WO2016088613A1 - Air-conditioning control device and air-conditioning control method - Google Patents

Air-conditioning control device and air-conditioning control method Download PDF

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Publication number
WO2016088613A1
WO2016088613A1 PCT/JP2015/082983 JP2015082983W WO2016088613A1 WO 2016088613 A1 WO2016088613 A1 WO 2016088613A1 JP 2015082983 W JP2015082983 W JP 2015082983W WO 2016088613 A1 WO2016088613 A1 WO 2016088613A1
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WIPO (PCT)
Prior art keywords
air volume
cooling device
aisle
air
cold aisle
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PCT/JP2015/082983
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French (fr)
Japanese (ja)
Inventor
伊藤　潤一
泰彦 稲富
田中　真
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株式会社日立製作所
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Publication of WO2016088613A1 publication Critical patent/WO2016088613A1/en

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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • 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

Definitions

  • the present invention relates to a technology of an air conditioning control device and an air conditioning control method for controlling the air conditioning of a server room.
  • the rack mount system is a system in which racks (housings) for storing devices divided into functional units are stacked in a cabinet, and a large number of such cabinets are arranged in a line on the floor of a server room.
  • the equipment stored in the rack generally sucks low temperature air from the front, cools the inside of the equipment, and exhausts high temperature air from the back.
  • the server room is managed in a constant temperature environment by cooling the high-temperature air exhausted from the devices by the cooling device. .
  • such rack rows are arranged in a plurality of rows with the suction surfaces and the exhaust surfaces of adjacent rows facing each other. That is, the suction ports are arranged so as to face each other and the exhaust ports face each other across the passage (space).
  • the space sandwiched between the suction surfaces is called cold aisle because low-temperature air cooled by a cooling device is supplied.
  • the space sandwiched between the exhaust surfaces is called hot aisle because high temperature exhaust from the equipment is supplied.
  • a floor blowing system that supplies low-temperature air cooled by a large cooling device installed near the machine room or server room wall to the cold aisle through the double floor space of the server room is generally used.
  • the heat generation amount of equipment has increased with the rapid increase in equipment processing speed and equipment processing capacity, and the cooling load has increased. Therefore, energy saving (energy saving) of the cooling system is required. It has been. For this reason, an increasing number of cases adopt a local cooling system in which equipment is locally cooled by a rack-type cooling device arranged in a rack row or a ceiling-type cooling device installed on a ceiling near the rack.
  • the air conditioning system described in Patent Document 1 is a system that uses both a local cooling method and a floor blowing method using a ceiling-suspended cooling device.
  • the air conditioning system described in Patent Literature 1 cools the base heat load of the equipment by the floor blowing method, and cools the other heat loads by local cooling.
  • the temperature difference of the inlet / outlet air of the cooling device is measured, and the cooling operation according to the heat load of the device can be performed by changing the air volume of the cooling device according to the measured temperature difference.
  • the air conditioning system described in Patent Document 2 is a system that uses both a local cooling method using a rack-type cooling device and a floor blowing method.
  • the air conditioning system described in Patent Document 2 is configured to partition the hot aisle and the cold aisle so that the hot aisles and the cold aisle communicate with each other instead of partitioning the hot aisle and the cold aisle for each aisle. By doing so, the air conditioning system described in Patent Document 2 can automatically maintain the balance of the air volume due to the static pressure difference even when the rack-type cooling device fails.
  • the present invention has been made in view of such a background, and the present invention has an object to operate an optimum cooling system.
  • the present invention is characterized in that the operating states of a plurality of cooling devices in which the sum of the excess air volume in the cold aisle and the hot aisle is not more than a predetermined value are selected.
  • Other solutions will be described in the embodiments.
  • an optimum cooling system can be operated.
  • FIG. 1 It is a top surface schematic diagram in the example of composition of the cooling system concerning a 1st embodiment. It is a figure which shows the structural example of the control apparatus which concerns on 1st Embodiment. It is a flowchart which shows the procedure of the selection process of the optimal driving
  • composition of a cooling system concerning a 1st embodiment, it is a figure showing when a failure has occurred in a cooling device. It is an upper surface schematic diagram of the cooling system which concerns on 2nd Embodiment. It is a perspective view of the cooling system which concerns on 2nd Embodiment.
  • FIG. 1 is a schematic top view of a configuration example of a cooling system according to the first embodiment.
  • the cooling system 10 according to the present embodiment is provided with a plurality of racks 5 that house devices 4 that suck in low-temperature air from the front and exhaust high-temperature air from the back.
  • the cooling device 3 is a rack-type cooling device, and is disposed in the vicinity of the rack 5 to locally cool the devices 4 such as servers in the rack 5.
  • the vertical direction of the drawing is referred to as a column.
  • only one device 4 is shown in order to prevent the drawing from being complicated, but actually, a plurality of devices 4 are housed in each rack 5.
  • the rack 5 storing the equipment 4 and the cooling device 3 are installed in a server room 11 which is a room.
  • a continuous row of racks 5 is referred to as a rack row 2.
  • the rack row 2 includes a cooling device 3. In the same row, they are arranged in the same direction, and in the rack row 2, each rack 5 (device 4) is arranged so that the suction surface and the exhaust surface face in the same direction (for the intake and exhaust of the cooling device 3). (Postscript). Further, the rack rows 2 are arranged such that the suction surfaces and the exhaust surfaces of the rack 5 face each other. Thereby, the space between the suction surfaces becomes the cold aisle 6, and the space between the exhaust surfaces becomes the hot aisle 7.
  • high temperature air is indicated by black arrows and low temperature air is indicated by white arrows.
  • the cooling device 3 sucks in the high-temperature air of the hot aisle 7, cools the high-temperature air, and supplies low-temperature air to the cold aisle 6.
  • the cooling system 10 is provided with a control device (the air conditioning control device 1) that calculates the air volume of the cold aisle 6 and the hot aisle 7 from the operating state of each cooling device 3 and searches for the optimal operating state of the cooling device 3. Yes.
  • the air conditioning control device 1 calculates the air volume of the cold aisle 6 and the hot aisle 7 from the operating state of each cooling device 3 and searches for the optimal operating state of the cooling device 3. Yes.
  • the control device 1 is connected to each cooling device 3 as indicated by a broken line, and controls the operating state of the cooling device 3 so that the air volume balance by the cooling device 3 is appropriate. Note that the alternate long and short dash line in FIG. 1 indicates the wall of the server room 11.
  • FIG. 2 is a diagram illustrating a configuration example of the control device according to the first embodiment. Reference is made to FIG. 1 as appropriate.
