CN116437631A - Data center wind-water economizer combined refrigerating system and working method thereof - Google Patents

Data center wind-water economizer combined refrigerating system and working method thereof Download PDF

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Publication number
CN116437631A
CN116437631A CN202310374726.0A CN202310374726A CN116437631A CN 116437631 A CN116437631 A CN 116437631A CN 202310374726 A CN202310374726 A CN 202310374726A CN 116437631 A CN116437631 A CN 116437631A
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valve
cooling
air
heat exchanger
inlet
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CN202310374726.0A
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Chinese (zh)
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江航
白雪莲
李佐洋
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Chongqing University
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Chongqing University
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Priority to CN202310374726.0A priority Critical patent/CN116437631A/en
Publication of CN116437631A publication Critical patent/CN116437631A/en
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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
    • F25B41/40—Fluid line 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20718—Forced ventilation of a gaseous coolant
    • H05K7/20745—Forced ventilation of a gaseous coolant within rooms for removing heat from cabinets, e.g. by air conditioning device
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20763—Liquid cooling without phase change
    • H05K7/2079—Liquid cooling without phase change within rooms for removing heat from cabinets
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
    • H05K7/20836—Thermal management, e.g. server temperature control
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a data center wind-water economizer combined refrigerating system and a working method thereof, wherein the refrigerating system comprises a data center machine room and an air conditioning unit, and further comprises a water side economizer and a wind side economizer, wherein the water side economizer and the wind side economizer are both communicated with the air conditioning unit, the water side economizer comprises a water side valve assembly, the water side economizer can form a mechanical cooling path, a partial water side natural cooling path and a full water side natural cooling path through the adjustment of the water side valve assembly, the wind side economizer comprises a wind side valve assembly, and the wind side economizer can form a full wind side natural cooling path through the adjustment of the wind side valve assembly. The invention can reduce water consumption and has higher use safety, thereby improving energy conservation, water conservation and climate adaptability.

Description

Data center wind-water economizer combined refrigerating system and working method thereof
Technical Field
The invention relates to the technical field of refrigeration, in particular to a data center wind-water economizer combined refrigeration system and a working method thereof.
Background
The data center machine room is a place for storing the data processor and the server, a large number of racks are arranged in the data center machine room and used for placing electronic equipment, the electronic equipment can continuously generate heat in the working process, the normal operation of the electronic equipment can be affected when the temperature of the data center machine room is high, and the electronic equipment can be burnt out when the temperature is severe.
The existing data center machine room is cooled by installing an air conditioning unit, the energy consumption of the air conditioning unit is large, and the cooling cost of the data center machine room is increased. In order to reduce the cooling cost of the data center machine room, the existing data center machine room is also introduced with a water side economizer or a wind side economizer for cooling and refrigerating the data center machine room, when the water side economizer cools and refrigerates the data center machine room, and when outdoor environment conditions meet certain requirements, cold water is prepared by utilizing cold energy stored in outdoor air, and the cold load of an air conditioning unit of the data center machine room is partially or completely borne, but the water consumption of the mode is huge; when the air side economizer cools and refrigerates the data center machine room, when outdoor air meets certain requirements, outdoor fresh air is directly introduced and mixed with return air, and the mixture is processed to a wind feeding state point through humidification or cooling and the like and then fed into a room, but the temperature, the humidity and the cleanliness of the outdoor air are comprehensively considered, and because the air side economizer directly introduces the fresh air, the heat exchange loss is reduced, the cold energy utilization rate is high, and the air side economizer is influenced by the cleanliness of the outdoor air and has certain risk in use.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to solve the technical problems that: how to provide a data center wind-water economizer combined refrigerating system and a working method thereof, wherein the data center wind-water economizer combined refrigerating system can reduce water consumption and has higher use safety so as to improve energy conservation, water conservation and climate adaptability.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a data center wind-water economizer combines refrigerating system, includes data center computer lab and air conditioning unit, still includes water side economizer and wind side economizer, the water side economizer with wind side economizer all with air conditioning unit intercommunication, the water side economizer includes water side valve subassembly, just the water side economizer through right the adjustment of water side valve subassembly can form mechanical cooling route, partial water side natural cooling route and complete water side natural cooling route, wind side economizer includes wind side valve subassembly, just wind side economizer through right wind side valve subassembly's adjustment can form complete wind side natural cooling route.
The working principle of the invention is as follows: the refrigerating system has various refrigerating modes, when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value or the outdoor air dry bulb temperature is greater than or equal to a set return air temperature, a certain risk exists when outdoor air refrigeration is introduced, so that a water side economizer is adopted for refrigerating, the refrigerating modes comprise a mechanical cooling path, a partial water side natural cooling path or a full water side natural cooling path for cooling a data center room through an air conditioning unit, switching of different cooling paths can be realized through adjustment of a water side valve assembly, therefore, different cooling paths can be selected according to the outdoor air temperature condition, energy consumption is reduced on the basis of ensuring use safety, and when the concentration of any outdoor pollutant is less than the corresponding set value and the outdoor air dry bulb temperature is less than or equal to the set return air temperature, the full air side natural cooling path is adopted for cooling the data center room through the air conditioning unit, so that energy consumption and water consumption are further reduced on the basis of ensuring use safety, and energy conservation, water conservation and weather adaptability of the refrigerating system are further improved.
Therefore, the scheme realizes the switching among mechanical refrigeration, full wind side natural cooling, partial water side natural cooling and full water side natural cooling according to outdoor weather conditions and pollutant conditions, can effectively avoid the pollutant risk problem of the wind side economizer, and has more excellent water saving performance compared with the single water side economizer, thereby improving the energy conservation, water conservation and climate adaptability of the economizer.
Preferably, the water side economizer comprises a cooling tower, a chiller and a heat exchanger, the heat exchanger comprises a cooling water side and a chilled water side, the chiller comprises a condenser and an evaporator, the cooling water side of the cooling tower, the heat exchanger and the condenser are positioned on a cooling water loop, the chilled water side of the heat exchanger and the evaporator are positioned on a chilled water loop, an outlet end of the cooling tower is connected with an inlet end of the cooling water side of the heat exchanger, an outlet end of the cooling water side of the heat exchanger is connected with an inlet end of the condenser, an outlet end of the condenser is connected with an inlet end of the cooling tower, the water side valve assembly comprises a first valve assembly and a second valve assembly, and the first valve assembly is arranged at the condenser so that cooling water of the cooling tower does not pass through the condenser, partially passes through the condenser or completely passes through the condenser through the first valve assembly; the second valve assembly is positioned on the cooling water side of the heat exchanger, so that the cooling water of the cooling tower does not pass through the heat exchanger or completely passes through the heat exchanger through the adjustment of the second valve assembly;
The inlet end of the chilled water side of the heat exchanger is connected with the outlet end of the cooling coil of the air conditioning unit, the outlet end of the chilled water side of the heat exchanger is connected with the inlet end of the evaporator, the outlet end of the evaporator is connected with the inlet end of the cooling disc of the air conditioning unit, the water side valve assembly further comprises a third valve assembly and a fourth valve assembly, and the third valve assembly is arranged at the evaporator so that chilled water passes through the evaporator or does not pass through the evaporator through the adjustment of the third valve assembly; the fourth valve assembly is positioned on the chilled water side of the heat exchanger such that chilled water passes through the heat exchanger, or does not pass through the heat exchanger, by adjustment of the fourth valve assembly.
When the mechanical cooling path is adopted to cool the data center machine room through the air conditioning unit, the first valve component and the second valve component are adjusted at the cooling water side, so that cooling water flows out from the outlet end of the cooling tower, does not pass through the heat exchanger and completely passes through the condenser and then returns to the inlet end of the cooling tower; on the chilled water side, adjusting the third valve assembly and the fourth valve assembly so that chilled water flows from the outlet end of the evaporator through the cooling coil of the air conditioning unit and returns to the inlet end of the evaporator without passing through the heat exchanger; when the natural cooling path of the part of water side is adopted to cool the data center machine room through the air conditioning unit, the first valve component and the second valve component are regulated on the cooling water side, so that cooling water flows out from the outlet end of the cooling tower and completely passes through the heat exchanger and partially or completely passes through the condenser and returns to the inlet end of the cooling tower; on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water flows from the outlet end of the evaporator, through the cooling coil of the air conditioning unit, and then completely passes through the heat exchanger to return to the inlet end of the evaporator; when the complete water side natural cooling path is adopted to cool the data center machine room through the air conditioning unit, the first valve component and the second valve component are regulated on the cooling water side, so that cooling water flows out from the outlet end of the cooling tower, completely passes through the heat exchanger and returns to the inlet end of the cooling tower without passing through the condenser; and on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water completely passes through the heat exchanger and then returns to the cooling coil of the air conditioning unit after passing through the cooling coil of the air conditioning unit. Thus, by adjusting the first valve assembly, the second valve assembly, the third valve assembly and the fourth valve assembly, switching of the mechanical cooling path, the partial water side natural cooling path and the full water side natural cooling path can be achieved.
