrangement of the cabinets can bring threat to the life safety of the fire extinguishing personnel. If a water mist fire extinguishing system or a gas fire extinguishing system is adopted, equipment such as a fire extinguishing device, a fire extinguishing agent pipeline and the like needs to be additionally arranged in the data center, a large amount of space is occupied, and the overall cost is very high.
Thirdly, the processor arranged in the data center is high in price, and once a fire breaks out, the fire is required to be quickly extinguished aiming at the fire breaking point, so that the fire is quickly and accurately extinguished, and the loss is reduced to the minimum. If the fire is artificially extinguished, the time from the discovery of the fire condition to the start of extinguishing the fire can be dozens of minutes, the loss is increased, and the artificial fire extinguishment is difficult to find and the fire is accurately extinguished aiming at the fire-starting point. If the water mist is adopted for fire extinguishing, the diffusion speed of the water mist in the air is low, the water mist is difficult to enter the cabinet, so that the protection performance of the internal equipment is poor, and the targeted fire extinguishing of a single cabinet cannot be realized. Adopt heptafluoropropane, pentafluoroethane or mist can in time put out a fire effectively, but need additionally lay equipment such as fire extinguishing agent pipeline, need seal whole space can't realize that single rack realizes the pertinence and puts out a fire during the use.
Disclosure of Invention
The invention aims to provide a cabinet cooling system and method using carbon dioxide as a working medium, aiming at the defects and shortcomings of the prior art, and the system and method have the refrigeration and fire-extinguishing functions and can realize efficient and safe cooling of a cabinet.
The technical problem to be solved by the invention is realized by the following technical scheme:
machine using carbon dioxide as working mediumCabinet cooling system, its characterized in that: comprising CO2Refrigerating unit, CO2Supply line, cabinet, CO2Return line and CO2A storage tank, the cabinet comprises a cabinet body and CO arranged on the cabinet body2Import, CO2Outlet, CO2Heat exchange line and fan, the CO2CO passing through refrigerating unit2CO with supply line connected to the cabinet2Inlet, the CO2The inlet is connected to the CO2At one end of the heat exchange line, the CO2The other end of the heat exchange pipeline is connected to the CO2Outlet, CO of the cabinet body2Outlet through CO2A return line is connected to the CO2Storage tank of said CO2Storage tank passing CO2A return line is connected to the CO2A refrigeration unit.
And, the CO2A valve is arranged on the storage tank.
Moreover, a cabinet body of the cabinet is provided with CO2Nozzle of said CO2A nozzle connected to the CO2A supply line.
Moreover, the air volume of the fan can be adjusted, and the CO is2The opening and closing of the nozzle can be adjusted.
A cabinet cooling method using carbon dioxide as a working medium is characterized in that: the method comprises the following steps:
S1、CO2supplying: CO22CO regulation for refrigerating unit2The pressure of the supply pipeline is 8-12 MPa, the temperature is 2-7 ℃, so that the supercritical CO is obtained2And subjecting the supercritical CO2By CO2The supply pipe is input into the cabinet;
s2, cooling and heat exchange: CO22Supercritical CO in the supply line2By CO2CO entering the cabinet at the inlet2The heat exchange pipeline is opened, the fan is opened, and the air in the cabinet flows through the CO2The outside of the heat exchange pipeline is cooled, heat generated in the cabinet is taken away, and the refrigerating capacity of the system is changed by adjusting the air quantity of the fan;
S3、CO2refluxing: after heat exchange with air and temperature riseCO2By CO2Outlet into CO2Return line with CO2Store tank to CO2Return line filled with CO2Ensuring CO2CO in return line2The pressure is 8-12 MPa, and CO2CO in the return line2Finally enter CO2A refrigeration unit; at the same time, CO2The refrigerating unit can flexibly adjust CO according to the requirement2The flow rate of the working medium is changed, and the cooling capacity of the working medium is changed.