  • the control device 1 includes a memory 110 such as a RAM (Random Access Memory), a CPU (Central Processing Unit) 120, a storage device 130 such as an HD (Hard Disk), and a transmission / reception device 140.
  • the program stored in the storage device 130 is expanded in the memory 110 and executed by the CPU 120, so that the processing unit 111 is embodied, and the operation state selection unit 112 constituting the processing unit 111, the air flow balance calculation.
  • the unit 113, the operation coefficient calculation unit 114, the optimum operation state selection unit 115, and the cooling device control unit 116 are embodied.
  • the operation state selection unit (operation state search unit) 112 selects the operation state of the cooling device 3.
  • the air volume balance calculating unit (operating state searching unit) 113 is an air volume balance that is a balance of the intake air amount and the exhaust air amount in each cold aisle 6 and each hot aisle 7 in the operation state of the cooling device 3 selected by the operation state selecting unit 112. Is calculated.
  • the operation coefficient calculation unit (operation state search unit) 114 calculates an operation coefficient based on the air volume balance calculated by the air volume balance calculation unit 113.
  • the optimum operation state selection unit (operation state search unit) 115 selects the operation state of the cooling device 3 in which the calculated operation coefficient is equal to or less than a predetermined value (smallest here).
  • the cooling device control unit 116 controls each cooling device 3 so as to be in the operation state of the cooling device 3 selected by the optimum operation state selection unit 115.
  • FIG. 3 is a flowchart illustrating a procedure for selecting an optimum operation state of the cooling device according to the first embodiment. Reference is made to FIGS. 1 and 2 as appropriate.
  • the operation state selection unit 112 selects one combination of operation states of the cooling device 3 (S101).
  • the air volume balance calculating unit 113 calculates a total device air volume that is the sum of the air volume sucked by the device 4 stored in the rack 5 in each rack row 2 and the air volume discharged by the device 4 (S102). The process of step S102 will be described later.
  • the air volume balance calculation unit 113 calculates the cooling device total air volume that is the sum of the air volume sucked by the cooling device 3 and the air volume discharged by the cooling device 3 in each rack row 2 (S103). The process of step S103 will be described later.
  • the air volume balance calculating unit 113 calculates a cold aisle air volume balance, which is an air volume balance in the cold aisle 6, based on the calculated total device air volume and cooling device total air volume (S104). And the air volume balance calculation part 113 calculates the hot aisle air volume balance which is the air volume balance in the hot aisle 7 based on the calculated apparatus total air volume and cooling device total air volume (S105). The processing of step S104 and step S105 will be described later.
  • the operation coefficient calculation unit 114 calculates an operation coefficient based on the cold aisle air volume balance calculated in step S104 and the hot aisle air volume balance calculated in step S105 (S106). The process of step S106 will be described later. After the operation coefficient is calculated, the operation coefficient calculation unit 114 primarily stores the calculated operation coefficient in the storage device 130 together with information on the combination of operation states of the cooling device 3 that is the processing target.
  • the operation state selection unit 112 determines whether or not the calculation of the operation coefficient has been completed for all combinations of the operation states of the cooling device 3 (S107). As a result of step S107, when calculation of the operation coefficient is not completed for all combinations (S107 ⁇ No), the operation state selection unit 112 returns the process to step S101. As a result of step S107, when the operation coefficient is calculated for all combinations (S107 ⁇ Yes), the optimum operation state selection unit 115 selects the optimum operation state that is the operation state having the smallest operation coefficient (S108). And the cooling device control part 116 controls each cooling device 3 so that it may be in the driving
  • FIG. 4 is a generalized diagram of the configuration of the server room shown in FIG. 1 for the description of the air volume calculation.
  • each rack row 2 is indicated by (n, m).
  • n indicates the position with respect to the vertical direction of the paper. That is, from the top of the page,..., N-1, n, n + 1.
  • m indicates a position with respect to the left and right direction on the paper surface. That is, m ⁇ 1, m, m + 1.
  • n is referred to as a row and m is referred to as a column. Assume that the total number of rows and columns is N ⁇ M.
  • n indicates a position with respect to the vertical direction of the paper surface
  • m indicates a position with respect to the horizontal direction of the paper surface.
  • the value of n changes one by one (... n-1, n, n + 1 ...), but in the horizontal direction of the paper, cold aisle and 6 hot aisles 7 alternate. Are changed two by two (..., M + 2).
  • FIG. 5 is a diagram showing the relationship of the air volume in the server room shown in FIG.
  • the equipment 4 in the rack row (n, m) sucks the cold air from the cold aisle (n, m) and discharges the hot air to the hot aisle (n, m).
  • This is the total equipment air volume Q j, n, m . That is, Q j, n, m is the air volume of air that is sucked and discharged by all the devices 4 housed in the rack 5 in a certain rack row 2.
  • the cooling device 3 in the rack row (n, m) sucks high-temperature air from the hot aisle (n, m) and discharges low-temperature air to the cold aisle (n, m).
  • This is the total cooling device air volume Q k, n, m . That is, Q k, n, m is the air volume of the air sucked and discharged by all the cooling devices 3 in a certain rack row 2. Note that q n, m and q n + 1, m in cold aisle (n, m) will be described later.
  • the air volume balance calculating unit 113 calculates Q j, n, m and Q k, n, m for all rack rows 2.
  • the total air volume of the equipment and the total air volume of the cooling device are calculated by the air volume balance calculation unit 113 based on the specifications of each device 4 input in advance, the specifications of the cooling device 3, and the like.
  • the processing up to this point is the processing of step S102 and step S103 in FIG.
  • the air volume balance calculation unit 113 of the control device 1 calculates the air volume balance for each cold aisle 6 and hot aisle 7 adjacent to each rack row 2. That is, the air volume balance calculating unit 113 calculates the air volume balance of each cold aisle 6 based on the total equipment air volume and the cooling device total air volume of the rack row 2 adjacent to each cold aisle 6. Similarly, the air volume balance calculating unit 113 calculates the air volume balance of each hot aisle 7 based on the total equipment air volume and the cooling device total air volume of the rack row 2 adjacent to each hot aisle 7.
  • FIG. 6 (a) is a figure which shows the air volume balance in the cold aisle (n, m) of FIG.
  • Q j, n, m-1 is the air volume of the low-temperature air sucked by the equipment 4 in the rack row (n, m-1) from the cold aisle (n, m).
  • Q j, n, m is the air volume of the low-temperature air sucked by the device 4 in the rack row (n, m) from the cold aisle (n, m).
