WO2014041819A1 - 空調システム - Google Patents
空調システム Download PDFInfo
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- WO2014041819A1 WO2014041819A1 PCT/JP2013/005452 JP2013005452W WO2014041819A1 WO 2014041819 A1 WO2014041819 A1 WO 2014041819A1 JP 2013005452 W JP2013005452 W JP 2013005452W WO 2014041819 A1 WO2014041819 A1 WO 2014041819A1
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- WIPO (PCT)
- Prior art keywords
- indoor
- air conditioning
- conditioning system
- heat exchange
- air
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- 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
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- 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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/20—Cooling means
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- 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
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20245—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures by natural convection; Thermosiphons
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- 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
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- 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
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- 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
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
- F24F2011/0006—Control or safety arrangements for ventilation using low temperature external supply air to assist cooling
Definitions
- the present invention relates to a system for air-conditioning a rack for storing a heat generating device such as a server.
- the server room unit disclosed in Japanese Unexamined Patent Publication No. 2012-098799 is provided with a plurality of server racks and cooling equipment in casings that can be arranged adjacent to each other, and functions as a server room.
- a cold area and a hot area are defined in a casing, and the server rack can be ventilated to be arranged in a line at the boundary between the cold area and the hot area.
- the cooling facility further includes an exhaust fan configured to supply outside air to the cold area and exhaust the outside from the hot area, and an air conditioner configured to prepare the cold air and circulate the inside of the casing.
- a plurality of server room units are arranged adjacent to each other in a building, and each server room unit constitutes a server room.
- the power consumption of the server room can be reduced by using cooling using outside air.
- a filter is necessary to introduce outside air, and the filter needs to be replaced frequently. This increases the maintenance cost. It is also difficult to keep the humidity in the server room appropriate regardless of the weather and the season in the outside world.
- One aspect of the present invention is an indoor heat exchange in which a hot area side of a rack row in which a plurality of racks in which heat generating devices are stored is arranged in a horizontal direction is partitioned along the rack row, and a cold air buffer area is formed outside the hot area
- a supply fan that supplies the cold air in the cold buffer area to the cold area side of the rack row through the double floor under the rack row, and the indoor heat exchange system through the piping system.
- It is an air-conditioning system having an outdoor heat exchange system in which a refrigerant circulates.
- the indoor heat exchange system is arranged side by side with the rack row on the hot area side of the rack row to partition the hot area and outside the hot area.
- an indoor heat exchange system forms an area that becomes a hot spot in an indoor hot area in a more limited area. Since the temperature of the indoor air introduced into the indoor heat exchange system from the area that becomes the hot spot of the hot area can be kept high, a temperature difference between the indoor air to be cooled and the outside air can be secured. For this reason, the cooling efficiency of an air conditioning system can be improved and the power consumption of an air conditioning system can be reduced.
- This air conditioning system forms a cold air buffer area by an indoor heat exchange system extending along the rack row, and supplies the cold air in the cold air buffer area to the cold area side of the rack row through the floor. Therefore, when the cooling load along the rack row varies depending on the location due to differences in the output or operating state of the heat generating equipment stored in the rack row and the environment around the rack row, the indoor heat along the rack row varies. By making the capacity of the exchange system variable, the power consumption of the air conditioning system can be reduced.
- this air conditioning system is a natural circulation type. That is, the outdoor heat exchange system desirably includes a natural circulation outdoor heat exchange system in which the refrigerant naturally circulates between the indoor heat exchange system and the indoor heat exchange system.
- the natural circulation type it is possible to cool the room without introducing outside air into the room and without using a compressor. For this reason, it is possible to further reduce the power consumption, reduce the maintenance cost, and realize an air conditioning system with little influence of outside air.
- by dividing the hot area by the indoor heat exchange system and forming the cold air buffer area it is possible to secure a temperature difference between the indoor air and the outdoor air of the hot spot to be cooled. For this reason, even in a state where the outside air temperature is high, the room can be cooled by natural circulation.
- the indoor heat exchange system includes a plurality of indoor units arranged side by side in the horizontal direction, and the outdoor heat exchange system is connected to each of the plurality of indoor units via a plurality of independent piping systems. It is desirable to include an outdoor unit.