The invention has the advantages and beneficial effects that:
1. the cabinet cooling system takes the carbon dioxide as the working medium, the carbon dioxide naturally exists in the nature, the ozone damage potential and the global warming potential are almost zero, the refrigerating capacity per unit volume is large, and the volume required by the refrigerating part can be reduced by arranging the carbon dioxide in the cabinet.
2. Compared with a data center additionally provided with a fire extinguishing pipeline, the cabinet cooling system using carbon dioxide as a working medium adopts carbon dioxide as a refrigerating working medium and is used for extinguishing fire at the same time, and a fire extinguishing agent pipeline does not need to be additionally laid, so that the fire fighting investment can be saved, the occupied volumes of the cabinet and the fire extinguishing agent pipeline can be reduced, the occupied space of the cabinet is reduced, and a more encrypted and efficient machine room can be favorably constructed. The cabinet refrigeration and the fire extinguishing are combined, so that the danger and low efficiency of manually operating the fire extinguisher are avoided, the high investment of gas fire extinguishing is avoided, and the high-efficiency operation and the investment reduction are realized.
3. According to the cabinet cooling method using carbon dioxide as the working medium, the carbon dioxide in the refrigeration pipeline is adopted for extinguishing fire, when a fire disaster occurs, people do not need to enter a fire scene, the life safety of fire extinguishing personnel is guaranteed, the carbon dioxide pipeline releases the carbon dioxide in the cabinet for extinguishing the fire, the fire can be directly extinguished at a fire point, and the accurate fire extinguishing of a single cabinet can be realized.
4. The cabinet cooling device is scientific and reasonable in design, has a refrigeration and fire-extinguishing function, can realize efficient and safe cooling of the cabinet, and ensures the use safety of the cabinet.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of the cabinet of the present invention;
FIG. 3 is a left side view of the cabinet of the present invention;
FIG. 4 is a right side view of the cabinet of the present invention;
fig. 5 is a sectional view taken along line a-a of fig. 4.
Description of the reference numerals
1-CO2Refrigerating unit, 2-CO2Supply line, 3-cabinet, 4-CO2Return line, 5-valve, 6-CO2Storage tank, 7-CO2Import, 8-CO2Outlet, 9-cabinet, 10-CO2Working medium heat exchange pipeline, 11-fan and 12-CO2And (4) a nozzle.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
A cabinet cooling system using carbon dioxide as a working medium is innovative in that: comprising CO2Refrigerating unit 1, CO2Supply line 2, cabinet 3, CO2Return line 4 and CO2A storage tank 6, a cabinet comprising a cabinet body 9 and CO arranged on the cabinet body2Inlet 7, CO2Outlet 8, CO2 Heat exchange line 10 and fan 11, CO2CO passing through refrigerating unit2CO with supply line connected to cabinet2Import, CO2The inlet is connected to CO2One end of the heat exchange line, CO2The other end of the heat exchange pipeline is connected to CO2CO of the outlet, cabinet2Outlet through CO2The return line is connected to CO2Storage tank, CO2Storage tank passing CO2The return line is connected to CO2In the refrigerating unit, carbon dioxide naturally exists in the nature, the ozone destruction potential value and the global warming potential value are almost zero, the refrigerating capacity per unit volume is large, and the volume required by the refrigerating part can be reduced by arranging the refrigerating unit in the cabinet.
CO2A valve 5 is arranged on the storage tank, and CO can be controlled in real time through the valve2Store tank to CO2Make-up in return lineCO2The supply amount of the refrigerant is ensured.
CO is arranged on the cabinet body of the cabinet2Nozzle 12, CO2Nozzle connected to CO2The supply line can spray CO2 to the rack inside when the rack is on fire, plays the effect of cooling and isolated oxygen.
The air volume of the fan can be adjusted, and CO is2The opening and closing of the nozzle can be adjusted, the refrigerating capacity of the control system can be adjusted in real time, efficient refrigeration of the cabinet is guaranteed, and the operation safety performance of the cabinet is guaranteed.