  • Q k, n, m ⁇ 1 is the air volume of the low-temperature air discharged from the cooling device 3 in the rack row (n, m ⁇ 1) to the cold aisle (n, m).
  • Q k, n, m is the air volume of the low-temperature air discharged from the cooling device 3 in the rack row (n, m) to the cold aisle (n, m).
  • q n, m is the air volume of the low-temperature air exchanged with the cold aisle (n ⁇ 1, m) adjacent to the cold aisle (n, m).
  • q n + 1, m is the air volume of low-temperature air exchanged with the cold aisle (n + 1, m) adjacent to the cold aisle (n, m).
  • the air volume balance QC , n, m in the cold aisle (n, m) is the total equipment air flow for the rack row (n, m-1) and the rack row (n, m) adjacent to the cold aisle (n, m) and Since it is the sum total of the cooling device total air volume, it is expressed by the following equation (1).
  • the air volume flowing into the cold aisle (n, m) is positive, and the air volume flowing out from the cold aisle (n, m) is negative.
  • the excess and deficiency of the air volume in the cold aisle (n, m) is the air volume of the low-temperature air exchanged between the adjacent cold aisle (n-1, m) and the cold aisle (n + 1, m).
  • the expression (1) is expressed by the following equation:
  • the air volume q n, m of cold air exchanged between the cold aisle (n, m) and the cold aisle (n-1, m) and the cold aisle (n, m) In consideration of the air volume q n + 1, m of the low-temperature air exchanged between and the cold aisle (n + 1, m), it is expressed as the following equation (2).
  • FIG.6 (b) is a figure which shows the air volume balance in the hot aisle (n, m) of FIG.
  • Q j, n, m is the air volume of the high-temperature air discharged from the equipment 4 in the rack row (n, m) to the hot aisle (n, m).
  • Q j, n, m + 1 is the air volume of the high-temperature air discharged from the devices in the rack row (n, m + 1) to the hot aisle (n, m).
  • Q k, n, m is the air volume of the high-temperature air that the cooling device 3 in the rack row (n, m) sucks from the hot aisle (n, m).
  • Q k, n, m + 1 is the air volume of the high-temperature air that the cooling device 3 in the rack row (n, m + 1) sucks from the hot aisle (n, m).
  • the air volume balance Q H, n, m in the hot aisle (n, m) is the equipment total air volume and the cooling device for the rack row (n, m) and the rack row (n, m + 1) adjacent to the hot aisle (n, m). Since it is the sum total of the total air volume, it is expressed by the following equation (3).
  • the air volume flowing into the hot aisle (n, m) is positive, and the air volume flowing out from the hot aisle (n, m) is negative.
  • the air volume supplied to the hot aisle 7 is excessive than the air volume discharged from the hot aisle 7, the air volume of the high-temperature air may flow into the cold aisle 6, and the device 4 may suck the air volume of the high-temperature air. is there. Therefore, the air volume balance Q H, n, m in the hot aisle (n, m) must meet the conditions of the following equation (4).
  • step S104 is the processing of step S104 and step S105 in FIG.
  • Qj, n, 0 , Qj, n, M , Qj, 0, m , Qj, N, m , Qk, n, 0 , Qk, n, M , Qk, 0, m , Qk, N, m , q1 , m , qN + 1, m are the air volumes at the wall of the server room 11, and all have values of zero.
  • the operation coefficient calculation unit 114 calculates an operation coefficient representing the surplus air volume from the air volume balance calculated in each cold aisle 6 and each hot aisle 7 and calculates the combination of the states of the cooling device 3 that minimizes the operation coefficient. Select.
  • the air volume balance of the cold aisle 6 is from the rack row (1, m) to the rack row (N, m). It is necessary that the sum is minimized, and the absolute value of the sum is from the rack row (n, 1) to the rack row (n, M). Therefore, the operating coefficient in the cold aisle 6 is the operating state of the cooling device 3 in which the cold aisle operating coefficient ⁇ C expressed by the following equation (5) is minimized.
  • Formula (6) is the sum total of the absolute value of the air volume balance in each hot aisle 7.
  • each operation coefficient ⁇ C , ⁇ H is a surplus air volume in the cold aisle 6 and the hot aisle 7.
  • the operation coefficient calculation unit 114 calculates the operation coefficient ⁇ represented by Expression (7), which is the sum of the cold aisle operation coefficient ⁇ C according to Expression (5) and the hot aisle operation coefficient ⁇ H according to Expression (6).
  • the operation coefficient calculation unit 114 calculates the cold aisle operation coefficient ⁇ C , the hot aisle operation coefficient ⁇ H, and the operation coefficient ⁇ based on the equipment air volume and the cooling apparatus air volume related to the combination of operating states of the respective cooling devices 3. calculate. Then, the optimum operation state selection unit 115 identifies the combination of operation states of the cooling device 3 that minimizes the operation coefficient ⁇ in step S108 of FIG. In this way, the control device 1 searches for and selects the optimum operating state of the cooling device 3.
  • the air volume of the device 4 used when calculating the operating coefficient and the air volume of the cooling device 3 may be used by measuring the actual operating air volume, or by measuring the power consumption and the air temperature. May be used in anticipation. Further, the operating coefficient may be calculated using the rated airflow values of the device 4 and the cooling device 3. In addition, a genetic algorithm, a local search method, or an optimization algorithm such as a neural network may be used to search for the operation state of the cooling device 3 at which the operation coefficient ⁇ is the minimum value. By using such an optimization algorithm, it is not necessary to calculate the operating coefficient ⁇ for all operating states of the cooling device 3.
  • the operation coefficient ⁇ is set.
  • the optimum operation state selection unit 115 searches whether it can be minimized. If the cooling device 3 can adjust the operating state in a stepwise manner from “strong” to “weak”, the operation coefficient calculation unit 114 determines the operating coefficient for each operating state of each cooling device 3. Calculate whether ⁇ can be minimized. The processing up to this point is the processing of step S106 and step S108 in FIG.
  • the present embodiment it is possible to perform a cooling operation that realizes energy saving without breaking the air volume balance between the cold aisle 6 and the hot aisle 7. Further, the local cooling configuration enables air conditioning of the entire server room 11 that realizes energy saving, so that the initial cost can be reduced.
  • the air volume balance calculation unit 113 sets the air volume flowing into the cold aisle 6 and the hot aisle 7 as positive, the air volume flowing out from the cold aisle and the hot aisle as negative, and the inflow air volume and the exhaust air volume in the cold aisle and the hot aisle.
  • the total air volume balance is calculated for each cold aisle and hot aisle.