- the cooling load of the indoor unit and the outdoor unit changes due to the heat load of each rack or each area of the rack row, the power consumption of the outdoor fan provided corresponding to the outdoor unit can be individually controlled, and the power consumption of the air conditioning system Can be further reduced.
- the refrigerant can be naturally circulated according to the conditions of the combined indoor unit and outdoor unit, and the cooling capacity by natural circulation can be maximized. It is desirable that the plurality of indoor units be arranged corresponding to each of the plurality of racks arranged in the horizontal direction.
- the supply fan preferably includes a plurality of fan units arranged corresponding to the plurality of indoor units.
- the fan units are arranged in rack units. The power consumption can be further reduced by individually controlling the fan units.
- This air conditioning system desirably includes a plurality of partition members that divide the hot area side at positions corresponding to a plurality of racks arranged in the horizontal direction and prevent the distribution of hot air in the hot area.
- An example of the partition member is a flameproof curtain that does not easily become a maintenance obstacle.
- the indoor unit further includes a plurality of indoor subunits arranged above and below, and the outdoor unit includes a plurality of outdoor subunits connected to each of the plurality of indoor subunits via a piping system independent of each other. It is desirable to include. Since the cooling load of the indoor subunit and the outdoor subunit can be changed corresponding to the fluctuation of the heat load in the vertical direction of the rack, the power consumption can be further reduced. When each of the racks arranged in the horizontal direction can be stacked in the vertical direction (vertical direction), it is possible to cope with the difference in heat output of the heat generating devices stored above and below the rack. Furthermore, the cooling by natural circulation is realizable by the combination of subunits by connecting with an independent piping system.
- the indoor heat exchanging system of this air conditioning system has a plurality of indoor subunits arranged in a matrix in the vertical and horizontal directions (up, down, left and right) in parallel with the rack rows. Connected to outdoor subunit. Therefore, if the conditions of each combination (subunit pair) are adjusted by the combination of each indoor subunit and outdoor subunit, the refrigerant naturally circulates, and the cooling capacity by natural circulation is obtained. Even if the indoor subunits arranged in a matrix are not actively controlled individually (although they may be controlled), they automatically (autonomously) if the heat load removed by each indoor subunit increases.
- the matrix of indoor subunits may correspond to the racks (stages, shelves) in the vertical and horizontal directions (up, down, left, and right) of the rack row.
- the supply fan also includes a plurality of fan units that blow out cool air toward different positions above and below the rack.
- the cool air can be selectively supplied to a high heat load (heat output) at the top and bottom of the rack.
- the indoor heat exchange system may be arranged to be inclined so as to form a cold air buffer area whose upper side is narrow and whose lower side is wide.
- the cooling efficiency can be improved, and furthermore, it is easy to ensure the air volume balance in the vertical direction in the cold air buffer area.
- Another aspect of the present invention is the air conditioning system described above, a rack row in which a plurality of racks are arranged in a horizontal direction, a double floor on which the rack row is installed, a room in the rack row and the air conditioning system.
- a room unit having a housing that houses a heat exchange system.
- a typical example of the heat generating equipment stored in the rack is a server.
- the plurality of racks may include a server rack in which servers are stored vertically.
- a typical room unit is a server room unit.
- positioning of a server room The cross-sectional view which shows arrangement
- FIG. 1 shows a schematic arrangement of a container-type server room in a longitudinal (vertical) sectional view
- FIG. 2 shows a horizontal sectional view (transverse sectional view).
- the server room (server room unit) 10 is a rectangular parallelepiped container type that is long in the horizontal direction (X direction), and is disposed in the center of the housing 11 surrounding the server room 10 and the room 12 of the server room 10.
- the rack row 20, the double floor 15 on which the rack row 20 is installed, and a rack air conditioning system (air conditioning system) 50 that cools the room 12 of the server room 10 are included.
- the rack row 20 includes a plurality of racks (storage shelves, storage shelves, server racks) 21 each storing a device that generates heat, in this example, a server 25, and a cable wiring space 29 provided in the upper part of the rack 21.
- the plurality of racks 21 are arranged in a row in the longitudinal direction of the server room 10 in the horizontal direction (horizontal direction, X direction) and connected to adjacent racks 21.
