CN105758033A - Energy-efficient cooling system and method for data center - Google Patents
Energy-efficient cooling system and method for data center Download PDFInfo
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- CN105758033A CN105758033A CN201610284280.2A CN201610284280A CN105758033A CN 105758033 A CN105758033 A CN 105758033A CN 201610284280 A CN201610284280 A CN 201610284280A CN 105758033 A CN105758033 A CN 105758033A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2339/00—Details of evaporators; Details of condensers
- F25B2339/04—Details of condensers
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses an energy-efficient cooling system and method for a data center. The energy-efficient cooling system is characterized by comprising a condensation liquid reservoir, a working substance pump, a throttling electromagnetic valve, throttling devices, a natural cooling electromagnetic valve, cabinet cooling machines, a compressor electromagnetic valve, a compressor, a one-way valve, a compressor bypath electromagnetic valve and a condensing device. After flowing out of the condensation liquid reservoir, liquid working substances firstly flow to the working substance pump or the throttling electromagnetic valve, and enter the cabinet cooling machines through the throttling electromagnetic valve and the throttling devices, or through the working substance pump and the natural cooling electromagnetic valve; working substance gas flows into the condensing device sequentially through the compressor electromagnetic valve, the compressor and the one-way valve or through the compressor bypath electromagnetic valve after being throttled and evaporated, and finally, the working substance gas is condensed and stored in the condensation liquid reservoir. The energy-efficient cooling system disclosed by the invention is simple in structure, convenient to mount, capable of saving energy and reducing consumption, and high in energy efficiency ratio, the energy efficiency ratio can reach 4.6 or above when the compressor is in refrigeration, and the energy efficiency ratio can reach 12 when the outdoor temperature is low.
Description
Technical field
The present invention relates to technical field of air conditioner refrigeration, particularly relate to a kind of energy-efficient cold supply system of data center and for cooling method.
Background technology
Chinese IDC market rapid development in 2014, market scale reaches 372.2 hundred million yuans, and speedup reaches 41.8% on year-on-year basis.Past 6 years, China's IDC market compound growth rate reached 38.6%, the arrival in 4G epoch, made China's communications industry march toward further new peak.The future of the polynary IDC of turning to of service application brings broader prospect, constantly bringing forth new ideas of the emerging technology such as big data, cloud computing, Internet of Things, advances IDC market constantly to improve.In conjunction with market overall situation, next three years IDC market speedup will stabilise at more than 30%.By 2017, China's IDC market scale will more than 90,000,000,000, and speedup will close to 40%.State Council has issued " about promoting that cloud computing innovation and development cultivates the suggestion of the new industry situation of information industry " in February, 2015, and support the government buying cloud computing service.Two to three line cities are progressively expanded in current government affairs cloud market to, and numerous cloud service provider are benefited from it.Next three years, government affairs cloud market will enter rapid growth period.The energy supply of data center's refrigeration is also proposed huge challenge by the fast development of data center, and therefore energy-conservation green data center becomes the trend of development.The standard of government's relevant green data center construction in 2014 specifies: the data center of newly-built PUE > 1.5 is forbidden in Beijing area.The regional extent that this policy following is suitable for is likely to expand continuation.Meanwhile, IDC Service Provider and Internet enterprises also strengthen green data center dynamics of investment.And the Energy Efficiency Ratio of the conventional compression mechanism cold that data center uses is typically only about 2.5 now, even if to ambient temperature in winter relatively low time remain a need for consuming substantial amounts of electric energy and start compressor and to provide cold for data center, cause the significant wastage of the energy, the requirement of green data center can not be reached far away.
Summary of the invention
Because the drawbacks described above of prior art, the technical problem to be solved be to provide a kind of form simple, easy for installation, save installing space, improve machine room utilization rate, shorten air supplying distance, effectively eliminate focus, the energy-efficient cold supply system of data center that Energy Efficiency Ratio is high.
nullFor achieving the above object，The energy-efficient cold supply system of one data center of the present invention，It is characterized in that: include compressor、Check valve、Condensation reservoir、Working medium pump、Natural cooling electromagnetic valve、Throttle solenoid valve、Throttling arrangement、Rack is for cooler、Compressor electromagnetic valve、Compressor electromagnetic valve、Rack and chiller，The outlet of the liquid refrigerant of liquid refrigerant tank is connected with the entrance of working medium pump and the entrance of throttle solenoid valve respectively，The outlet of throttle solenoid valve is connected with the entrance of throttling arrangement，Working medium delivery side of pump is connected with the entrance of natural cooling electromagnetic valve，The natural outlet of cooling electromagnetic valve is connected with the outlet of throttling arrangement and is connected for the entrance of cooler with the rack in rack，Rack is connected with the entrance of the entrance of compressor electromagnetic valve and compressor electromagnetic valve respectively for the outlet of cooler，The outlet of compressor electromagnetic valve is connected with the entrance of compressor，The outlet of compressor is connected with the entrance of check valve，The outlet of check valve be connected with the outlet of compressor electromagnetic valve and with the condensation gas working medium entrance of reservoir and being connected.