  • the operation coefficient calculation unit 114 adds the air volume balance in the cold aisle in the column where the cold aisle is connected, and adds the absolute value of the addition result for each column to the cold aisle operation coefficient ( ⁇ C : Calculated as surplus air volume of the cold aisle 6).
  • the operation coefficient calculation unit 114, the hot aisle operation coefficient sum of the absolute values of air flow balance in the hot aisle is calculated as (theta H excess air volume of the hot aisle 7).
  • the operation state selection unit 115 calculates the operation coefficient ( ⁇ ) by adding the cold aisle operation coefficient and the hot aisle operation coefficient, and searches for (selects) the operation state of the cooling device having the smallest operation coefficient. . By doing in this way, search (selection) of an optimal driving
  • a spare machine for the cooling device 3 (hereinafter referred to as the preliminary cooling device 3 a) is installed in order to prevent the failure of the device 4 due to the temperature rise of the cold aisle 6.
  • the two rack rows 2 adjacent to the hot aisle 7 are defined as one section, it is preferable that at least one precooling device 3a is installed in one section.
  • the optimum operation state can be maintained by calculating the combination of the operation state of the cooling device 3 and the preliminary cooling device 3a that minimizes the operation coefficient ⁇ by the above-described method. Thereby, the reliability of the cooling system 10 can be improved.
  • FIG. 9 is a schematic top view of the cooling system according to the second embodiment
  • FIG. 10 is a perspective view of the cooling system according to the second embodiment.
  • the ceiling-mounted cooling device 8 is installed in the upper part of each rack 5.
  • the equipment 4 (FIG. 1) is accommodated in each rack 5.
  • the ceiling-mounted cooling device 8 is in a state of completely covering the upper part of the hot aisle 7 (FIG. 10).
  • the ceiling-suspended cooling device 8 sucks high-temperature air (dotted arrow in FIG.
  • control device 1 calculates the combination of the operation states of the ceiling-mounted cooling device 8 that minimizes the operation coefficient ⁇ described above, and thus, a cooling system that realizes energy saving, as in the first embodiment. Even if either the operation of 10a or the ceiling-mounted cooling device 8 breaks down, the optimal operation of the cooling system 10a can be performed.
  • the configuration of the control device 1 is the same as that shown in FIG. 2, and the search and selection of the optimum operation state is the same as that in the first embodiment.
  • the present invention is not limited to the above-described embodiment, and includes various modifications.
  • the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to having all the configurations described.
  • a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.
  • each of the above-described configurations, functions, the respective units 111 to 116, the storage device 130, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Further, as shown in FIG. 2, the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by a processor such as a CPU. In addition to storing the program, table, file, etc.
  • control line and the information line are those that are considered necessary for the explanation, and not all the control lines and the information lines are necessarily shown. In practice, it can be considered that almost all configurations are connected to each other.
  • Control device air conditioning control device 2 rack row 3, 31 cooling device 3a, 32 preliminary cooling device 4 equipment 5 rack 6 cold aisle 7 hot aisle 8 ceiling-mounted cooling device 10, 10a cooling system 11, 11a server room (room) 111 processing unit 112 operation state selection unit (operation state search unit) 113 Airflow balance calculation unit (operating state search unit) 114 Driving coefficient calculation unit (driving state search unit) 115 Optimal operation state selection unit (operation state search unit) 116 Cooling device controller

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
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Abstract

Provided is a control device (1) for controlling a plurality of cooling devices (3) installed for the purpose of cooling equipment (4) in a room having cold aisles (6) and hot aisles (7), the device characterized by having an operating state search unit for calculating a combination of operating states of the cooling devices (3) such that the sum of the excess air volume of the cold aisles (6) and the excess air volume of the hot aisles (7) does not exceed a prescribed level, and a cooling device control unit (116) for controlling the cooling devices (3) so as to bring about the calculated operating states of the cooling devices (3).

Description

空調制御装置及び空調制御方法Air conditioning control device and air conditioning control method
　本発明は、サーバルームの空調を制御する空調制御装置及び空調制御方法の技術に関する。 The present invention relates to a technology of an air conditioning control device and an air conditioning control method for controlling the air conditioning of a server room.
　サーバルームには、コンピュータやサーバ等の電子機器（以下、機器と称する）が集約された状態で多数設置され、これらの機器が昼夜にわたって連続稼働している。サーバルームにおける機器の設置は、ラックマウント方式が主流になっている。ラックマウント方式は、機器を機能単位別に分割して収納するラック（筺体）を、キャビネットに段積みする方式であり、かかるキャビネットがサーバルームの床上に多数整列配置されている。ラックに収納されている機器は前面から低温空気を吸い込み、機器の内部を冷却して背面から高温空気を排気するものが一般的である。 In the server room, a large number of electronic devices such as computers and servers (hereinafter referred to as devices) are installed in a centralized state, and these devices are continuously operated day and night. Rack-mounting is the mainstream for installing equipment in server rooms. The rack mount system is a system in which racks (housings) for storing devices divided into functional units are stacked in a cabinet, and a large number of such cabinets are arranged in a line on the floor of a server room. The equipment stored in the rack generally sucks low temperature air from the front, cools the inside of the equipment, and exhausts high temperature air from the back.
　これらの機器は、高温状態になるとシステム停止等のトラブルを引き起こすおそれがあるため、冷却装置によって機器から排気された高温空気を冷却することで、サーバルームは、一定の温度環境に管理されている。 Since these devices may cause problems such as system shutdown when they reach a high temperature state, the server room is managed in a constant temperature environment by cooling the high-temperature air exhausted from the devices by the cooling device. .
　さらに、サーバルームでは、このようなラック列が、隣接する列の吸込面同士及び排気面同士を対向させて複数列配置される。つまり、通路（空間）を挟んで吸込み口同士が対面し、排気口同士が対面するように配置されている。吸込面同士で挟まれた空間は冷却装置で冷却した低温空気が供給されることからコールドアイルと呼ばれる。同様に、排気面同士で挟まれた空間は機器からの高温排気が供給されることからホットアイルと呼ばれている。 Furthermore, in the server room, such rack rows are arranged in a plurality of rows with the suction surfaces and the exhaust surfaces of adjacent rows facing each other. That is, the suction ports are arranged so as to face each other and the exhaust ports face each other across the passage (space). The space sandwiched between the suction surfaces is called cold aisle because low-temperature air cooled by a cooling device is supplied. Similarly, the space sandwiched between the exhaust surfaces is called hot aisle because high temperature exhaust from the equipment is supplied.