Preferably, a first bypass pipe is further arranged between the inlet end and the outlet end of the condenser, the first valve component comprises a first inlet electric regulating valve and a first bypass electric regulating valve, the first inlet electric regulating valve is arranged at the inlet end of the condenser, and the first bypass electric regulating valve is arranged on the first bypass pipe;
a second bypass pipe is further arranged between the inlet end and the outlet end of the cooling water side of the heat exchanger, the second valve assembly comprises a second inlet electric valve and a second bypass electric valve, the second inlet electric valve is arranged at the inlet end of the cooling water side of the heat exchanger, and the second bypass electric valve is arranged on the second bypass pipe;
a third bypass pipe is further arranged between the inlet end and the outlet end of the evaporator, the third valve assembly comprises a third inlet electric valve and a third bypass electric valve, the third inlet electric valve is arranged at the inlet end of the evaporator, and the third bypass electric valve is arranged on the third bypass pipe;
a fourth bypass pipe is further arranged between the inlet end and the outlet end of the chilled water side of the heat exchanger, the fourth valve assembly comprises a fourth inlet electric valve and a fourth bypass electric valve, the fourth inlet electric valve is arranged at the inlet end of the chilled water side of the heat exchanger, and the fourth bypass electric valve is arranged on the fourth bypass pipe.
When the mechanical cooling path is adopted to cool the data center machine room through the air conditioning unit, the first inlet electric regulating valve and the second bypass electric valve are opened at the cooling water side, and the first bypass electric regulating valve and the second inlet electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and returns to the inlet end of the cooling tower after passing through the second bypass electric valve, the first inlet electric regulating valve and the condenser in sequence; on the chilled water side, a third inlet electric valve and a fourth bypass electric valve are opened, and the third bypass electric valve and the fourth inlet electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth bypass electric valve and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator; when a part of water side natural cooling paths are adopted to cool a data center machine room through an air conditioning unit, a first inlet electric regulating valve, a first bypass electric regulating valve and a second inlet electric valve are opened at the cooling water side, and the second bypass electric valve is closed, so that cooling water flows out from an outlet end of a cooling tower and then sequentially passes through the second inlet electric valve and a heat exchanger to be divided into two paths, wherein one path returns to an inlet end of the cooling tower after passing through the first inlet electric regulating valve and a condenser, and the other path returns to an inlet end of the cooling tower after passing through the first bypass electric regulating valve, and the opening degree of the first inlet electric regulating valve and the opening degree of the first bypass electric regulating valve are regulated to regulate the cooling water quantity passing through the condenser; on the chilled water side, a third inlet electric valve and a fourth inlet electric valve are opened, and a third bypass electric valve and a fourth bypass electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth inlet electric valve, a heat exchanger and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator; when the complete water side natural cooling path is adopted to cool the data center machine room through the air conditioning unit, on the cooling water side, a first bypass electric regulating valve and a second inlet electric valve are opened, and the first inlet electric regulating valve and the second bypass electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second inlet electric valve, the heat exchanger and the first bypass electric regulating valve and then returns to the inlet end of the cooling tower; and on the chilled water side, a third bypass electric valve and a fourth inlet electric valve are opened, and the third inlet electric valve and the fourth bypass electric valve are closed, so that chilled water passes through the cooling coil of the air conditioning unit and then sequentially passes through the fourth inlet electric valve, the heat exchanger and the third bypass electric valve and then returns to the evaporator.
Preferably, the water side economizer further comprises a cooling water pump and a chilled water pump, wherein the cooling water pump is arranged between the outlet end of the cooling tower and the inlet end of the cooling water side of the heat exchanger, and the chilled water pump is arranged between the inlet end of the chilled water side of the heat exchanger and the outlet end of the cooling coil pipe of the air conditioning unit.
Thus, the cooling water pump adopts a variable-frequency cooling water pump, and the chilled water pump adopts a variable-frequency chilled water pump.
Preferably, the air side economizer comprises an exhaust section, a return air section, a fresh air section, a mixing section and an air supply section, wherein the mixing section is communicated with an air inlet of the air conditioning unit, the air supply section is respectively connected with an air outlet of the air conditioning unit and an overhead layer of the data center machine room, an air return inlet of the data center machine room is respectively communicated with the exhaust section and the return air section, a first electric air volume regulating valve is arranged on the fresh air section, a second electric air volume regulating valve is arranged on the exhaust section, a third electric air volume regulating valve is arranged on the return air section, and the mixing section is used for mixing air of the return air section and the fresh air section and then feeding the mixed air into the air conditioning unit.
Like this, when wind side economic ware cools off the data center computer lab through air conditioning unit, the complete closure water side valve subassembly opens and adjusts first electronic air regulation valve, second electronic air regulation valve and third electronic air regulation valve simultaneously for after the fresh air of fresh air section mixes with the return air of return air section, send into the overhead floor of data center computer lab after passing through or not passing through humidification processing in air conditioning unit.
Preferably, the fresh air section is further provided with a filter assembly and a preheater in sequence, and the filter assembly comprises a primary filter, a middle-efficiency filter and a high-efficiency filter which are sequentially arranged.
In this way, the filter assembly can change the combination mode of the primary filter, the intermediate filter and the high-efficiency filter according to the outdoor pollutant condition, thereby further ensuring the cleanliness of the outdoor air introduced into the refrigerating system, and the preheater can preheat the introduced outdoor air, thereby preventing the outdoor air from entering the fog area.
The working method of the data center wind-water economizer combined refrigerating system comprises the steps of adopting a mechanical cooling path, a partial water side natural cooling path or a full water side natural cooling path to cool a data center machine room when the concentration of any outdoor pollutant is larger than or equal to a corresponding set value or the temperature of outdoor air dry bulb is larger than or equal to a set return air temperature, and adopting the full wind side natural cooling path to cool the data center machine room when the concentration of any outdoor pollutant is smaller than the corresponding set value and the temperature of outdoor air dry bulb is smaller than or equal to the set return air temperature.
Preferably, the method for cooling the data center room by using the mechanical cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water flows out from an outlet end of the cooling tower, does not pass through the heat exchanger and completely passes through the condenser and returns to an inlet end of the cooling tower; on the chilled water side, adjusting a third valve assembly and a fourth valve assembly so that chilled water flows from the outlet end of the evaporator through the cooling coil of the air conditioning unit and then returns to the inlet end of the evaporator without passing through the heat exchanger;
the method for cooling the data center machine room by adopting the partial water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water completely passes through the heat exchanger after flowing out from the outlet end of the cooling tower and returns to the inlet end of the cooling tower after partially or completely passing through the condenser; on the chilled water side, regulating a third valve assembly and a fourth valve assembly so that chilled water flows through a cooling coil of the air conditioning unit from the outlet end of the evaporator and then completely passes through the heat exchanger to return to the inlet end of the evaporator;
The method for cooling the data center machine room by adopting the complete water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water completely passes through the heat exchanger after flowing out from the outlet end of the cooling tower and returns to the inlet end of the cooling tower without passing through the condenser; and on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water passes through the cooling coil of the air conditioning unit and then completely passes through the heat exchanger and returns to the cooling coil of the air conditioning unit.