A cabinet cooling method using carbon dioxide as a working medium is characterized in that: the method comprises the following steps:
S1、CO2supplying: CO22CO regulation for refrigerating unit2The pressure of the supply pipeline is 8-12 MPa, the temperature is 2-7 ℃, so that the supercritical CO is obtained2And subjecting the supercritical CO2By CO2The supply pipe is input into the cabinet;
s2, cooling and heat exchange: CO22Supercritical CO in the supply line2By CO2CO entering the cabinet at the inlet2The heat exchange pipeline is opened, the fan is opened, and the air in the cabinet flows through the CO2The outside of the heat exchange pipeline is cooled, heat generated in the cabinet is taken away, and the refrigerating capacity of the system is changed by adjusting the air quantity of the fan;
S3、CO2refluxing: CO after heat exchange and temperature rise with air2By CO2Outlet into CO2Return line with CO2Store tank to CO2Return line filled with CO2Ensuring CO2CO in return line2The pressure is 8-12 MPa, and CO2CO in the return line2Finally enter CO2A refrigeration unit; at the same time, CO2The refrigerating unit can flexibly adjust CO according to the requirement2The flow rate of the working medium is changed, and the cooling capacity of the working medium is changed.
The working principle of the invention is as follows:
CO2the refrigeration unit remains open to CO2CO of supply line2The pressure of the working medium is within the range of 8-12 MPa, and the temperature is 2The temperature is within 7 ℃ to ensure that the catalyst is in a supercritical state;
CO2supercritical CO in the supply line2By CO2CO entering the cabinet at the inlet2Heat exchange line, air passing through CO when fan is turned on2The outside of the heat exchange pipeline is cooled, then the heat generated in the cabinet is taken away, and the refrigerating capacity of the system can be changed by adjusting the air quantity of the fan;
CO after heat exchange and temperature rise with air2By CO2Outlet into CO2Return line, when CO2CO in return line2When the working medium pressure is lower than 8-12 MPa, the valve is opened by CO2Store tank to CO2Return line filled with CO2Ensuring the pressure to be within the range of 8-12 MPa; CO22The working medium in the return line finally enters CO2A refrigerating unit 1; in addition, CO2The refrigerating unit 1 can flexibly adjust the flow of the working medium according to the requirement and change the cooling capacity of the working medium;
the cabinet is internally provided with CO2Nozzle capable of discharging CO when the cabinet is on fire2Spout inside the rack, play the effect of cooling and isolated oxygen, release the air of ordinary pressure with highly compressed supercritical carbon dioxide, carbon dioxide can get into the diphasic district and present low temperature gas-liquid two-phase state, and microthermal liquid carbon dioxide sprays can the powerful cooling rack on the rack, and can not cause the chemical injury to the rack.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.

Claims (5)

1. The utility model provides an use rack cooling system of carbon dioxide as working medium which characterized in that: comprising CO2Refrigerating unit, CO2Supply line, cabinet, CO2Return line and CO2A storage tank, the cabinet comprises a cabinet body and CO arranged on the cabinet body2Import, CO2Outlet, CO2Heat exchange line and fan, the CO2CO passing through refrigerating unit2CO with supply line connected to the cabinet2Inlet, the CO2The inlet is connected to the CO2At one end of the heat exchange line, the CO2The other end of the heat exchange pipeline is connected to the CO2Outlet, CO of the cabinet body2Outlet through CO2A return line is connected to the CO2Storage tank of said CO2Storage tank passing CO2A return line is connected to the CO2A refrigeration unit.
2. The cabinet cooling system using carbon dioxide as working medium according to claim 1, wherein: the CO is2A valve is arranged on the storage tank.
3. The cabinet cooling system using carbon dioxide as working medium according to claim 1, wherein: CO is arranged on the cabinet body of the cabinet2Nozzle of said CO2A nozzle connected to the CO2A supply line.
4. The cabinet cooling system using carbon dioxide as working medium according to claim 1, wherein: the air volume of the fan is adjustable, and the CO is2The opening and closing of the nozzle can be adjusted.