　従来におけるサーバルームの空調方式では、機械室又はサーバルーム壁際に設置された大型の冷却装置で冷却された低温空気をサーバルームの二重床空間を介してコールドアイルに供給する床吹出し方式が一般的である。しかし、近年では、機器の処理速度や、機器の処理能力の急激な上昇に伴い機器の発熱量が増大し、冷却負荷が増大していることから、冷却システムの省エネ（省エネルギ）化が求められている。そのため、ラック列に配置するラック型の冷却装置やラック近傍の天井に設置する天吊型の冷却装置により局所的に機器の冷却を行う局所冷却方式を採用するケースが増加している。 In the conventional server room air conditioning system, a floor blowing system that supplies low-temperature air cooled by a large cooling device installed near the machine room or server room wall to the cold aisle through the double floor space of the server room is generally used. Is. However, in recent years, the heat generation amount of equipment has increased with the rapid increase in equipment processing speed and equipment processing capacity, and the cooling load has increased. Therefore, energy saving (energy saving) of the cooling system is required. It has been. For this reason, an increasing number of cases adopt a local cooling system in which equipment is locally cooled by a rack-type cooling device arranged in a rack row or a ceiling-type cooling device installed on a ceiling near the rack.
　このような局所冷却方式では、二重床空間を介さずに冷却した空気をコールドアイルに供給することができるので、送風動力を削減できるだけでなく床下空間を小さくすることができる。一方、サーバルーム内に設置される機器は稼働後の増設や移設を見越して計画されることから、多くの場合、サーバルーム稼働時の熱負荷は計画した熱負荷よりも小さい。 In such a local cooling method, since the cooled air can be supplied to the cold aisle without going through the double floor space, not only the blowing power can be reduced but also the space under the floor can be reduced. On the other hand, since the equipment installed in the server room is planned in anticipation of expansion and relocation after operation, in many cases, the heat load during operation of the server room is smaller than the planned heat load.
　それに対し、冷却装置はサーバルーム稼働後に増設することが困難であり、予め計画熱負荷を処理できる冷却装置を設置しておくケースが多い。
　さらに、サーバルームの冷却システムでは、冷却装置が故障した場合、機器に供給される低温空気の温度が上昇し、機器を破損させる恐れがあるため、予備の冷却装置の設置が要求される。したがって、サーバルームの冷却装置は、熱負荷に対して過剰に設置されており、冷却装置を最適な組み合わせで運転しなければ、過剰運転により省エネ性が損なわれる恐れがある。また、機器の増設時や冷却装置の故障時等に冷却装置の運転を切り替える場合、コールドアイル及びホットアイルの風量バランスが崩れ、機器が高温空気を吸い込み、機器が破損してしまう恐れがある。 On the other hand, it is difficult to add a cooling device after the server room is operated, and there are many cases where a cooling device capable of processing a planned heat load is installed in advance.
Further, in the server room cooling system, if the cooling device fails, the temperature of the low-temperature air supplied to the device rises, and the device may be damaged, so that a spare cooling device is required to be installed. Accordingly, the server room cooling apparatus is excessively installed with respect to the heat load, and unless the cooling apparatuses are operated in an optimum combination, there is a possibility that the energy saving performance may be impaired due to the excessive operation. In addition, when switching the operation of the cooling device when the device is added or when the cooling device is broken, the air volume balance between the cold aisle and the hot aisle is lost, and the device may inhale high-temperature air and the device may be damaged.
　このような背景から、局所冷却方式により機器を冷却する場合の冷却装置の最適な運転方法について様々な技術が開示されている。例えば、特許文献１に記載の空調システムは、天吊型の冷却装置による局所冷却方式と床吹出し方式を併用したシステムである。特許文献１に記載の空調システムは、機器のベース熱負荷を床吹出し方式で冷却し、それ以外の熱負荷を局所冷却により冷却する。局所冷却では、冷却装置の出入口空気の温度差が測定され、測定温度差に応じて冷却装置の風量を変えることで機器の熱負荷に応じた冷却運転を行うことができる。 From such a background, various techniques have been disclosed for the optimum operation method of the cooling device when the equipment is cooled by the local cooling method. For example, the air conditioning system described in Patent Document 1 is a system that uses both a local cooling method and a floor blowing method using a ceiling-suspended cooling device. The air conditioning system described in Patent Literature 1 cools the base heat load of the equipment by the floor blowing method, and cools the other heat loads by local cooling. In the local cooling, the temperature difference of the inlet / outlet air of the cooling device is measured, and the cooling operation according to the heat load of the device can be performed by changing the air volume of the cooling device according to the measured temperature difference.
　また、例えば、特許文献２に記載の空調システムは、ラック型の冷却装置による局所冷却方式と床吹出し方式を併用したシステムである。特許文献２に記載の空調システムは、ホットアイル及びコールドアイルをアイル毎に間仕切るのではなく、ホットアイル同士及びコールドアイル同士を連通するように間仕切る構成としている。このようにすることで、特許文献２に記載の空調システムは、ラック型冷却装置が故障した場合にも静圧差により自動的に風量のバランスを保つことができる。 Also, for example, the air conditioning system described in Patent Document 2 is a system that uses both a local cooling method using a rack-type cooling device and a floor blowing method. The air conditioning system described in Patent Document 2 is configured to partition the hot aisle and the cold aisle so that the hot aisles and the cold aisle communicate with each other instead of partitioning the hot aisle and the cold aisle for each aisle. By doing so, the air conditioning system described in Patent Document 2 can automatically maintain the balance of the air volume due to the static pressure difference even when the rack-type cooling device fails.
特開２０１２－０９２９９９号公報JP 2012-092999 A 特開２０１４－１５６９８１号公報JP 2014-156981 A
　しかし、各冷却装置の運転状態を変えると、コールドアイル及びホットアイルの風量バランスが崩れる可能性がある。その場合、ホットアイルの高温空気が他のアイルへ流出し、機器が高温空気を吸い込んでしまうおそれがある。また、特許文献２に記載の冷却システムのように、局所冷却方式と床吹出し方式を併用する場合、低温空気をコールドアイルに供給するための床下空間が必要となる。これにより、特許文献２に記載の冷却システムは、イニシャルコストが高くなるだけでなく、局所冷却方式と床吹出し方式との併用運転中は局所冷却方式のみで冷却運転を行った場合に比べて省エネ性が損なわれるおそれがある。 However, if the operating state of each cooling device is changed, the air volume balance between cold aisle and hot aisle may be lost. In that case, the hot aisle hot air may flow out to other aisles and the equipment may inhale the hot air. Moreover, like the cooling system of patent document 2, when using a local cooling system and a floor blowing system together, the underfloor space for supplying low temperature air to a cold aisle is needed. As a result, the cooling system described in Patent Document 2 not only increases the initial cost, but also saves energy compared to the case where the cooling operation is performed only by the local cooling method during the combined operation of the local cooling method and the floor blowing method. May be impaired.