Preferably, the method for cooling the data center room by using the mechanical cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first inlet electric regulating valve and a second bypass electric valve are opened, and the first bypass electric regulating valve and the second inlet electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second bypass electric valve, the first inlet electric regulating valve and the condenser and then returns to the inlet end of the cooling tower; on the chilled water side, a third inlet electric valve and a fourth bypass electric valve are opened, and the third bypass electric valve and the fourth inlet electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth bypass electric valve and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator;
The method for cooling the data center machine room by adopting the partial water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first inlet electric regulating valve, a first bypass electric regulating valve and a second inlet electric valve are opened, and the second bypass electric valve is closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second inlet electric valve and the heat exchanger to be divided into two paths, wherein one path returns to the inlet end of the cooling tower after passing through the first inlet electric regulating valve and the condenser, and the other path returns to the inlet end of the cooling tower after passing through the first bypass electric regulating valve, and the opening degree of the first inlet electric regulating valve and the opening degree of the first bypass electric regulating valve are regulated to regulate the cooling water quantity passing through the condenser; on the chilled water side, a third inlet electric valve and a fourth inlet electric valve are opened, and a third bypass electric valve and a fourth bypass electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth inlet electric valve, a heat exchanger and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator;
the method for cooling the data center machine room by adopting the complete water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first bypass electric regulating valve and a second inlet electric valve are opened, and the first inlet electric regulating valve and the second bypass electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second inlet electric valve, the heat exchanger and the first bypass electric regulating valve and then returns to the inlet end of the cooling tower; and on the chilled water side, opening a third bypass electric valve and a fourth inlet electric valve, and closing the third inlet electric valve and the fourth bypass electric valve, so that chilled water passes through the cooling coil of the air conditioning unit and then sequentially passes through the fourth inlet electric valve, the heat exchanger and the third bypass electric valve and then returns to the evaporator.
Preferably, the method for cooling the data center machine room by adopting the complete wind side natural cooling path through the air conditioning unit comprises the following steps: the water side valve assembly is completely closed, and the first electric air quantity regulating valve, the second electric air quantity regulating valve and the third electric air quantity regulating valve are simultaneously opened and regulated, so that the return air of the fresh air section and the return air section is mixed and then is sent to an overhead layer of a data center machine room after being subjected to or not subjected to humidification treatment in an air conditioning unit.
Preferably, the outdoor contaminants include PM 2.5 、PM 10 、SO 2 、H 2 S and Cl 2 The cooling of the data center room by the air conditioning unit through the mechanical cooling path includes: the concentration of any pollutant outside the chamber is larger than or equal to a corresponding set value, and the wet bulb temperature of the outdoor air is larger than the return water temperature of the chilled water, the heat exchange temperature difference between the cooling tower cold width and the heat exchanger; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is more than the set return air temperature, the outdoor air wet bulb temperature is more than the chilled water return water temperature, and the cooling tower cold width-heat exchanger heat exchange temperature difference;
the adoption of the partial water side natural cooling path for cooling the data center machine room through the air conditioning unit comprises the following steps: when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value, and the chilled water supply temperature, the cooling tower cold width and heat exchanger heat exchange temperature difference is less than the outdoor air wet bulb temperature and less than the chilled water return temperature, the cooling tower cold width and plate heat exchanger heat exchange temperature difference; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is greater than the set return air temperature, the chilled water supply temperature, the cooling tower cold width-plate heat exchanger heat exchange temperature difference is less than the outdoor air wet bulb temperature and less than or equal to the chilled water return water temperature, and the cooling tower cold width-plate heat exchanger heat exchange temperature difference;
The adoption of the complete water side natural cooling path for cooling the data center machine room through the air conditioning unit comprises the following steps: when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value and the wet bulb temperature of the outdoor air is less than or equal to the chilled water supply temperature, the heat exchange temperature difference of the cooling tower cold plate-type heat exchanger; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is larger than the set return air temperature, and the outdoor air wet bulb temperature is smaller than or equal to the chilled water supply temperature, the cooling tower cold plate-plate heat exchanger heat exchange temperature difference;
the condition that the data center machine room is cooled by the air conditioning unit through the full air side natural cooling path comprises a full air side natural cooling path without starting a humidifying function and a full air side natural cooling path with starting the humidifying function, when the concentration of any outdoor pollutant is smaller than a corresponding set value, the outdoor air dry bulb temperature is smaller than or equal to a set return air temperature, the outdoor air dew point temperature is larger than or equal to the minimum limit of the data center machine room dew point temperature, the full air side natural cooling path without starting the humidifying function is adopted, and when the concentration of any outdoor pollutant is smaller than a corresponding set value, the outdoor air dry bulb temperature is smaller than or equal to a set return air temperature, and the outdoor air dew point temperature is smaller than the minimum limit of the data center machine room dew point temperature, the full air side natural cooling path with the humidifying function is adopted.
Compared with the prior art, the invention can realize the switching among mechanical cooling, full wind side natural cooling, partial water side natural cooling and full water side natural cooling by adjusting each valve according to outdoor weather conditions and pollutant conditions, can effectively avoid the pollutant risk problem of the wind side economizer, and has more excellent water saving performance compared with the single water side economizer, thereby improving the energy saving performance, the water saving performance and the climate adaptability of the refrigerating system. In addition, the humidifying function in the invention adopts an ultrasonic humidifier, the power of the ultrasonic humidifier is about 7.3 percent of that of the steam humidifier, the humidifying energy consumption can be greatly reduced, and the availability potential of the wind side economizer is improved.
Drawings
FIG. 1 is a system block diagram of a data center wind-water economizer of the present invention in combination with a refrigeration system;
FIG. 2 is a schematic flow path diagram of a data center wind-water economizer of the present invention employing a mechanical cooling path in conjunction with a refrigeration system;
FIG. 3 is a schematic diagram of the flow path of the data center wind-water economizer of the present invention in combination with a refrigeration system employing a partial water side natural cooling path for refrigeration;
FIG. 4 is a schematic diagram of the flow path of the data center wind-water economizer of the present invention in combination with a refrigeration system employing a full water side natural cooling path for refrigeration;
FIG. 5 is a schematic flow path diagram of a data center wind-water economizer of the present invention in combination with a refrigeration system employing a full wind side natural cooling path for refrigeration.
Reference numerals illustrate: the cooling tower 1, the water chilling unit 2, the condenser 3, the evaporator 4, the heat exchanger 5, the first bypass electric regulating valve 6, the first inlet electric regulating valve 7, the second bypass electric valve 8, the second inlet electric valve 9, the third inlet electric valve 10, the third bypass electric valve 11, the fourth inlet electric valve 12, the fourth bypass electric valve 13, the cooling water pump 14, the chilled water pump 15, the cooling coil 16, the air conditioning unit 17, the primary filter 8, the middle-effect filter 19, the high-efficiency filter 20, the filter assembly 21, the preheater 22, the first electric air volume regulating valve 23, the second electric air volume regulating valve 24, the third electric air volume regulating valve 25, the overhead layer 26, the data center machine room 27, the air exhaust section 28, the return air section 29, the fresh air section 30, the mixing section 31 and the air supply section 32.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Also, unless the context clearly indicates otherwise, singular forms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "comprises," "comprising," or the like are intended to cover a feature, integer, step, operation, element, and/or component recited as being present in the element or article that "comprises" or "comprising" does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. "up", "down", "left", "right" and the like are used only to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.
As shown in fig. 1, the present solution provides a data center wind-water economizer combined refrigeration system, including a data center machine room 27 and an air conditioning unit 17, where the air conditioning unit 17 includes a variable frequency fan and an ultrasonic humidifier, and further includes a water side economizer and a wind side economizer, both of which are in communication with the air conditioning unit 17, the water side economizer includes a water side valve assembly, and the water side economizer can form a mechanical cooling path (as shown in fig. 2), a partial water side natural cooling path (as shown in fig. 3) and a full water side natural cooling path (as shown in fig. 4) by adjusting the water side valve assembly, the wind side economizer includes a wind side valve assembly, and the wind side economizer can form a full wind side natural cooling path (as shown in fig. 5) by adjusting the wind side valve assembly.
The working principle of the invention is as follows: the refrigerating system has various refrigerating modes, when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value or the outdoor air dry bulb temperature is greater than or equal to a set return air temperature, a certain risk exists when outdoor air refrigeration is introduced, so that a water side economizer is adopted for refrigerating, the refrigerating modes comprise a mechanical cooling path, a partial water side natural cooling path or a full water side natural cooling path for cooling the data center machine room 27 through the air conditioning unit 17, switching of different cooling paths can be realized through adjustment of a water side valve assembly, therefore, different cooling paths can be selected according to the outdoor air temperature condition, the energy consumption is reduced on the basis of ensuring the use safety, and when the concentration of any outdoor pollutant is less than the corresponding set value and the outdoor air dry bulb temperature is less than or equal to the set return air temperature, the full air side natural cooling path is adopted for cooling the data center machine room 27 through the air conditioning unit 17, so that the energy consumption and the water consumption are further reduced on the basis of ensuring the use safety, and the energy saving performance, the water saving performance and the climate adaptability of the refrigerating system are further improved.