- Each rack 21 has a multi-stage structure and can store a plurality of servers 25 in a multi-stage arrangement.
- the rack 21 of this example has a three-stage structure, and includes three shelves (stages) 24 at the top and bottom.
- Each server 25 housed in the rack 21 includes a fan that cools the inside, and intakes and exhausts air in the front-rear direction (Y direction) orthogonal to the longitudinal direction of the rack row 20.
- the intake direction of the server 25 is defined as the front side 22 of the server 25 and the rack 21, and the exhaust direction is defined as the rear side 23 of the server 25 and the rack 21. Therefore, the front side 22 of the rack 21 is a cold area (cold aisle) 17 and the rear side 23 is a hot area (hot aisle) 18.
- the air conditioning system 50 includes an indoor heat exchange system (indoor heat exchanger, indoor heat exchange device) 60, an outdoor heat exchange system (outdoor heat exchanger, outdoor heat exchange device) 70, a cold air supply fan 80, and an indoor heat exchange. And a piping system 90 for circulating a refrigerant between the system 60 and the outdoor heat exchange system 70.
- the indoor heat exchange system 60 includes a plurality of indoor heat exchange units (indoor units) 61, which partition the hot area 18 side of the rear side 23 of the rack row 20 along the rack row 20. Is arranged so as to form a cold air buffer area 19 outside.
- the plurality of indoor units 61 are arranged in a matrix in the vertical and horizontal directions (vertically and horizontally), form a wall parallel to the rack row 20, and function as a partition that partitions the hot area 18 and the cool air buffer area 19.
- air is circulated from the rack row 20 to the rear (rear side) 23 by a porous plate material, for example, punching metal or expansion metal, at a position about the same distance as the width (depth) of each rack 21.
- a supporting frame or supporting wall 14 is formed.
- the plurality of indoor units 61 are attached to the support wall 14 and form partitions that partition the hot area 18 and the cold air buffer area 19.
- the supply fan 80 includes a plurality of fan units 81. Those fan units 81 are arranged under the floor 16 so as to supply the cold air 2 in the cold air buffer area 19 to the cold area 17 in the front (front side) 22 of the rack row 20 via the underfloor 16 of the double floor 15. . That is, the lower side of the cool air buffer area 19 of the floor 15 is an opening 87, and the cool air 2 in the cool air buffer area 19 is discharged to the under floor 16 in a down flow.
- a gallery 85 for blowing out the cold air 2 to the cold area 17 is provided on the cold area 17 side of the floor 15, and the cold air 2 is supplied to the cold area 17 by the supply fan 80.
- the system that circulates the cold air 2 through the double floor 15 includes several advantages.
- the space-saving and economical air conditioning system 50 can be provided by using the double floor 15 as a duct. Even if condensation occurs in the cold air 2, it can be evaporated inside the double floor 15, and it is also possible to prevent the condensation from leaking out from the ceiling or the like and affecting the server.
- the cold air buffer area 19 and the cold area 17 formed outside the hot area 18 can be connected in the shortest distance, and the double floor 15 can be used as a buffer area for the cold air 2. For this reason, even if the exhaust gas temperature rises locally and the heat load of the indoor heat exchange system 60 fluctuates locally, the temperature fluctuation of the cold air 2 can be suppressed.
- the outdoor heat exchange system 70 includes a plurality of outdoor heat exchange units (outdoor units) 71, and the plurality of outdoor units 71 are disposed outside the housing 11.
- the plurality of indoor units 61 are arranged to face the rear 23 of each rack 21 in the horizontal direction (X direction, horizontal direction), respectively, and are arranged in four stages in the vertical direction (Z direction, vertical direction). Has been placed.
- Each indoor unit 61 includes a heat transfer surface 62 arranged such that a plurality of tubes extend vertically, an upper header 63 connected to the upper ends of the plurality of tubes, and a lower header 64 connected to the lower ends of the plurality of tubes. including.
- the plurality of outdoor units 71 are stacked with a space through which the outside air 5 passes at an appropriate height outside the side wall of the housing 11.
- Each outdoor unit 71 includes a heat transfer surface 72 arranged such that a plurality of tubes extend vertically, an upper header 73 connected to the upper ends of the plurality of tubes, and a lower header 74 connected to the lower ends of the plurality of tubes.