　このような背景に鑑みて本発明がなされたのであり、本発明は、最適な冷却システムの運用を課題とする。 The present invention has been made in view of such a background, and the present invention has an object to operate an optimum cooling system.
　前記した課題を解決するため、本発明は、コールドアイルとホットアイルとにおける余剰風量の和が所定以下となる複数の冷却装置の運転状態を選定することを特徴とする。
　その他の解決手段については、実施形態中において記載する。 In order to solve the above-described problems, the present invention is characterized in that the operating states of a plurality of cooling devices in which the sum of the excess air volume in the cold aisle and the hot aisle is not more than a predetermined value are selected.
Other solutions will be described in the embodiments.
　本発明によれば、最適な冷却システムの運用が可能となる。 According to the present invention, an optimum cooling system can be operated.
第１実施形態に係る冷却システムの構成例における上面模式図である。It is a top surface schematic diagram in the example of composition of the cooling system concerning a 1st embodiment. 第１実施形態に係る制御装置の構成例を示す図である。It is a figure which shows the structural example of the control apparatus which concerns on 1st Embodiment. 第１実施形態に係る冷却装置の最適運転状態の選定処理の手順を示すフローチャートである。It is a flowchart which shows the procedure of the selection process of the optimal driving | running state of the cooling device which concerns on 1st Embodiment. サーバルームの構成を一般化した図である。It is the figure which generalized the structure of the server room. サーバルームにおける風量の関係を示す図である。It is a figure which shows the relationship of the air volume in a server room. （ａ）はコールドアイルにおける風量収支を示す図であり、（ｂ）はホットアイルにおける風量収支を示す図である。(A) is a figure which shows the air volume balance in a cold aisle, (b) is a figure which shows the air quantity balance in a hot aisle. 第１実施形態に係る冷却システムの別の構成例を示す図である。It is a figure which shows another structural example of the cooling system which concerns on 1st Embodiment. 第１実施形態に係る冷却システムの別の構成例において、冷却装置に故障が発生したときを示す図である。In another example of composition of a cooling system concerning a 1st embodiment, it is a figure showing when a failure has occurred in a cooling device. 第２実施形態に係る冷却システムの上面模式図である。It is an upper surface schematic diagram of the cooling system which concerns on 2nd Embodiment. 第２実施形態に係る冷却システムの斜視図である。It is a perspective view of the cooling system which concerns on 2nd Embodiment.
　次に、本発明を実施するための形態（「実施形態」という）について、適宜図面を参照しながら詳細に説明する。 Next, modes for carrying out the present invention (referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate.
［第１実施形態］
（システム構成）
　図１は、第１実施形態に係る冷却システムの構成例における上面模式図である。
　本実施形態に係る冷却システム１０には、図１に示すように、前面から低温空気を吸い込み、背面から高温空気を排気する機器４を収納しているラック５が複数設置されている。また、冷却装置３はラック型冷却装置であり、ラック５の近傍に配置され、ラック５内におけるサーバ等の機器４を局所的に冷却している。以下、紙面縦方向を列と称する。図１において、図が煩雑になるのを防ぐため、機器４は１つしか示していないが、実際には複数の機器４が、各ラック５内に収納されている。
　機器４を収納しているラック５及び冷却装置３は、部屋であるサーバルーム１１内に設置されている。 [First Embodiment]
(System configuration)
FIG. 1 is a schematic top view of a configuration example of a cooling system according to the first embodiment.
As shown in FIG. 1, the cooling system 10 according to the present embodiment is provided with a plurality of racks 5 that house devices 4 that suck in low-temperature air from the front and exhaust high-temperature air from the back. The cooling device 3 is a rack-type cooling device, and is disposed in the vicinity of the rack 5 to locally cool the devices 4 such as servers in the rack 5. Hereinafter, the vertical direction of the drawing is referred to as a column. In FIG. 1, only one device 4 is shown in order to prevent the drawing from being complicated, but actually, a plurality of devices 4 are housed in each rack 5.
The rack 5 storing the equipment 4 and the cooling device 3 are installed in a server room 11 which is a room.
　一続きになっているラック５の列をラック列２と称する。なお、ラック列２には、冷却装置３が含まれている。同じ列では同方向となる配置されるとともに、ラック列２において、各ラック５（機器４）は、吸込面及び排気面が同方向を向くよう配置されている（冷却装置３の吸排気については後記）。また、ラック列２同士は、ラック５の吸込面同士及び排気面同士が対向するよう配置される。これにより、吸込面同士で挟まれた空間がコールドアイル６となり、排気面同士で挟まれた空間がホットアイル７となる。なお、図１では、高温空気を黒矢印、低温空気を白矢印で示している。
　冷却装置３は、ホットアイル７の高温空気を吸い込んで、この高温空気を冷却し、コールドアイル６に低温空気を供給する。 A continuous row of racks 5 is referred to as a rack row 2. The rack row 2 includes a cooling device 3. In the same row, they are arranged in the same direction, and in the rack row 2, each rack 5 (device 4) is arranged so that the suction surface and the exhaust surface face in the same direction (for the intake and exhaust of the cooling device 3). (Postscript). Further, the rack rows 2 are arranged such that the suction surfaces and the exhaust surfaces of the rack 5 face each other. Thereby, the space between the suction surfaces becomes the cold aisle 6, and the space between the exhaust surfaces becomes the hot aisle 7. In FIG. 1, high temperature air is indicated by black arrows and low temperature air is indicated by white arrows.
The cooling device 3 sucks in the high-temperature air of the hot aisle 7, cools the high-temperature air, and supplies low-temperature air to the cold aisle 6.
　また、冷却システム１０には各冷却装置３の運転状態からコールドアイル６とホットアイル７の風量を演算し、最適な冷却装置３の運転状態を探索する制御装置（空調制御装置１が設置されている。 Further, the cooling system 10 is provided with a control device (the air conditioning control device 1) that calculates the air volume of the cold aisle 6 and the hot aisle 7 from the operating state of each cooling device 3 and searches for the optimal operating state of the cooling device 3. Yes.