Therefore, the scheme realizes the switching among mechanical refrigeration, full wind side natural cooling, partial water side natural cooling and full water side natural cooling according to outdoor weather conditions and pollutant conditions, can effectively avoid the pollutant risk problem of the wind side economizer, and has more excellent water saving performance compared with the single water side economizer, thereby improving the energy conservation, water conservation and climate adaptability of the economizer.
In this embodiment, the water side economizer includes a cooling tower 1, a water chiller 2 and a heat exchanger 5, the cooling tower 1 is an open cooling tower 1, the heat exchanger 5 is a plate heat exchanger 5, the heat exchanger 5 includes a cooling water side and a chilled water side, the water chiller 2 includes a condenser 3 and an evaporator 4, the cooling tower 1, the cooling water side of the heat exchanger 5 and the condenser 3 are located on a cooling water circuit, the chilled water side of the heat exchanger 5 and the evaporator 4 are located on the chilled water circuit, an outlet end of the cooling tower 1 is connected with an inlet end of the cooling water side of the heat exchanger 5, and an outlet end of the cooling water side of the heat exchanger 5 is connected with an inlet end of the condenser 3, an outlet end of the condenser 3 is connected with an inlet end of the cooling tower 1, the water side valve assembly includes a first valve assembly and a second valve assembly, the first valve assembly is disposed at the condenser 3, such that the cooling water of the cooling tower 1 does not pass through the condenser 3, partially passes through the condenser 3 or completely passes through the condenser 3 by adjusting the first valve assembly; the second valve assembly is positioned on the cooling water side of the heat exchanger 5 so that the cooling water of the cooling tower 1 does not pass through the heat exchanger 5 or passes through the heat exchanger 5 completely through the adjustment of the second valve assembly;
The inlet end of the chilled water side of the heat exchanger 5 is connected with the outlet end of the cooling coil 16 of the air conditioning unit 17, the outlet end of the chilled water side of the heat exchanger 5 is connected with the inlet end of the evaporator 4, the outlet end of the evaporator 4 is connected with the inlet end of the cooling disc of the air conditioning unit 17, the water side valve assembly further comprises a third valve assembly and a fourth valve assembly, and the third valve assembly is arranged at the evaporator 4 so that chilled water passes through the evaporator 4 or does not pass through the evaporator 4 through the adjustment of the third valve assembly; the fourth valve assembly is located on the chilled water side of the heat exchanger 5 such that chilled water passes through the heat exchanger 5, or does not pass through the heat exchanger 5, by adjustment of the fourth valve assembly.
In this way, when the mechanical cooling path is adopted to cool the data center room 27 through the air conditioning unit 17, as shown in fig. 2, on the cooling water side, the first valve component and the second valve component are adjusted, so that the cooling water flows out from the outlet end of the cooling tower 1, does not pass through the heat exchanger 5, completely passes through the condenser 3, and returns to the inlet end of the cooling tower 1; on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water flows from the outlet end of the evaporator 4 through the cooling coil 16 of the air conditioning unit 17 and back to the inlet end of the evaporator 4 without passing through the heat exchanger 5; when the data center machine room 27 is cooled by the air conditioning unit 17 through the natural cooling path on the water side, as shown in fig. 3, the first valve component and the second valve component are adjusted on the cooling water side, so that the cooling water flows out from the outlet end of the cooling tower 1 and completely passes through the heat exchanger 5 and partially or completely passes through the condenser 3 and returns to the inlet end of the cooling tower 1; on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water flows from the outlet end of the evaporator 4 through the cooling coil 16 of the air conditioning unit 17 and then completely through the heat exchanger 5 back to the inlet end of the evaporator 4; when the data center machine room 27 is cooled by the air conditioning unit 17 through the full water side natural cooling path, as shown in fig. 4, the first valve component and the second valve component are adjusted on the cooling water side, so that the cooling water flows out from the outlet end of the cooling tower 1, completely passes through the heat exchanger 5 and returns to the inlet end of the cooling tower 1 without passing through the condenser 3; on the chilled water side, the third and fourth valve assemblies are adjusted so that chilled water passes through the cooling coil 16 of the air conditioning unit 17 and then completely through the heat exchanger 5 and back to the cooling coil 16 of the air conditioning unit 17. Thus, by adjusting the first valve assembly, the second valve assembly, the third valve assembly and the fourth valve assembly, switching of the mechanical cooling path, the partial water side natural cooling path and the full water side natural cooling path can be achieved.
In this embodiment, a first bypass pipe is further disposed between the inlet end and the outlet end of the condenser 3, the first valve assembly includes a first inlet electric adjustment valve 7 and a first bypass electric adjustment valve 6, the first inlet electric adjustment valve 7 is disposed at the inlet end of the condenser 3, and the first bypass electric adjustment valve 6 is disposed on the first bypass pipe;
a second bypass pipe is further arranged between the inlet end and the outlet end of the cooling water side of the heat exchanger 5, the second valve assembly comprises a second inlet electric valve 9 and a second bypass electric valve 8, the second inlet electric valve 9 is arranged at the inlet end of the cooling water side of the heat exchanger 5, and the second bypass electric valve 8 is arranged on the second bypass pipe;
a third bypass pipe is further arranged between the inlet end and the outlet end of the evaporator 4, the third valve assembly comprises a third inlet electric valve 10 and a third bypass electric valve 11, the third inlet electric valve 10 is arranged at the inlet end of the evaporator 4, and the third bypass electric valve 11 is arranged on the third bypass pipe;
a fourth bypass pipe is further arranged between the inlet end and the outlet end of the chilled water side of the heat exchanger 5, the fourth valve component comprises a fourth inlet electric valve 12 and a fourth bypass electric valve 13, the fourth inlet electric valve 12 is arranged at the inlet end of the chilled water side of the heat exchanger 5, and the fourth bypass electric valve 13 is arranged on the fourth bypass pipe.
In this way, when the mechanical cooling path is adopted to cool the data center machine room 27 through the air conditioning unit 17, as shown in fig. 2, on the cooling water side, the first inlet electric regulating valve 7 and the second bypass electric valve 8 are opened, the first bypass electric regulating valve 6 and the second inlet electric valve 9 are closed, so that the cooling water flows out from the outlet end of the cooling tower 1 and then returns to the inlet end of the cooling tower 1 after passing through the second bypass electric valve 8, the first inlet electric regulating valve 7 and the condenser 3 in sequence; on the chilled water side, a third inlet electric valve 10 and a fourth bypass electric valve 13 are opened, and a third bypass electric valve 11 and a fourth inlet electric valve 12 are closed, so that chilled water sequentially passes through a cooling coil 16, the fourth bypass electric valve 13 and the third inlet electric valve 10 of an air conditioning unit 17 from the outlet end of the evaporator 4 and returns to the evaporator 4; when the data center machine room 27 is cooled by adopting a part of water side natural cooling paths through the air conditioning unit 17, as shown in fig. 3, on the cooling water side, the first inlet electric regulating valve 7, the first bypass electric regulating valve 6 and the second inlet electric valve 9 are opened, and the second bypass electric valve 8 is closed, so that cooling water flows out from the outlet end of the cooling tower 1 and then sequentially flows through the second inlet electric valve 9 and the heat exchanger 5 and then is divided into two paths, wherein one path returns to the inlet end of the cooling tower 1 after passing through the first inlet electric regulating valve 7 and the condenser 3, and the other path returns to the inlet end of the cooling tower 1 after passing through the first bypass electric regulating valve 6, and the opening degree of the first inlet electric regulating valve 7 and the first bypass electric regulating valve 6 is regulated to regulate the cooling water quantity passing through the condenser 3; on the chilled water side, a third inlet electric valve 10 and a fourth inlet electric valve 12 are opened, a third bypass electric valve 11 and a fourth bypass electric valve 13 are closed, so that chilled water sequentially passes through a cooling coil 16, a fourth inlet electric valve 12, a heat exchanger 5 and the third inlet electric valve 10 of an air conditioning unit 17 from the outlet end of the evaporator 4 and returns to the evaporator 4; when the complete water side natural cooling path is adopted to cool the data center machine room 27 through the air conditioning unit 17, as shown in fig. 4, on the cooling water side, the first bypass electric regulating valve 6 and the second inlet electric valve 9 are opened, the first inlet electric regulating valve 7 and the second bypass electric valve 8 are closed, so that cooling water flows out from the outlet end of the cooling tower 1 and then sequentially passes through the second inlet electric valve 9, the heat exchanger 5 and the first bypass electric regulating valve 6 and returns to the inlet end of the cooling tower 1; on the chilled water side, the third bypass electric valve 11 and the fourth inlet electric valve 12 are opened, and the third inlet electric valve 10 and the fourth bypass electric valve 13 are closed, so that chilled water passes through the cooling coil 16 of the air conditioning unit 17 and then sequentially passes through the fourth inlet electric valve 12, the heat exchanger 5 and the third bypass electric valve 11 and then returns to the evaporator 4.