The above-mentioned energy-efficient cold supply system of a kind of data center, it is characterized in that: described condensing unit is made up of cooling tower and water circulating pump, wherein cooling tower input is connected with condensation reservoir gas working medium arrival end, cooling tower outfan is connected with water circulating pump, and water circulating pump outfan connects back again the condensation reservoir liquid working substance port of export.
The above-mentioned energy-efficient cold supply system of a kind of data center, it is characterised in that: the bottom of described condensation reservoir exceeds more than the entrance lm of working medium pump.
The above-mentioned energy-efficient cold supply system of a kind of data center, it is characterised in that: described working medium pump is the working medium pump of the multiple kind being adapted to refrigeration working medium.
The above-mentioned energy-efficient cold supply system of a kind of data center, it is characterised in that: described rack can be close to the vertical structure in the ranks that rack is arranged for cooler, it is also possible to for being arranged on the furred ceiling horizontal type structure above rack.
The above-mentioned energy-efficient cold supply system of a kind of data center, it is characterised in that: described rack is one or more for cooler, if multiple, adopts parallel-connection structure.
A kind of confession cooling method of the energy-efficient cold supply system of above-mentioned data center, its method is as follows:
(1) when outdoor temperature is higher:
First, freezed by compressor, now compressor operating, compressor electromagnetic valve is opened, compressor bypass closed electromagnetic valve, working medium cooling closed electromagnetic valve out of service, natural, throttle solenoid valve are opened, becoming the refrigeration working medium gas of High Temperature High Pressure after compressor contracts through the refrigeration working medium gas of throttling and evaporation, refrigeration working medium gas enters condensation reservoir through check valve and condenses；
Then, liquid refrigerant be stored in condensation reservoir bottom, liquid refrigerant from condensation reservoir 5 out after, enter in throttling arrangement through throttle solenoid valve, entering back into rack in cooler, liquid refrigerant again becomes Working medium gas after throttling and evaporation, proceeds circulation；
(2) when the saturation temperature of working medium in ambient temperature is lower than vaporizer:
Now, compressor closed electromagnetic valve, compressor bypass electromagnetic valve are opened, working medium pump is opened, natural cooling electromagnetic valve is opened, throttle solenoid valve is closed, working medium pump is started working, liquid refrigerant is extracted by working medium pump from condensation reservoir, liquid refrigerant enters rack in cooler through natural cooling electromagnetic valve, being directly entered in condensation reservoir for cooler refrigeration working medium out through compressor bypass solenoid valve by rack, then condensation is stored in the bottom of condensation reservoir, proceeds circulation.
The invention has the beneficial effects as follows:
1, present configuration is simple, easy for installation, easily operates, it is simple to safeguard；
2, the rack of the present invention is for cooler owing to being arranged between rack, decreases air supplying distance, reduces air-supply power, and blower fan can save energy and reaches 30%；
3, due to the fact that rack is arranged between rack or enclosure top for cooler, air supplying distance shortens, it is ensured that cold all acts on rack, decrease the loss of cold, save the energy, shortening simultaneously it is also ensured that eliminate focus comprehensively of air supplying distance, better ensure the safety of machine room data；
4, due to the fact that rack can be arranged for cooler between cabinet or ceiling mounting type formula is arranged, machine room need not arrange special conditioned area, it is possible to saves substantial amounts of valuable use space for data center module, improves the space availability ratio of data center module；
5, the present invention is when system is compressor cooling, concentrates water-cooled because adopting, therefore its Energy Efficiency Ratio can reach more than 4.6, and its Energy Efficiency Ratio is significantly larger than common air-cooled, efficient energy-saving；
6, the present invention is when the saturation temperature of working medium in outdoor environment temperature is lower than vaporizer, working medium pump is utilized to make liquid refrigerant complete kind of refrigeration cycle by rack for cooler evaporation endothermic, because the power consumption of working medium pump is less than the 1/10 of compressor power consumption, therefore Energy Efficiency Ratio is up to more than 12, Energy Efficiency Ratio to be significantly larger than common refrigeration, thus when not reducing refrigerating capacity, it is achieved mental retardation highly effective refrigeration, effectively realize the energy-efficient of cold supply system.