- an outside air fan 75 for supplying outside air 5 to the heat transfer surface 72.
- the piping system 90 includes a liquid refrigerant pipe 91 that communicates the lower header 74 of each outdoor unit 71 and the lower header 64 of each indoor unit 61, the upper header 63 of each indoor unit 61, and each outdoor unit 71. And a gas refrigerant pipe 92 communicating with the upper header 73.
- Each of the plurality of indoor units 61 is connected to one or a plurality of outdoor units 71 that correspond one-to-one to each indoor unit 61 by an independent piping system 90 and communicated by the independent piping system 90.
- the outdoor unit 71 operates as a pair.
- Each outdoor unit 71 is arranged at a position higher than the paired indoor unit 61 connected by pipes 91 and 92. For this reason, the refrigerant liquefied by exchanging heat with the outside air 5 in the outdoor unit 71 is supplied to the indoor unit 61 through the liquid refrigerant pipe 91 by gravity and the internal pressure difference. The gas refrigerant vaporized by the indoor heat load in the indoor unit 61 is supplied to the outdoor unit 71 with a specific gravity difference via the gas refrigerant pipe 92 and is liquefied by the outdoor air 5.
- the refrigerant naturally circulates through the paired indoor unit 61 and outdoor unit 71 connected by the independent piping system 90. For this reason, a compressor is unnecessary and the electric power required in order to operate a compressor can be omitted. Further, when the heat load (heat radiation load) of the outdoor unit 71 is small or the wind speed is sufficient, the power required to operate the outdoor air fan 75 can be saved by decelerating or stopping the outdoor air fan 75. it can. Therefore, the room 12 can be indirectly cooled through the refrigerant with low power consumption, substantially without consuming electric power depending on the conditions of the outside air, and without introducing outside air.
- the air (cold air) 2 cooled by the indoor unit 61 descends through the cold air buffer area 19 partitioned by the indoor unit 61 and passes through the space 16 under the floor, and is supplied to the rack row 20 and the front 22 of the server 25 by the supply fan 80. It is discharged into a cold area (cold aisle) 17.
- the supply fan 80 includes a plurality of fan units 81 whose installation positions and / or blowing directions (up and down and left and right) are adjusted so as to supply the cool air 2 to the racks 21 respectively stacked in the rack 21. .
- the cold air 2 blown out to the cold area 17 is sucked by a fan built in the server 25, absorbs heat inside the server 25, and serves as hot air (hot air) exhaust 1 as a hot area in the rear 23 of the rack row 20. Released to (hot aisle) 18.
- the hot exhaust 1 in the hot area 18 is cooled by an indoor unit 61 arranged in a partition form at the rear 23 of the rack row 20, and is discharged as cold air 2 to the cold air buffer area (buffer aisle) 19.
- the air conditioning system 50 cools the server 25 stored in the rack row 20 by circulating the air in the room 12. Accordingly, it is not necessary to introduce outside air, and a filter necessary for introducing outside air can be omitted. Moreover, since it is not necessary to introduce outside air, it is not necessary to adjust humidity according to the weather or season. Further, the air conditioning system 50 operates with natural circulation of the refrigerant. For this reason, if the outside air temperature is lower than the temperature of the air to be cooled in the room 12, the interior of the server room 10 can be cooled with low power consumption and with no power consumed depending on conditions.
- a plurality of indoor units 61 are arranged in the hot area 18 so as to be substantially parallel to the rack row 20 to create a partition, and a hot spot is forcibly created between the rack row 20 and the indoor unit 61. .
- the temperature of the air (exhaust) 1 to be cooled by the indoor unit 61 can be increased, a temperature difference from the outside air 5 can be secured, and the natural circulation type air conditioning system 50 even under conditions in which the outside air 5 becomes hot, such as in summer.
- the room 12 can be cooled.
- the heat-resistant temperature of the heat generating device stored in the rack 21 is about 40 ° C.
- the heat load in the room 12 can be removed by the natural circulation type air conditioning system 50 with low power consumption until the outside air temperature is about 35 ° C.
- the temperature of the room 12 can be maintained at a predetermined condition.
- a server 25 compatible with a 40 ° C. environment has been put on the market, and if it is a server room 10 storing such a server 25 with high heat resistance, the indoor 12 The temperature can be maintained within predetermined conditions.