　制御装置１は、破線で示されるように各冷却装置３に接続されており、冷却装置３による風量のバランスが適切となるように冷却装置３の運転状態を制御する。
　なお、図１における一点鎖線はサーバルーム１１の壁を示している。 The control device 1 is connected to each cooling device 3 as indicated by a broken line, and controls the operating state of the cooling device 3 so that the air volume balance by the cooling device 3 is appropriate.
Note that the alternate long and short dash line in FIG. 1 indicates the wall of the server room 11.
（制御装置の構成）
　図２は、第１実施形態に係る制御装置の構成例を示す図である。適宜、図１を参照する。
　制御装置１は、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｅｓｓ　Ｍｅｍｏｒｙ）等のメモリ１１０、ＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｃｅｓｓｉｎｇ　Ｕｎｉｔ）１２０、ＨＤ（Ｈａｒｄ　Ｄｉｓｋ）等の記憶装置１３０及び送受信装置１４０を有している。
　記憶装置１３０に格納されているプログラムが、メモリ１１０に展開され、ＣＰＵ１２０によって実行されることで、処理部１１１が具現化しているとともに、処理部１１１を構成する運転状態選定部１１２、風量収支算出部１１３、運転係数算出部１１４、最適運転状態選定部１１５及び冷却装置制御部１１６が具現化している。 (Configuration of control device)
FIG. 2 is a diagram illustrating a configuration example of the control device according to the first embodiment. Reference is made to FIG. 1 as appropriate.
The control device 1 includes a memory 110 such as a RAM (Random Access Memory), a CPU (Central Processing Unit) 120, a storage device 130 such as an HD (Hard Disk), and a transmission / reception device 140.
The program stored in the storage device 130 is expanded in the memory 110 and executed by the CPU 120, so that the processing unit 111 is embodied, and the operation state selection unit 112 constituting the processing unit 111, the air flow balance calculation. The unit 113, the operation coefficient calculation unit 114, the optimum operation state selection unit 115, and the cooling device control unit 116 are embodied.
　運転状態選定部（運転状態探索部）１１２は、冷却装置３の運転状態を選定する。
　風量収支算出部（運転状態探索部）１１３は、運転状態選定部１１２が選定した冷却装置３の運転状態において、各コールドアイル６及び各ホットアイル７における吸込風量及び排出風量の収支である風量収支を算出する。
　運転係数算出部（運転状態探索部）１１４は、風量収支算出部１１３が算出した風量収支に基づいて運転係数を算出する。
　最適運転状態選定部（運転状態探索部）１１５は、算出した運転係数が所定以下の（ここでは最も小さくなる）冷却装置３の運転状態を選定する。
　冷却装置制御部１１６は、最適運転状態選定部１１５が選定した冷却装置３の運転状態となるよう、各冷却装置３を制御する。 The operation state selection unit (operation state search unit) 112 selects the operation state of the cooling device 3.
The air volume balance calculating unit (operating state searching unit) 113 is an air volume balance that is a balance of the intake air amount and the exhaust air amount in each cold aisle 6 and each hot aisle 7 in the operation state of the cooling device 3 selected by the operation state selecting unit 112. Is calculated.
The operation coefficient calculation unit (operation state search unit) 114 calculates an operation coefficient based on the air volume balance calculated by the air volume balance calculation unit 113.
The optimum operation state selection unit (operation state search unit) 115 selects the operation state of the cooling device 3 in which the calculated operation coefficient is equal to or less than a predetermined value (smallest here).
The cooling device control unit 116 controls each cooling device 3 so as to be in the operation state of the cooling device 3 selected by the optimum operation state selection unit 115.
（フローチャート）
　図３は、第１実施形態に係る冷却装置の最適運転状態の選定処理の手順を示すフローチャートである。適宜、図１及び図２を参照する。
　まず、運転状態選定部１１２は、冷却装置３の運転状態の組み合わせを１つ選定する（Ｓ１０１）。
　次に、風量収支算出部１１３は、各ラック列２においてラック５に格納されている機器４が吸い込む風量と、機器４が排出する風量との総和である機器総風量を算出する（Ｓ１０２）。ステップＳ１０２の処理は、後記して説明する。
　そして、風量収支算出部１１３は、各ラック列２において冷却装置３が吸い込む風量と、冷却装置３が排出する風量との総和である冷却装置総風量を算出する（Ｓ１０３）。ステップＳ１０３の処理は、後記して説明する。 (flowchart)
FIG. 3 is a flowchart illustrating a procedure for selecting an optimum operation state of the cooling device according to the first embodiment. Reference is made to FIGS. 1 and 2 as appropriate.
First, the operation state selection unit 112 selects one combination of operation states of the cooling device 3 (S101).
Next, the air volume balance calculating unit 113 calculates a total device air volume that is the sum of the air volume sucked by the device 4 stored in the rack 5 in each rack row 2 and the air volume discharged by the device 4 (S102). The process of step S102 will be described later.
Then, the air volume balance calculation unit 113 calculates the cooling device total air volume that is the sum of the air volume sucked by the cooling device 3 and the air volume discharged by the cooling device 3 in each rack row 2 (S103). The process of step S103 will be described later.
　続いて、風量収支算出部１１３は、算出した機器総風量及び冷却装置総風量を基に、コールドアイル６における風量の収支であるコールドアイル風量収支を算出する（Ｓ１０４）。
　そして、風量収支算出部１１３は、算出した機器総風量及び冷却装置総風量を基に、ホットアイル７における風量の収支であるホットアイル風量収支を算出する（Ｓ１０５）。ステップＳ１０４及びステップＳ１０５の処理は後記して説明する。 Subsequently, the air volume balance calculating unit 113 calculates a cold aisle air volume balance, which is an air volume balance in the cold aisle 6, based on the calculated total device air volume and cooling device total air volume (S104).
And the air volume balance calculation part 113 calculates the hot aisle air volume balance which is the air volume balance in the hot aisle 7 based on the calculated apparatus total air volume and cooling device total air volume (S105). The processing of step S104 and step S105 will be described later.
　次に、運転係数算出部１１４は、ステップＳ１０４で算出したコールドアイル風量収支及びステップＳ１０５で算出したホットアイル風量収支を基に、運転係数を算出する（Ｓ１０６）。ステップＳ１０６の処理は後記して説明する。運転係数の算出後、運転係数算出部１１４は算出した運転係数を、処理対象となっている冷却装置３の運転状態の組み合わせの情報とともに記憶装置１３０に一次保存する。 Next, the operation coefficient calculation unit 114 calculates an operation coefficient based on the cold aisle air volume balance calculated in step S104 and the hot aisle air volume balance calculated in step S105 (S106). The process of step S106 will be described later. After the operation coefficient is calculated, the operation coefficient calculation unit 114 primarily stores the calculated operation coefficient in the storage device 130 together with information on the combination of operation states of the cooling device 3 that is the processing target.