Below with reference to accompanying drawing, the technique effect of the design of the present invention, concrete structure and generation is described further, to be fully understood from the purpose of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
The implication of accompanying drawing labelling in figure:
1-compressor, 2-check valve, 3-cooling tower, 4-water circulating pump, 5-condenses reservoir,
6-working medium pump, 7-nature cooling electromagnetic valve, 8-throttle solenoid valve, 9-throttling arrangement,
10-rack confession cooler, 11-compressor electromagnetic valve, 12-compressor electromagnetic valve,
20-rack.
Detailed description of the invention
As shown in Figure 1, the energy-efficient cold supply system of data center of the present invention, it includes with lower component: condensation reservoir 5, working medium pump 6, natural cooling electromagnetic valve 7, throttle solenoid valve 8, throttling arrangement 9, rack are for cooler 10, compressor electromagnetic valve 11, compressor 1, check valve 2, compressor electromagnetic valve 12 and condensing unit, wherein, condensing unit is made up of cooling tower 3 and water circulating pump 4.
Annexation each parts between is described below:
The outlet of the liquid refrigerant of liquid refrigerant tank 5 is connected with the entrance of the entrance of working medium pump 6 and throttle solenoid valve 8 respectively, the outlet of throttle solenoid valve 8 is connected with the entrance of throttling arrangement 9, the outlet of working medium pump 6 is connected with the entrance of natural cooling electromagnetic valve 7, the natural outlet of cooling electromagnetic valve 7 is connected with the outlet of throttling arrangement 9 and is connected for the entrance of cooler 10 with the rack in rack 20, rack is connected with the entrance of the entrance of compressor electromagnetic valve 12 and compressor electromagnetic valve 11 respectively for the outlet of cooler 10, the outlet of compressor electromagnetic valve 11 is connected with the entrance of compressor 1, the outlet of compressor 1 is connected with the entrance of check valve 2, the outlet of check valve 2 is connected with the outlet of compressor electromagnetic valve 12 and the condensation entrance of reservoir 5 and being connected.
Described condensing unit is made up of cooling tower 3 and water circulating pump 4, wherein cooling tower 3 input is connected with condensation reservoir 5 gas working medium arrival end, cooling tower 3 outfan is connected with water circulating pump 4, and water circulating pump 4 outfan connects back again the condensation reservoir 5 liquid working substance port of export.
In the present embodiment, during installation, the bottom of condensation reservoir 5 exceeds more than the entrance lm of working medium pump 6, to avoid the working medium gasification of working medium pump 6 porch.Condensation reservoir 5 is large-scale condensation liquid storage equipment, refrigeration working medium can be carried out condensation cooling by this equipment, refrigeration working medium can be stored again, one multiple function of equipment, simplified system complexity, the liquid refrigerant stored can also be carried out supercool by this equipment, increases the cooling ability of system, efficient energy-saving.
In the present embodiment, described working medium pump is the working medium pump of the multiple kind being adapted to refrigeration working medium, for instance canned motor pump, magnetic drive pump, gear pump etc..
In the present embodiment, described rack can be close to the vertical structure in the ranks that rack is arranged for cooler, it is also possible to for being arranged on the furred ceiling horizontal type structure above rack.
The energy-efficient cold supply system of data center of the present invention, its rack can be 1-200 for the quantity of cooler 10, and when rack is for quantity >=2 of cooler 10, rack is attached for employing parallel connection between cooler 10.
Equipped with liquid refrigerant in condensation reservoir 5, the liquid refrigerant flow direction in this air conditioner cooling system is described below:
(1) condensation reservoir 5 in out after, first flow to working medium pump 6, or flow to throttle solenoid valve 8；
(2) then flowing through throttling arrangement 9 and enter rack for cooler 10, or get around throttle solenoid valve 8 and throttling arrangement 9 directly natural cooling electromagnetic valve 7 enters rack for cooler 10, liquid refrigerant becomes Working medium gas after throttling and evaporation；
(3) Working medium gas sequentially passes through compressor electromagnetic valve 11, compressor 1 and check valve 2 and flows to condensing unit, or Working medium gas is walked around compressor 1 and directly flow to condensing unit via compressor electromagnetic valve 12；
(4) liquid refrigerant obtained after condensing unit cools down finally is stored in condensation reservoir 5 and is circulated use.