In this embodiment, the water side economizer further comprises a cooling water pump 14 and a chilled water pump 15, the cooling water pump 14 is disposed between the outlet end of the cooling tower 1 and the inlet end of the chilled water side of the heat exchanger 5, and the chilled water pump 15 is disposed between the inlet end of the chilled water side of the heat exchanger 5 and the outlet end of the cooling coil 16 of the air conditioning unit 17.
Thus, the variable frequency cooling water pump 14 is used as the cooling water pump 14, and the variable frequency cooling water pump 15 is used as the cooling water pump 15.
In this embodiment, the air side economizer includes an exhaust section 28, a return air section 29, a fresh air section 30, a mixing section 31 and an air supply section 32, the mixing section 31 is communicated with an air inlet of the air conditioning unit 17, the air supply section 32 is respectively connected with an air outlet of the air conditioning unit 17 and an overhead layer 26 of the data center room 27, the return air inlet of the data center room 27 is respectively communicated with the exhaust section 28 and the return air section 29, a first electric air volume regulating valve 23 is arranged on the fresh air section 30, a second electric air volume regulating valve 24 is arranged on the exhaust section 28, a third electric air volume regulating valve 25 is arranged on the return air section 29, and the mixing section 31 is used for mixing the air of the return air section 29 and the fresh air section 30 and then delivering the mixed air to the air conditioning unit 17.
Thus, when the air-side economizer cools the data center room 27 through the air conditioning unit 17, as shown in fig. 5, the water-side valve assembly is completely closed, and the first electric air volume adjusting valve 23, the second electric air volume adjusting valve 24 and the third electric air volume adjusting valve 25 are simultaneously opened and adjusted, so that the fresh air of the fresh air section 30 and the return air of the return air section 29 are mixed and then sent to the overhead floor 26 of the data center room 27 after being subjected to or without humidification treatment in the air conditioning unit 17.
In this embodiment, the fresh air section 30 is further provided with a filter assembly 21 and a preheater 22 in sequence, the preheater 22 is an electric preheater 22, and the filter assembly 21 includes a primary filter 18, a middle-efficiency filter 19 and a high-efficiency filter 20 which are sequentially arranged.
In this way, the filter assembly 21 may change the combination of the primary filter 18, the middle filter 19 and the high efficiency filter 20 according to the outdoor contaminant condition, thereby further ensuring the cleanliness of the outdoor air introduced into the refrigerating system, and the preheater 22 may preheat the introduced outdoor air, thereby preventing the entrance into the "fog zone".
The scheme also provides a working method of the data center wind-water economizer combined refrigerating system, when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value or the outdoor air dry bulb temperature is greater than or equal to a set return air temperature, a mechanical cooling path, a partial water side natural cooling path or a full water side natural cooling path is adopted to cool the data center machine room 27 through the air conditioning unit 17, and when the concentration of any outdoor pollutant is less than the corresponding set value and the outdoor air dry bulb temperature is less than or equal to the set return air temperature, the full wind side natural cooling path is adopted to cool the data center machine room 27 through the air conditioning unit 17.
In this embodiment, the method for cooling the data center room 27 by the air conditioning unit 17 using the mechanical cooling path is as shown in fig. 2: on the cooling water side, the first valve assembly and the second valve assembly are adjusted so that the cooling water flows out from the outlet end of the cooling tower 1, does not pass through the heat exchanger 5 and completely passes through the condenser 3 and returns to the inlet end of the cooling tower 1; on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water flows from the outlet end of the evaporator 4 through the cooling coil 16 of the air conditioning unit 17 and back to the inlet end of the evaporator 4 without passing through the heat exchanger 5;
the method for cooling the data center machine room 27 by the air conditioning unit 17 through the partial water side natural cooling path comprises the following steps: as shown in fig. 3, on the cooling water side, the first valve assembly and the second valve assembly are adjusted so that the cooling water flows out from the outlet end of the cooling tower 1, passes completely through the heat exchanger 5 and returns to the inlet end of the cooling tower 1 after passing partially or completely through the condenser 3; on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water flows from the outlet end of the evaporator 4 through the cooling coil 16 of the air conditioning unit 17 and then completely through the heat exchanger 5 back to the inlet end of the evaporator 4;
The method for cooling the data center machine room 27 by the air conditioning unit 17 through the complete water side natural cooling path comprises the following steps: as shown in fig. 4, on the cooling water side, the first valve assembly and the second valve assembly are adjusted so that the cooling water flows out from the outlet end of the cooling tower 1, completely passes through the heat exchanger 5 and returns to the inlet end of the cooling tower 1 without passing through the condenser 3; on the chilled water side, the third and fourth valve assemblies are adjusted so that chilled water passes through the cooling coil 16 of the air conditioning unit 17 and then completely through the heat exchanger 5 and back to the cooling coil 16 of the air conditioning unit 17.
In the present embodiment, the method for cooling the data center room 27 by the air conditioning unit 17 using the mechanical cooling path is as follows: as shown in fig. 2, on the cooling water side, a first inlet electric regulating valve 7 and a second bypass electric valve 8 are opened, and the first bypass electric regulating valve 6 and the second inlet electric valve 9 are closed, so that cooling water flows out from the outlet end of the cooling tower 1 and returns to the inlet end of the cooling tower 1 after passing through the second bypass electric valve 8, the first inlet electric regulating valve 7 and the condenser 3 in sequence; on the chilled water side, a third inlet electric valve 10 and a fourth bypass electric valve 13 are opened, and a third bypass electric valve 11 and a fourth inlet electric valve 12 are closed, so that chilled water sequentially passes through a cooling coil 16, the fourth bypass electric valve 13 and the third inlet electric valve 10 of an air conditioning unit 17 from the outlet end of the evaporator 4 and returns to the evaporator 4;
The method for cooling the data center machine room 27 by the air conditioning unit 17 through the partial water side natural cooling path comprises the following steps: as shown in fig. 3, on the cooling water side, a first inlet electric regulating valve 7, a first bypass electric regulating valve 6 and a second inlet electric valve 9 are opened, and a second bypass electric valve 8 is closed, so that cooling water flows out from the outlet end of the cooling tower 1 and then sequentially passes through the second inlet electric valve 9 and the heat exchanger 5 to be divided into two paths, wherein one path returns to the inlet end of the cooling tower 1 after passing through the first inlet electric regulating valve 7 and the condenser 3, and the other path returns to the inlet end of the cooling tower 1 after passing through the first bypass electric regulating valve 6, and the opening degree of the first inlet electric regulating valve 7 and the first bypass electric regulating valve 6 is regulated to regulate the cooling water quantity passing through the condenser 3; on the chilled water side, a third inlet electric valve 10 and a fourth inlet electric valve 12 are opened, a third bypass electric valve 11 and a fourth bypass electric valve 13 are closed, so that chilled water sequentially passes through a cooling coil 16, a fourth inlet electric valve 12, a heat exchanger 5 and the third inlet electric valve 10 of an air conditioning unit 17 from the outlet end of the evaporator 4 and returns to the evaporator 4;
the method for cooling the data center machine room 27 by the air conditioning unit 17 through the complete water side natural cooling path comprises the following steps: as shown in fig. 4, on the cooling water side, a first bypass electric regulating valve 6 and a second inlet electric valve 9 are opened, and the first inlet electric regulating valve 7 and the second bypass electric valve 8 are closed, so that the cooling water flows out from the outlet end of the cooling tower 1 and returns to the inlet end of the cooling tower 1 after passing through the second inlet electric valve 9, the heat exchanger 5 and the first bypass electric regulating valve 6 in sequence; on the chilled water side, the third bypass electric valve 11 and the fourth inlet electric valve 12 are opened, and the third inlet electric valve 10 and the fourth bypass electric valve 13 are closed, so that chilled water passes through the cooling coil 16 of the air conditioning unit 17 and then sequentially passes through the fourth inlet electric valve 12, the heat exchanger 5 and the third bypass electric valve 11 and then returns to the evaporator 4.