- an air conditioning system using a compressor may be provided as an auxiliary system.
- the air conditioning system 50 further includes a flameproof curtain 55 that partitions the hot area 18 in units of racks 21.
- the flameproof curtain 55 extends from the top to the bottom of the hot area 18 and functions as a partition member that prevents the hot air from flowing in the hot area 18 at a position corresponding to each of the plurality of racks 21. Therefore, the high-temperature exhaust 1 that is a server 25 mounted on a certain rack (first rack) 21 and is discharged from the server 25 with a high load to the hot area 18 is diffused to the hot area 18 of another rack 21. This can be suppressed by the flameproof curtain 55.
- the flameproof curtain 55 makes it possible to create a hot spot behind the heavily loaded server 25 and keep the temperature of the indoor air exchanged by the indoor unit 61 in contact with the hot area 18 of the hot spot high. it can. Therefore, the difference between the indoor temperature and the outdoor temperature can be partially secured, and the pair of indoor units 61 and the outdoor unit 71 connected by the independent piping system 90 are partially indoors facing the indoor unit 61.
- the refrigerant is naturally circulated under the conditions of For this reason, the natural circulation type air conditioning system 50 including a plurality of pairs of indoor units 61 and outdoor units 71 dispersed can efficiently release the heat load of the exhaust 1 of the server 25 to the outside air 5, and the temperature of the room 12 can be reduced.
- the predetermined conditions can be maintained.
- the heat load of the indoor unit 61 in contact with the hot area 18 of the server 25 having a high load from being intensively increased, and the heat load (cooling load) of the surrounding indoor units 61 can be suppressed from being interlocked.
- the heat load (heat radiation load) of the outdoor unit 71 corresponding to the indoor unit 61 is also intensively increased, and only the outdoor air fan 75 of the outdoor unit 71 having a high heat load is driven, and other outdoor units having a low heat load.
- the outside air fan 75 of 71 can be decelerated and stopped. Therefore, since the outside air fan 75 can also be individually controlled to be turned on and off by the heat load, the power consumption of the outside air fan 75 can also be reduced.
- the partition member that partitions the hot area 18 is not limited to the flameproof curtain 55.
- the hot area 18 behind the server 25 is a space necessary for maintenance such as replacement of the server 25 and connection of cables, it is desirable that the hot area 18 can be accessed relatively freely.
- the flameproof curtain 55 can be accessed, can inhibit the flow of the exhaust 1, and can also suppress the spread of fire in the event of an emergency, so is suitable as a partition member that inhibits the flow of hot air in the hot area 18.
- the indoor unit 61 is also divided and arranged in the vertical direction. Therefore, among the servers 25 stacked in the rack 21, the thermal load of the indoor unit 61 at the position (height) where the exhaust 1 of the server 25 having a high load is processed (cooled) is increased, and the servers 25 are arranged in other stages. Further, it is possible to prevent the thermal load of the indoor unit 61 at the position (height) where the exhaust 1 of the server 25 is processed from being increased in conjunction with it.
- Fig. 3 shows different examples of container-type server rooms.
- the server room 10 also has a housing 11, a rack row 20 installed in the center of the room 12 in the server room 10, a double floor 15 that supports the rack row 20, and an air conditioning system 50 that cools the room 12 in the server room 10.
- the air conditioning system 50 includes an outdoor heat exchange system 70 including an outdoor unit 71 arranged on the ceiling of the housing 11.
- the plurality of indoor units 61 of the indoor heat exchange system 60 form a partition that is inclined so as to form a cold air buffer area 19 with the upper side 19a being narrow and the lower side 19b being wide. Accordingly, each indoor unit 61 is also tilted.
- Other configurations of the air conditioning system 50 are common to the system 50 shown in FIG.
- the indoor unit 61 By arranging the indoor unit 61 so that the lower side 19b of the cool air buffer area 19 becomes wider with respect to the vertical direction, the cross-sectional area through which the cool air 2 passes in the cool air buffer area 19 gradually increases toward the lower side 19b.
- the indoor units 61 are arranged in multiple stages in the vertical direction, the air volume of the cold air 2 that has passed through the indoor unit 61 increases toward the lower side 19b.