The air conditioner cooling system of the present invention, it is as follows for cooling method:
(1) when outdoor temperature is higher:
System is freezed by compressor, now compressor 1 runs, compressor electromagnetic valve 11 is opened, compressor bypass electromagnetic valve 12 cuts out, working medium pump 7 is out of service, natural cooling electromagnetic valve 7 cuts out, throttle solenoid valve 8 is opened, after compressor 1 compresses, the refrigeration working medium gas of High Temperature High Pressure is become through the refrigeration working medium gas of throttling and evaporation, refrigeration working medium gas enters condensation reservoir 5 through check valve 2 and condenses, then liquid refrigerant is stored in the bottom of condensation reservoir 5, liquid refrigerant from condensation reservoir 5 out after, enter in throttling arrangement 9 through throttle solenoid valve 8, enter back into rack in cooler 10, liquid refrigerant again becomes Working medium gas after throttling and evaporation, proceed circulation.
(2) when the saturation temperature of working medium in ambient temperature is lower than vaporizer:
System no longer adopts compressor to freeze, now compressor electromagnetic valve 11 cuts out, compressor bypass electromagnetic valve 12 is opened, working medium pump 6 is opened, natural cooling electromagnetic valve 7 is opened, throttle solenoid valve 8 is closed, working medium pump 6 is started working, liquid refrigerant is extracted by working medium pump 6 from condensation reservoir 5, liquid refrigerant enters rack in cooler 10 through natural cooling electromagnetic valve 7, it is directly entered in condensation reservoir 5 for cooler 10 refrigeration working medium out through compressor bypass solenoid valve 12 by rack, then condensation is stored in the bottom of condensation reservoir 5, proceeds circulation.
As can be seen here, the air conditioner cooling system of the present invention, it has a characteristic that
(1) composition is simple, easy for installation；
(2) rack is for cooler 10 owing to being arranged between rack, decreases air supplying distance, reduces air-supply power, and blower fan can save energy and reaches 30%；
(3) owing to rack is arranged between rack for cooler 10, air supplying distance shortens, it is ensured that cold all acts on rack, decrease the loss of cold, save the energy, shortening simultaneously it is also ensured that eliminate focus comprehensively of air supplying distance, better ensure the safety of machine room data；
(4) owing to rack is arranged for the rack room of cooler 10, machine room need not arrange special conditioned area, it is possible to saves the substantial amounts of valuable space that uses, the space availability ratio of raising data center module for data center module；
(5) when system is compressor cooling, concentrating water-cooled because adopting, therefore its Energy Efficiency Ratio can reach more than 4.6, and its Energy Efficiency Ratio is significantly larger than common air-cooled, efficient energy-saving；
(6) when the saturation temperature of working medium in outdoor environment temperature is lower than vaporizer, working medium pump 6 is utilized to make liquid refrigerant complete kind of refrigeration cycle by rack for cooler 10 evaporation endothermic, because the power consumption of working medium pump 6 is less than the 1/10 of compressor 1 power consumption, therefore Energy Efficiency Ratio is up to more than 12, thus when not reducing refrigerating capacity, realize mental retardation highly effective refrigeration, effectively realize the energy-efficient of cold supply system.
Owing to common air-cooled pattern Energy Efficiency Ratio is about 2.5, and the Energy Efficiency Ratio of the both of which that the air conditioner cooling system of the present invention runs will be significantly larger than common refrigeration, so, the energy-efficient cold supply system of the present invention has good energy-efficient effect.
Owing to data center module cold supply system is to run under the pattern of 7 × 24 hours, even if in the area operation in only of short duration winter, using the energy-efficient cold supply system of the present invention still can bring bigger energy-saving effect.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should in the protection domain being defined in the patent claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (8)
- null1. the energy-efficient cold supply system of data center，It is characterized in that: include compressor (1)、Check valve (2)、Condensation reservoir (5)、Working medium pump (6)、Natural cooling electromagnetic valve (7)、Throttle solenoid valve (8)、Throttling arrangement (9)、Rack is for cooler (10)、Compressor electromagnetic valve (11)、Compressor electromagnetic valve (12)、Rack (20) and chiller，The outlet of the liquid refrigerant of liquid refrigerant tank (5) is connected with the entrance of the entrance of working medium pump (6) and throttle solenoid valve (8) respectively，The outlet of throttle solenoid valve (8) is connected with the entrance of throttling arrangement (9)，The outlet of working medium pump (6) is connected with the entrance of natural cooling electromagnetic valve (7)，The outlet of natural cooling electromagnetic valve (7) is connected with the outlet of throttling arrangement (9) and is connected for the entrance of cooler (10) with the rack in rack (20)，Rack is connected with the entrance of the entrance of compressor electromagnetic valve (12) and compressor electromagnetic valve (11) respectively for the outlet of cooler (10)，The outlet of compressor electromagnetic valve (11) is connected with the entrance of compressor (1)，The outlet of compressor (1) is connected with the entrance of check valve (2)，The outlet of check valve (2) be connected with the outlet of compressor electromagnetic valve (12) and with condensation reservoir (5) gas working medium entrance and be connected.