5. The cabinet cooling method using carbon dioxide as working medium according to claim 1, wherein: the method comprises the following steps:
S1、CO2supplying: CO22CO regulation for refrigerating unit2The pressure of the supply pipeline is 8-12 MPa, the temperature is 2-7 ℃, so that the supercritical CO is obtained2And subjecting the supercritical CO2By CO2The supply pipe is input into the cabinet;
s2, cooling and heat exchange: CO22Supercritical CO in the supply line2By CO2CO entering the cabinet at the inlet2Heat exchange pipeline, fan opening, air in cabinetGas stream of CO2The outside of the heat exchange pipeline is cooled, heat generated in the cabinet is taken away, and the refrigerating capacity of the system is changed by adjusting the air quantity of the fan;
S3、CO2refluxing: CO after heat exchange and temperature rise with air2By CO2Outlet into CO2Return line with CO2Store tank to CO2Return line filled with CO2Ensuring CO2CO in return line2The pressure is 8-12 MPa, and CO2CO in the return line2Finally enter CO2A refrigeration unit; at the same time, CO2The refrigerating unit can flexibly adjust CO according to the requirement2The flow rate of the working medium is changed, and the cooling capacity of the working medium is changed.
CN202010551498.6A 2020-06-17 2020-06-17 Cabinet cooling system and method using carbon dioxide as working medium Pending CN111609580A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112902485A (en) * 2021-01-29 2021-06-04 浙江英诺绿能科技有限公司 Dual-purpose system for refrigeration and fire fighting
CN116826569A (en) * 2023-06-28 2023-09-29 江苏铭安电气有限公司 Safe photovoltaic box-type substation convenient to overhaul

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JP2005172416A (en) * 2003-11-21 2005-06-30 Mayekawa Mfg Co Ltd Ammonia/co2 refrigeration system
CN103344090A (en) * 2013-06-19 2013-10-09 曲昭波 Liquefied air refrigeration and fire extinguishing system
CN203964432U (en) * 2014-07-25 2014-11-26 北京市京科伦冷冻设备有限公司 A kind of carbon dioxide refrigeration apparatus structure
CN205980107U (en) * 2016-08-03 2017-02-22 上海冰核时代科技中心(有限合伙) A CO2 refrigerating system for high heat density data center
CN108317648A (en) * 2018-01-26 2018-07-24 青岛理工大学 One kind is with CO2For the data center module heat pipe air conditioner system of refrigerant
CN212806127U (en) * 2020-06-17 2021-03-26 天津大学 Cabinet cooling system using carbon dioxide as working medium

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005172416A (en) * 2003-11-21 2005-06-30 Mayekawa Mfg Co Ltd Ammonia/co2 refrigeration system
CN103344090A (en) * 2013-06-19 2013-10-09 曲昭波 Liquefied air refrigeration and fire extinguishing system
CN203964432U (en) * 2014-07-25 2014-11-26 北京市京科伦冷冻设备有限公司 A kind of carbon dioxide refrigeration apparatus structure
CN205980107U (en) * 2016-08-03 2017-02-22 上海冰核时代科技中心(有限合伙) A CO2 refrigerating system for high heat density data center
CN108317648A (en) * 2018-01-26 2018-07-24 青岛理工大学 One kind is with CO2For the data center module heat pipe air conditioner system of refrigerant
CN212806127U (en) * 2020-06-17 2021-03-26 天津大学 Cabinet cooling system using carbon dioxide as working medium

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112902485A (en) * 2021-01-29 2021-06-04 浙江英诺绿能科技有限公司 Dual-purpose system for refrigeration and fire fighting
CN116826569A (en) * 2023-06-28 2023-09-29 江苏铭安电气有限公司 Safe photovoltaic box-type substation convenient to overhaul
CN116826569B (en) * 2023-06-28 2024-01-12 江苏铭安电气有限公司 Safe photovoltaic box-type substation convenient to overhaul

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