- the lower side 19 b of the cold air buffer area 19 is widened, so that the cold air 2 flows smoothly also on the lower side 19 b of the buffer area 19, reducing pressure loss, and even in the lower indoor unit 61. It is easy to secure the air volume that passes through the indoor unit 61.
- the indoor unit 61 is arranged obliquely with respect to the hot area 18, the area where the indoor unit 61 contacts the hot area 18 increases. Further, in each individual indoor unit 61, since the lower side of the cold air 2 is inclined so as to be wide, the cold air 2 is smoothly discharged downward. Therefore, the cooling capacity of each indoor unit 61 can be improved.
- the indoor unit 61 is arranged in the hot area 18 in parallel with the rack row 20 to partition the hot area 18, and the high temperature discharged to the hot area 18.
- the temperature of the exhaust 1 that exchanges heat with the indoor unit 61 can be kept high.
- a temperature difference between the temperature of the indoor air (exhaust) 1 that exchanges heat with the indoor unit 61 and the outside air 5 can be secured.
- the heat load of the server 25 can be removed using the air conditioning system in a state where there is no power consumption.
- the exhaust 1 of each server 25 can be cooled by the indoor unit 61 arranged in units of the rack 21. Furthermore, in the air conditioning system 50 in which the indoor units 61 are arranged in a matrix, cooling is performed by the indoor units 61 that are arranged not only on the left and right but also on the upper and lower stages. Furthermore, the indoor unit 61 and the outdoor unit 71 are paired, and the refrigerant can be naturally circulated in units of each pair. Therefore, it is possible to realize natural circulation type low power consumption cooling in units of the indoor units 61 arranged in a matrix. Moreover, the power consumption of the outdoor unit 71 connected to the indoor unit 61 having a low heat load can be suppressed, and the power consumption of the entire air conditioning system 50 can be reduced.
- the air conditioning system 50 cools the exhaust 1 of each server 25 by the indoor unit 61 and discharges it to the common cool air buffer area 19 for recirculation. Therefore, since the load fluctuation of each server 25 can be absorbed by the corresponding indoor unit 61, the temperature of the cold area 17 can be kept constant, and the influence on the ability of the other servers 25 can be suppressed.
- the server 25 is described as an example of the heat generating device.
- the device mounted on the rack 21 is not limited to the server 25, and a power conditioner (PCS) used in a large-scale solar power plant, It may be a communication / exchange device or the like arranged in a mobile phone base station.
- PCS power conditioner
- the container type server room (server room unit) 10 that can be installed independently has been described above as an example.
- the server room is not limited to the container type, and may be a server room in a data center.
- the rack row is not limited to one row and may be two or more rows.
- a plurality of indoor units 61 are arranged above and below, and the outdoor unit 71 is arranged corresponding to each indoor unit 61.
- one indoor unit 61 may be arranged for each rack.
- a plurality of racks may be cooled by the common indoor unit 61.
- the arrangement of the outdoor units 71 is not limited to the above, and the plurality of indoor units 61 are divided into a plurality of groups based on the thermal load or the expected operation of the server 25 and connected to the groups of the indoor units 61 in common. It is also possible to provide the outdoor unit 71.
- An air conditioning system in which a plurality of indoor units 61 operate collectively is also included in the present invention.
- the plurality of indoor units 61 are individually divided into appropriate areas and designed to be cooled by a natural circulation method. Is desirable.
- the outdoor air fan 75 may be provided corresponding to each outdoor unit 71, or a plurality of outdoor units 71 may be divided into appropriate groups and provided corresponding to each group. Furthermore, it is also possible to provide an indoor fan that controls the flow rate passing through the individual indoor units 61 or the indoor units 61 as a group.
- the air conditioning system described above employs a natural circulation thermosiphon system (cooling device) that is considered to be the most energy-saving as a means for releasing indoor heat generation to the outside.
- the cooling system of the present invention is not limited to the natural circulation type.
- the heat dissipation method is not limited to the thermosiphon, but a liquid circulation (pump type) system using cold water or brine, or a refrigeration cycle system using a compressor can also be used.