- 2. the energy-efficient cold supply system of a kind of data center as claimed in claim 1, it is characterized in that: described condensing unit is made up of cooling tower (3) and water circulating pump (4), wherein cooling tower (3) input is connected with condensation reservoir (5) gas working medium arrival end, cooling tower (3) outfan is connected with water circulating pump (4), and water circulating pump (4) outfan connects back again condensation reservoir (5) the liquid working substance port of export.
- 3. the energy-efficient cold supply system of a kind of data center as claimed in claim 1, it is characterised in that: the bottom of described condensation reservoir (5) exceeds more than the entrance lm of working medium pump (6).
- 4. the energy-efficient cold supply system of a kind of data center as claimed in claim 1, it is characterised in that: described working medium pump (6) is the working medium pump of the multiple kind being adapted to refrigeration working medium.
- 5. the energy-efficient cold supply system of a kind of data center as claimed in claim 1, it is characterized in that: described rack can for be close to the vertical structure in the ranks that rack (20) is arranged for cooler (10), it is also possible to for being arranged on the furred ceiling horizontal type structure of rack (20) top.
- 6. the energy-efficient cold supply system of a kind of data center as claimed in claim 1, it is characterised in that: described rack is one or more for cooler (10), if multiple, adopts parallel-connection structure.
- 7. the confession cooling method of the energy-efficient cold supply system of the data center utilized described in claim 1 to 6 any one, it is characterised in that its method is as follows:(1) when outdoor temperature is higher:First, freezed by compressor, now compressor operating, compressor electromagnetic valve is opened, compressor bypass closed electromagnetic valve, working medium cooling closed electromagnetic valve out of service, natural, throttle solenoid valve are opened, becoming the refrigeration working medium gas of High Temperature High Pressure after compressor contracts through the refrigeration working medium gas of throttling and evaporation, refrigeration working medium gas enters condensation reservoir through check valve and condenses；Then, liquid refrigerant be stored in condensation reservoir bottom, liquid refrigerant from condensation reservoir 5 out after, enter in throttling arrangement through throttle solenoid valve, entering back into rack in cooler, liquid refrigerant again becomes Working medium gas after throttling and evaporation, proceeds circulation；(2) when the saturation temperature of working medium in ambient temperature is lower than vaporizer:Now, compressor closed electromagnetic valve, compressor bypass electromagnetic valve are opened, working medium pump is opened, natural cooling electromagnetic valve is opened, throttle solenoid valve is closed, working medium pump is started working, liquid refrigerant is extracted by working medium pump from condensation reservoir, liquid refrigerant enters rack in cooler through natural cooling electromagnetic valve, being directly entered in condensation reservoir for cooler refrigeration working medium out through compressor bypass solenoid valve by rack, then condensation is stored in the bottom of condensation reservoir, proceeds circulation.
- 8. one kind utilize described in claim 7 for cooling method, it is characterised in that described in cooling method, liquid refrigerant in described air conditioner cooling system to flow to step as follows:(1) condensation reservoir in out after, first flow to working medium pump, or flow to throttle solenoid valve；(2) then flowing through throttling arrangement and enter rack for cooler, or get around throttle solenoid valve and throttling arrangement directly natural cooling electromagnetic valve enters rack for cooler, liquid refrigerant becomes Working medium gas after throttling and evaporation；(3) Working medium gas sequentially passes through compressor electromagnetic valve, compressor and check valve and flows to condensing unit, or Working medium gas is walked around compressor 1 and directly flow to condensing unit via compressor electromagnetic valve；(4) liquid refrigerant obtained after condensing unit cools down finally is stored in condensation reservoir and is circulated use.
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| CN201610284280.2A CN105758033A (en) | 2016-04-29 | 2016-04-29 | Energy-efficient cooling system and method for data center |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110094818A (en) * | 2019-06-10 | 2019-08-06 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of data center's compound air-conditioning system and its control method |
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