In this embodiment, the method for cooling the data center room 27 by the air conditioning unit 17 using the full wind side natural cooling path is as follows: as shown in fig. 5, the water side valve assembly is completely closed, and the first electric air quantity adjusting valve 23, the second electric air quantity adjusting valve 24 and the third electric air quantity adjusting valve 25 are simultaneously opened and adjusted, so that the fresh air section 30 and the return air of the fresh air and return air section 29 are mixed and then sent to the overhead layer 26 of the data center machine room 27 after being humidified or not in the air conditioning unit 17.
In this embodiment, the outdoor contaminants include PM 2.5 、PM 10 、SO 2 、H 2 S and Cl 2 Specifically, when the concentration of any contaminant outside the room is equal to or higher than the corresponding set value (i.e., when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 When more than one is not satisfied), and the outdoor air wet bulb temperature is more than the chilled water return temperature-the cooling tower 1 cold width-the heat exchanger 5 heat exchange temperature difference; or the concentration of any contaminant outside the room is smaller than the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 All satisfying) and the outdoor air dry bulb temperature is greater than the set return air temperature, the outdoor air wet bulb temperature is greater than the chilled water return water temperature, the cooling tower 1 is cooled by the air conditioning unit 17 through the mechanical cooling path when the heat exchange temperature difference of the heat exchanger 5 is smaller than the set return air temperature, at this time, on the cooling water side, the first inlet electric regulating valve 7, the second bypass electric valve 8, the third inlet electric valve 10 and the fourth bypass electric valve 13 are opened, and the first bypass electric regulating valve 6, the second inlet electric valve 9, the third bypass electric valve 11 and the fourth inlet electric valve 12 are closed, so that the cooling water flows from the outlet of the cooling tower 1 The chilled water flows out from the outlet end of the evaporator 4 and then returns to the inlet end of the cooling tower 1 through the cooling water pump 14, the second bypass electric valve 8, the first inlet electric regulating valve 7 and the condenser 3, and then returns to the evaporator 4 through the cooling coil 16 of the air conditioning unit 17, the chilled water pump 15, the fourth bypass electric valve 13 and the third inlet electric valve 10, at this time, all return air from the data center machine room 27 is cooled by the air conditioning unit 17 and then sent to the overhead layer 26, wherein heat is transferred to the outdoor air through the air conditioning unit 17, the water chilling unit 2 and the cooling tower 1 in sequence, and mechanical cooling is achieved, as shown in fig. 2.
When the concentration of any pollutant outside the room is greater than or equal to the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 When one or more than one is not satisfied) and the chilled water supply temperature-the cooling tower 1 cold width-the heat exchanger 5 heat exchange temperature difference < ", when the outdoor air wet bulb temperature is less than or equal to the chilled water backwater temperature, namely the heat exchange temperature difference of the cooling tower 1 cold-plate heat exchanger 5; or the concentration of any contaminant outside the room is smaller than the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 All meeting), and the outdoor air dry bulb temperature is more than the set return air temperature, the chilled water supply temperature is less than the outdoor air wet bulb temperature which is less than or equal to the chilled water return water temperature which is less than the chilled water return temperature which is less than the outdoor air wet bulb temperature which is less than the chilled water return temperature which is less than the plate heat exchanger 5 of the cooling tower 1, the data center machine room 27 is cooled by adopting a part of water side natural cooling path through the air conditioning unit 17, at the moment, the first inlet electric regulating valve 7, the first side-actuated regulating valve 6, the second inlet electric valve 9, the third inlet electric valve 10 and the fourth inlet electric valve 12 are opened, the second bypass electric valve 8, the third bypass electric valve 11 and the fourth side-actuated valve 13 are closed, so that the cooling water flows out from the outlet end of the cooling tower 1 and then sequentially passes through the cooling water pump 14 and the second inlet electric valve 13The electric valve 9 and the heat exchanger 5 are divided into two paths, wherein one path returns to the inlet end of the cooling tower 1 after passing through the first electric inlet regulating valve 7 and the condenser 3, the other path returns to the inlet end of the cooling tower 1 after passing through the first side-pass electric regulating valve 6, the opening degree of the first electric inlet regulating valve 7 and the opening degree of the first side-pass electric regulating valve 6 are regulated to regulate the cooling water quantity passing through the condenser 3, the phenomenon that the cooling water cannot be started due to the too low condensing pressure of the water chiller 2 can be avoided through the opening degree of the regulating valve, the chilled water sequentially passes through the cooling coil 16 of the air conditioner 17, the chilled water pump 15, the fourth electric inlet valve 12, the heat exchanger 5 and the third electric inlet valve 10 after passing through the outlet end of the evaporator 4, and then returns to the evaporator 4, at the moment, all return air from the data center machine room 27 is cooled by the air conditioner 17 and then is transmitted to the outdoor air through the air conditioner 17, and the air of the data center 27 is partially cooled naturally, as shown in fig. 3.
When the concentration of any pollutant outside the room is greater than or equal to the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 When more than one is not satisfied) and the outdoor air wet bulb temperature is less than or equal to the chilled water supply temperature-the cooling tower 1 cold-plate heat exchanger 5 heat exchange temperature difference; or the concentration of any contaminant outside the room is smaller than the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 All meeting) and the outdoor air dry bulb temperature is more than the set return air temperature, the outdoor air wet bulb temperature is less than or equal to the chilled water supply temperature, the cooling tower 1 is used for cooling the data center machine room 27 by adopting a full water side natural cooling path through the air conditioning unit 17, and at the moment, the first bypass electric regulating valve 6, the second inlet electric valve 9, the third bypass electric valve 11 and the third bypass electric valve are openedA fourth inlet electric valve 12, which closes the first inlet electric regulating valve 7, the second bypass electric valve 8, the third inlet electric valve 10 and the fourth bypass electric valve 13, so that the cooling water flows out from the outlet end of the cooling tower 1 and returns to the inlet end of the cooling tower 1 after passing through the cooling water pump 14, the second inlet electric valve 9, the heat exchanger 5 and the first bypass electric regulating valve 6 in sequence; chilled water passes through the cooling coil 16 of the air conditioning unit 17, then sequentially passes through the chilled water pump 15, the fourth inlet electric valve 12, the heat exchanger 5 and the third bypass electric valve 11, and then returns to the evaporator 4, at this time, all return air from the data center machine room 27 is cooled by the air conditioning unit 17 and then is sent to the overhead layer 26, wherein heat is sequentially transferred to the outdoor air through the air conditioning unit 17, the heat exchanger 5 and the cooling tower 1, and the full water side natural cooling is realized, as shown in fig. 4.
When the concentration of any pollutant outside the room is smaller than the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 When all the air conditions are met), and the outdoor air dry bulb temperature is less than or equal to the set return air temperature, and the outdoor air dew point temperature is more than or equal to the minimum limit of the dew point temperature of the data center machine room 27, a full air side natural cooling path without starting a humidifying function is adopted, at the moment, a water side valve assembly is completely closed, and a first electric air quantity regulating valve 23, a second electric air quantity regulating valve 24 and a third electric air quantity regulating valve 25 are simultaneously opened and regulated, so that return air of a fresh air section 30 and a fresh air and return air section 29 is mixed and then is sent to an overhead layer 26 of the data center machine room 27 after being not humidified in an air conditioning unit 17; when the concentration of any pollutant outside the room is smaller than the corresponding set value (i.e. when PM 2.5 The concentration is less than 70 mu g/m 3 、PM 10 The concentration is less than 70 mu g/m 3 、SO 2 Concentration is less than 26 mu g/m 3 、H 2 S concentration < 4. Mu.g/m 3 、Cl 2 Concentration < 3. Mu.g/m 3 All meeting) and the outdoor air dry bulb temperature is less than or equal to the set return air temperature, the outdoor air dew point temperature is less than the minimum limit of the dew point temperature of the data center machine room 27, and the full air side natural with the humidifying function is adoptedThe cooling path, at this time, completely closes the water side valve assembly, opens and adjusts the first electric air volume adjusting valve 23, the second electric air volume adjusting valve 24 and the third electric air volume adjusting valve 25, and simultaneously opens the ultrasonic humidifier, so that after the fresh air section 30 and the return air of the fresh air and return air section 29 are mixed, the mixture is sent to the overhead layer 26 of the data center machine room 27 after being humidified in the air conditioning unit 17, and fully exchanges heat with indoor air, and thus, the mixture is reciprocated to realize the natural cooling (humidification) of the complete air side, as shown in fig. 5.