Abstract
Description
Claims (12)
- 発熱機器が収納される複数のラックが横方向に並んだラック列のホットエリア側を前記ラック列に沿って仕切り、前記ホットエリアの外側に冷気バッファエリアを形成する室内熱交換システムと、
前記冷気バッファエリアの冷気を、前記ラック列が上に配置される二重床の床下を介して前記ラック列のコールドエリア側に供給する供給ファンと、
配管システムを介して前記室内熱交換システムとの間で冷媒が循環する室外熱交換システムとを有する空調システム。 - 請求項1において、前記室外熱交換システムは、前記室内熱交換システムとの間で冷媒が自然循環する自然循環用室外熱交換システムを含む、空調システム。
- 請求項1または2において、前記室内熱交換システムは、横方向に並んで配置された複数の室内ユニットを含み、
前記室外熱交換システムは、前記複数の室内ユニットのそれぞれと独立した配管システムを介して接続された複数の室外ユニットを含む、空調システム。 - 請求項3において、前記供給ファンは、前記複数の室内ユニットのそれぞれに対応して配置された複数のファンユニットを含む、空調システム。
- 請求項3または4において、前記複数の室内ユニットは、横方向に並んだ前記複数のラックのそれぞれに対応して配置されている、空調システム。
- 請求項5において、前記ラック列に沿って形成される前記ホットエリアを、横方向に並んだ前記複数のラックのそれぞれに対応した位置で仕切り、ホットエアーの流通を妨げる複数の仕切り部材を有する、空調システム。
- 請求項3ないし6のいずれかにおいて、前記複数の室内ユニットの少なくとも1つは、上下に配置された複数の室内サブユニットを含み、
前記複数の室外ユニットの少なくとも1つは、前記複数の室内サブユニットのそれぞれと独立した配管システムを介して接続された複数の室外サブユニットを含む、空調システム。 - 請求項7において、前記室内熱交換システムは、マトリクス状に配置された前記複数の室内サブユニットを含む、空調システム。
- 請求項7または8において、前記供給ファンは、前記複数のラックのいずれかの上下異なる位置に向けて冷気を吹出す複数のファンユニットを含む、空調システム。
- 請求項1ないし9のいずれかにおいて、前記室内熱交換システムは、上側が狭く下側が広い前記冷気バッファエリアを形成する、空調システム。
- 請求項1ないし10のいずれかに記載の空調システムと、
複数のラックが横方向に並んだラック列と、
前記ラック列が上に設置された二重床と、
前記ラック列および前記空調システムの室内熱交換システムを収納するハウジングとを有する、ルームユニット。 - 請求項11において、前記複数のラックは、サーバが上下に収納されるサーバ用ラックを含む、ルームユニット。
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US14/375,055 US20150181769A1 (en) | 2012-09-14 | 2013-09-13 | Air conditioning system |
SG11201405389VA SG11201405389VA (en) | 2012-09-14 | 2013-09-13 | Air conditioning system |
EP13837834.4A EP2811366A4 (en) | 2012-09-14 | 2013-09-13 | AIR CONDITIONING SYSTEM |
JP2014535385A JPWO2014041819A1 (ja) | 2012-09-14 | 2013-09-13 | 空調システム |
CN201380021870.0A CN104254814A (zh) | 2012-09-14 | 2013-09-13 | 空调系统 |
HK15104184.1A HK1203667A1 (en) | 2012-09-14 | 2015-04-30 | Air conditioning system |
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PCT/JP2013/005452 WO2014041819A1 (ja) | 2012-09-14 | 2013-09-13 | 空調システム |
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US (1) | US20150181769A1 (ja) |
EP (1) | EP2811366A4 (ja) |
JP (1) | JPWO2014041819A1 (ja) |
CN (1) | CN104254814A (ja) |
HK (1) | HK1203667A1 (ja) |
SG (1) | SG11201405389VA (ja) |
TW (1) | TW201411064A (ja) |
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HK1203667A1 (en) | 2015-10-30 |
EP2811366A1 (en) | 2014-12-10 |
EP2811366A4 (en) | 2016-09-28 |
JPWO2014041819A1 (ja) | 2016-08-18 |
CN104254814A (zh) | 2014-12-31 |
US20150181769A1 (en) | 2015-06-25 |
SG11201405389VA (en) | 2014-11-27 |
TW201411064A (zh) | 2014-03-16 |
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