Compared with the prior art, the invention can realize the switching among mechanical cooling, full wind side natural cooling, partial water side natural cooling and full water side natural cooling by adjusting each valve according to outdoor weather conditions and pollutant conditions, can effectively avoid the pollutant risk problem of the wind side economizer, and has more excellent water saving performance compared with the single water side economizer, thereby improving the energy saving performance, the water saving performance and the climate adaptability of the refrigerating system. In addition, the humidifying function in the invention adopts an ultrasonic humidifier, the power of the ultrasonic humidifier is about 7.3 percent of that of the steam humidifier, the humidifying energy consumption can be greatly reduced, and the availability potential of the wind side economizer is improved.
Finally, it should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the technical solution, and those skilled in the art should understand that modifications and equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the present invention, and all such modifications and equivalents are included in the scope of the claims.

Claims (10)

1. The utility model provides a data center wind-water economizer combines refrigerating system, includes data center computer lab and air conditioning unit, its characterized in that still includes water side economizer and wind side economizer, water side economizer with wind side economizer all with air conditioning unit intercommunication, water side economizer includes water side valve subassembly, just water side economizer through right water side valve subassembly's adjustment can form mechanical cooling route, partial water side natural cooling route and complete water side natural cooling route, wind side economizer includes wind side valve subassembly, just wind side economizer through right wind side valve subassembly's adjustment can form complete wind side natural cooling route.
2. The data center wind water economizer combination refrigeration system of claim 1 wherein the water side economizer comprises a cooling tower, a chiller and a heat exchanger, the heat exchanger comprising a chilled water side and a chilled water side, the chiller comprising a condenser and an evaporator, the cooling tower, the chilled water side of the heat exchanger and the condenser being located on a chilled water circuit, the chilled water side of the heat exchanger and the evaporator being located on a chilled water circuit, an outlet end of the cooling tower being connected to an inlet end of the chilled water side of the heat exchanger, and an outlet end of the chilled water side of the heat exchanger being connected to an inlet end of the condenser, an outlet end of the condenser being connected to an inlet end of the cooling tower, the water side valve assembly comprising a first valve assembly and a second valve assembly, the first valve assembly being located at the condenser such that chilled water of the cooling tower does not pass through the condenser, partially passes through the condenser, or completely passes through the condenser by adjustment of the first valve assembly; the second valve assembly is positioned on the cooling water side of the heat exchanger, so that the cooling water of the cooling tower does not pass through the heat exchanger or completely passes through the heat exchanger through the adjustment of the second valve assembly;
The inlet end of the chilled water side of the heat exchanger is connected with the outlet end of the cooling coil of the air conditioning unit, the outlet end of the chilled water side of the heat exchanger is connected with the inlet end of the evaporator, the outlet end of the evaporator is connected with the inlet end of the cooling disc of the air conditioning unit, the water side valve assembly further comprises a third valve assembly and a fourth valve assembly, and the third valve assembly is arranged at the evaporator so that chilled water passes through the evaporator or does not pass through the evaporator through the adjustment of the third valve assembly; the fourth valve assembly is positioned on the chilled water side of the heat exchanger such that chilled water passes through the heat exchanger, or does not pass through the heat exchanger, by adjustment of the fourth valve assembly.
3. The data center wind-water economizer combination refrigeration system of claim 2 wherein a first bypass line is also provided between the inlet and outlet ends of the condenser, the first valve assembly including a first inlet electrically actuated valve and a first bypass electrically actuated valve, the first inlet electrically actuated valve being provided at the inlet end of the condenser, the first bypass electrically actuated valve being provided on the first bypass line;
A second bypass pipe is further arranged between the inlet end and the outlet end of the cooling water side of the heat exchanger, the second valve assembly comprises a second inlet electric valve and a second bypass electric valve, the second inlet electric valve is arranged at the inlet end of the cooling water side of the heat exchanger, and the second bypass electric valve is arranged on the second bypass pipe;
a third bypass pipe is further arranged between the inlet end and the outlet end of the evaporator, the third valve assembly comprises a third inlet electric valve and a third bypass electric valve, the third inlet electric valve is arranged at the inlet end of the evaporator, and the third bypass electric valve is arranged on the third bypass pipe;
a fourth bypass pipe is further arranged between the inlet end and the outlet end of the chilled water side of the heat exchanger, the fourth valve assembly comprises a fourth inlet electric valve and a fourth bypass electric valve, the fourth inlet electric valve is arranged at the inlet end of the chilled water side of the heat exchanger, and the fourth bypass electric valve is arranged on the fourth bypass pipe.
4. The data center wind-water economizer combination refrigeration system of claim 2 wherein the water side economizer further comprises a cooling water pump and a chilled water pump, the cooling water pump being disposed between the outlet end of the cooling tower and the inlet end of the heat exchanger cooling water side, the chilled water pump being disposed between the inlet end of the heat exchanger cooling water side and the cooling coil outlet end of the air conditioning unit.
5. The data center wind-water economizer combines refrigerating system according to claim 1, wherein the wind-side economizer comprises an exhaust section, a return air section, a fresh air section, a mixing section and an air supply section, the mixing section is communicated with an air inlet of the air conditioning unit, the air supply section is respectively connected with an air outlet of the air conditioning unit and an overhead layer of the data center machine room, the return air inlet of the data center machine room is respectively communicated with the exhaust section and the return air section, a first electric air volume regulating valve is arranged on the fresh air section, a second electric air volume regulating valve is arranged on the exhaust section, a third electric air volume regulating valve is arranged on the return air section, and the mixing section is used for mixing the air of the return air section and the fresh air section and then sending the mixed air into the air conditioning unit.
6. The working method of the data center wind-water economizer combined refrigerating system is characterized in that the data center wind-water economizer combined refrigerating system is adopted, when the concentration of any outdoor pollutant is larger than or equal to a corresponding set value or the outdoor air dry bulb temperature is larger than or equal to a set return air temperature, a mechanical cooling path, a partial water side natural cooling path or a full water side natural cooling path are adopted to cool a data center machine room through an air conditioning unit, and when the concentration of any outdoor pollutant is smaller than the corresponding set value and the outdoor air dry bulb temperature is smaller than or equal to the set return air temperature, the full wind side natural cooling path is adopted to cool the data center machine room through the air conditioning unit.
7. The method of claim 6, wherein the water side economizer comprises a cooling tower, a chiller and a heat exchanger, the heat exchanger comprises a cooling water side and a chilled water side, the chiller comprises a condenser and an evaporator, the cooling water side of the cooling tower, the heat exchanger and the condenser are positioned on a cooling water circuit, the chilled water side of the heat exchanger and the evaporator are positioned on a chilled water circuit, an outlet end of the cooling tower is connected to an inlet end of the cooling water side of the heat exchanger, and an outlet end of the cooling water side of the heat exchanger is connected to an inlet end of the condenser, an outlet end of the condenser is connected to an inlet end of the cooling tower, the water side valve assembly comprises a first valve assembly and a second valve assembly, the first valve assembly is positioned at the condenser such that cooling water of the cooling tower does not pass through the condenser, partially passes through the condenser, or completely passes through the condenser by adjustment of the first valve assembly; the second valve assembly is positioned on the cooling water side of the heat exchanger, so that the cooling water of the cooling tower does not pass through the heat exchanger or completely passes through the heat exchanger through the adjustment of the second valve assembly;
The inlet end of the chilled water side of the heat exchanger is connected with the outlet end of the cooling coil of the air conditioning unit, the outlet end of the chilled water side of the heat exchanger is connected with the inlet end of the evaporator, the outlet end of the evaporator is connected with the inlet end of the cooling disc of the air conditioning unit, the water side valve assembly further comprises a third valve assembly and a fourth valve assembly, and the third valve assembly is arranged at the evaporator so that chilled water passes through the evaporator or does not pass through the evaporator through the adjustment of the third valve assembly; the fourth valve assembly is positioned on the chilled water side of the heat exchanger, so that chilled water passes through the heat exchanger or does not pass through the heat exchanger by adjusting the fourth valve assembly;
the method for cooling the data center machine room by adopting the mechanical cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water flows out from an outlet end of the cooling tower, does not pass through the heat exchanger and completely passes through the condenser and returns to an inlet end of the cooling tower; on the chilled water side, adjusting a third valve assembly and a fourth valve assembly so that chilled water flows from the outlet end of the evaporator through the cooling coil of the air conditioning unit and then returns to the inlet end of the evaporator without passing through the heat exchanger;
The method for cooling the data center machine room by adopting the partial water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water completely passes through the heat exchanger after flowing out from the outlet end of the cooling tower and returns to the inlet end of the cooling tower after partially or completely passing through the condenser; on the chilled water side, regulating a third valve assembly and a fourth valve assembly so that chilled water flows through a cooling coil of the air conditioning unit from the outlet end of the evaporator and then completely passes through the heat exchanger to return to the inlet end of the evaporator;
the method for cooling the data center machine room by adopting the complete water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, adjusting a first valve component and a second valve component so that cooling water completely passes through the heat exchanger after flowing out from the outlet end of the cooling tower and returns to the inlet end of the cooling tower without passing through the condenser; and on the chilled water side, the third valve assembly and the fourth valve assembly are adjusted so that chilled water passes through the cooling coil of the air conditioning unit and then completely passes through the heat exchanger and returns to the cooling coil of the air conditioning unit.
8. The data center wind-water economizer combination refrigeration system of claim 7 wherein a first bypass line is further provided between the inlet and outlet ends of the condenser, the first valve assembly including a first inlet electrically actuated valve and a first bypass electrically actuated valve, the first inlet electrically actuated valve being provided at the inlet end of the condenser, the first bypass electrically actuated valve being provided on the first bypass line;
a second bypass pipe is further arranged between the inlet end and the outlet end of the cooling water side of the heat exchanger, the second valve assembly comprises a second inlet electric valve and a second bypass electric valve, the second inlet electric valve is arranged at the inlet end of the cooling water side of the heat exchanger, and the second bypass electric valve is arranged on the second bypass pipe;
a third bypass pipe is further arranged between the inlet end and the outlet end of the evaporator, the third valve assembly comprises a third inlet electric valve and a third bypass electric valve, the third inlet electric valve is arranged at the inlet end of the evaporator, and the third bypass electric valve is arranged on the third bypass pipe;
a fourth bypass pipe is further arranged between the inlet end and the outlet end of the chilled water side of the heat exchanger, the fourth valve assembly comprises a fourth inlet electric valve and a fourth bypass electric valve, the fourth inlet electric valve is arranged at the inlet end of the chilled water side of the heat exchanger, and the fourth bypass electric valve is arranged on the fourth bypass pipe;
The method for cooling the data center machine room by adopting the mechanical cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first inlet electric regulating valve and a second bypass electric valve are opened, and the first bypass electric regulating valve and the second inlet electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second bypass electric valve, the first inlet electric regulating valve and the condenser and then returns to the inlet end of the cooling tower; on the chilled water side, a third inlet electric valve and a fourth bypass electric valve are opened, and the third bypass electric valve and the fourth inlet electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth bypass electric valve and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator;
the method for cooling the data center machine room by adopting the partial water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first inlet electric regulating valve, a first bypass electric regulating valve and a second inlet electric valve are opened, and the second bypass electric valve is closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second inlet electric valve and the heat exchanger to be divided into two paths, wherein one path returns to the inlet end of the cooling tower after passing through the first inlet electric regulating valve and the condenser, and the other path returns to the inlet end of the cooling tower after passing through the first bypass electric regulating valve, and the opening degree of the first inlet electric regulating valve and the opening degree of the first bypass electric regulating valve are regulated to regulate the cooling water quantity passing through the condenser; on the chilled water side, a third inlet electric valve and a fourth inlet electric valve are opened, and a third bypass electric valve and a fourth bypass electric valve are closed, so that chilled water sequentially passes through a cooling coil pipe, the fourth inlet electric valve, a heat exchanger and the third inlet electric valve of an air conditioning unit from the outlet end of the evaporator and then returns to the evaporator;
The method for cooling the data center machine room by adopting the complete water side natural cooling path through the air conditioning unit comprises the following steps: on the cooling water side, a first bypass electric regulating valve and a second inlet electric valve are opened, and the first inlet electric regulating valve and the second bypass electric valve are closed, so that cooling water flows out from the outlet end of the cooling tower and then sequentially passes through the second inlet electric valve, the heat exchanger and the first bypass electric regulating valve and then returns to the inlet end of the cooling tower; and on the chilled water side, opening a third bypass electric valve and a fourth inlet electric valve, and closing the third inlet electric valve and the fourth bypass electric valve, so that chilled water passes through the cooling coil of the air conditioning unit and then sequentially passes through the fourth inlet electric valve, the heat exchanger and the third bypass electric valve and then returns to the evaporator.
9. The working method of the data center wind-water economizer combined refrigerating system according to claim 8, wherein the wind-side economizer comprises an air exhaust section, a return air section, a fresh air section, a mixing section and an air supply section, the mixing section is communicated with an air inlet of an air conditioning unit, the air supply section is respectively connected with an air outlet of the air conditioning unit and an overhead layer of a data center machine room, the return air inlet of the data center machine room is respectively communicated with the air exhaust section and the return air section, a first electric air volume regulating valve is arranged on the fresh air section, a second electric air volume regulating valve is arranged on the air exhaust section, a third electric air volume regulating valve is arranged on the return air section, and the mixing section is used for mixing wind of the return air section and the fresh air section and then sending the mixed wind into the air conditioning unit;
The method for cooling the data center machine room by adopting the complete wind side natural cooling path through the air conditioning unit comprises the following steps: the water side valve assembly is completely closed, and the first electric air quantity regulating valve, the second electric air quantity regulating valve and the third electric air quantity regulating valve are simultaneously opened and regulated, so that fresh air of the fresh air section and return air of the return air section are mixed and then sent to an overhead layer of a data center machine room after being subjected to or not subjected to humidification treatment in an air conditioning unit.
10. The method of operating a data center wind-water economizer combined refrigeration system of claim 9 wherein the outdoor contaminants include PM 2.5 、PM 10 、SO 2 、H 2 S and Cl 2 The cooling of the data center room by the air conditioning unit through the mechanical cooling path includes: the concentration of any pollutant outside the chamber is larger than or equal to a corresponding set value, and the wet bulb temperature of the outdoor air is larger than the return water temperature of the chilled water, the heat exchange temperature difference between the cooling tower cold width and the heat exchanger; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is more than the set return air temperature, the outdoor air wet bulb temperature is more than the chilled water return water temperature, and the cooling tower cold width-heat exchanger heat exchange temperature difference;
the adoption of the partial water side natural cooling path for cooling the data center machine room through the air conditioning unit comprises the following steps: when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value, and the chilled water supply temperature, the cooling tower cold width and heat exchanger heat exchange temperature difference is less than the outdoor air wet bulb temperature and less than the chilled water return temperature, the cooling tower cold width and plate heat exchanger heat exchange temperature difference; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is greater than the set return air temperature, the chilled water supply temperature, the cooling tower cold width-plate heat exchanger heat exchange temperature difference is less than the outdoor air wet bulb temperature and less than or equal to the chilled water return water temperature, and the cooling tower cold width-plate heat exchanger heat exchange temperature difference;
The adoption of the complete water side natural cooling path for cooling the data center machine room through the air conditioning unit comprises the following steps: when the concentration of any outdoor pollutant is greater than or equal to a corresponding set value and the wet bulb temperature of the outdoor air is less than or equal to the chilled water supply temperature, the heat exchange temperature difference of the cooling tower cold plate-type heat exchanger; or the concentration of any outdoor pollutant is smaller than the corresponding set value, the outdoor air dry bulb temperature is larger than the set return air temperature, and the outdoor air wet bulb temperature is smaller than or equal to the chilled water supply temperature, the cooling tower cold plate-plate heat exchanger heat exchange temperature difference;
the condition that the data center machine room is cooled by the air conditioning unit through the full air side natural cooling path comprises a full air side natural cooling path without starting a humidifying function and a full air side natural cooling path with starting the humidifying function, when the concentration of any outdoor pollutant is smaller than a corresponding set value, the outdoor air dry bulb temperature is smaller than or equal to a set return air temperature, the outdoor air dew point temperature is larger than or equal to the minimum limit of the data center machine room dew point temperature, the full air side natural cooling path without starting the humidifying function is adopted, and when the concentration of any outdoor pollutant is smaller than a corresponding set value, the outdoor air dry bulb temperature is smaller than or equal to a set return air temperature, and the outdoor air dew point temperature is smaller than the minimum limit of the data center machine room dew point temperature, the full air side natural cooling path with the humidifying function is adopted.
CN202310374726.0A 2023-04-10 2023-04-10 Data center wind-water economizer combined refrigerating system and working method thereof Pending CN116437631A (en)

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