　続いて、運転状態選定部１１２は、冷却装置３の運転状態のすべての組み合わせについて運転係数の算出が完了したか否かを判定する（Ｓ１０７）。
　ステップＳ１０７の結果、すべての組み合わせについて運転係数の算出が完了していない場合（Ｓ１０７→Ｎｏ）、運転状態選定部１１２はステップＳ１０１へ処理を戻す。
　ステップＳ１０７の結果、すべての組み合わせについて運転係数を算出している場合（Ｓ１０７→Ｙｅｓ）、最適運転状態選定部１１５が、運転係数が最も小さい運転状態である最適運転状態を選定する（Ｓ１０８）。
　そして、冷却装置制御部１１６は、最適運転状態選定部１１５が選定した冷却装置３の運転状態となるよう、各冷却装置３を制御する（Ｓ１０９）。具体的には、冷却装置制御部１１６が、ステップＳ１０８で選定された最適運転状態となるよう、各冷却装置３のＯＮ・ＯＦＦを制御したり、風量を調整したりする。 Subsequently, the operation state selection unit 112 determines whether or not the calculation of the operation coefficient has been completed for all combinations of the operation states of the cooling device 3 (S107).
As a result of step S107, when calculation of the operation coefficient is not completed for all combinations (S107 → No), the operation state selection unit 112 returns the process to step S101.
As a result of step S107, when the operation coefficient is calculated for all combinations (S107 → Yes), the optimum operation state selection unit 115 selects the optimum operation state that is the operation state having the smallest operation coefficient (S108).
And the cooling device control part 116 controls each cooling device 3 so that it may be in the driving | running state of the cooling device 3 which the optimal driving | running state selection part 115 selected (S109). Specifically, the cooling device control unit 116 controls ON / OFF of each cooling device 3 and adjusts the air volume so that the optimum operation state selected in step S108 is obtained.
　以下、制御装置１による最適運転状態の選定処理について詳細に説明する。適宜、図１及び図２を参照する。
　図４は、風量算出の説明のため、図１に示すサーバルームの構成を一般化した図である。
　なお、図４では機器４（図１）が収納されているラック５と冷却装置３との区別を図示省略している。 Hereinafter, the selection process of the optimal operation state by the control device 1 will be described in detail. Reference is made to FIGS. 1 and 2 as appropriate.
FIG. 4 is a generalized diagram of the configuration of the server room shown in FIG. 1 for the description of the air volume calculation.
In FIG. 4, the distinction between the rack 5 in which the device 4 (FIG. 1) is stored and the cooling device 3 is omitted.
（機器総風量及び冷却装置総風量の算出）
　まず、図３のステップＳ１０２における機器総風量の算出及びステップＳ１０３における冷却装置総風量の算出について、図４及び図５を参照して、詳細に説明する。
　図４に示すように、各ラック列２は（ｎ，ｍ）で位置が示されている。このうち、ｎは紙面上下方向に対する位置を示している。すなわち、紙面上方から・・・ｎ－１，ｎ，ｎ＋１・・・となる。また、ｍは紙面左右方向に対する位置を示している。すなわち、紙面左方向から・・・ｍ－１、ｍ、ｍ＋１・・・となる。なお、ｎを行、ｍを列と称することがある。行及び列の総数は、Ｎ×Ｍであるものとする。 (Calculation of total device air volume and cooling device total air volume)
First, the calculation of the equipment total air volume in step S102 of FIG. 3 and the calculation of the cooling device total air volume in step S103 will be described in detail with reference to FIG. 4 and FIG.
As shown in FIG. 4, the position of each rack row 2 is indicated by (n, m). Among these, n indicates the position with respect to the vertical direction of the paper. That is, from the top of the page,..., N-1, n, n + 1. In addition, m indicates a position with respect to the left and right direction on the paper surface. That is, m−1, m, m + 1. In some cases, n is referred to as a row and m is referred to as a column. Assume that the total number of rows and columns is N × M.
　コールドアイル６及びホットアイル７も同様に（ｎ，ｍ）で位置が示されている。コールドアイル６及びホットアイル７においても、ｎは紙面上下方向に対する位置を示しており、ｍは紙面左右方向に対する位置を示している。
　紙面上下方向に関しては、ｎの値が１つずつ変化しているが（・・・ｎ－１，ｎ，ｎ＋１・・・）、紙面左右方向に関しては、コールドアイル及６びホットアイル７が交互に配置されているため２つずつ変化している（・・・ｍ、ｍ＋２・・・）。 The positions of the cold aisle 6 and the hot aisle 7 are similarly indicated by (n, m). Also in the cold aisle 6 and the hot aisle 7, n indicates a position with respect to the vertical direction of the paper surface, and m indicates a position with respect to the horizontal direction of the paper surface.
In the vertical direction of the paper, the value of n changes one by one (... n-1, n, n + 1 ...), but in the horizontal direction of the paper, cold aisle and 6 hot aisles 7 alternate. Are changed two by two (..., M + 2...).
　図５は、図４に示すサーバルームにおける風量の関係を示す図である。
　ここで、ラック列（ｎ，ｍ）に注目すると、ラック列（ｎ，ｍ）における機器４がコールドアイル（ｎ，ｍ）から低温空気を吸い込み、ホットアイル（ｎ，ｍ）へ高温空気を排出する。これを、機器総風量Ｑｊ，ｎ，ｍとする。すなわち、Ｑｊ，ｎ，ｍは、あるラック列２におけるラック５に収納されているすべての機器４が吸入及び排出する空気の風量である。 FIG. 5 is a diagram showing the relationship of the air volume in the server room shown in FIG.
Here, paying attention to the rack row (n, m), the equipment 4 in the rack row (n, m) sucks the cold air from the cold aisle (n, m) and discharges the hot air to the hot aisle (n, m). To do. This is the total equipment air volume Q j, n, m . That is, Q j, n, m is the air volume of air that is sucked and discharged by all the devices 4 housed in the rack 5 in a certain rack row 2.
　また、ラック列（ｎ，ｍ）における冷却装置３がホットアイル（ｎ，ｍ）から高温空気を吸い込み、コールドアイル（ｎ，ｍ）へ低温空気を排出する。これを、冷却装置総風量Ｑｋ，ｎ，ｍとする。すなわち、Ｑｋ，ｎ，ｍは、あるラック列２におけるすべての冷却装置３が吸入及び排出する空気の風量である。なお、コールドアイル（ｎ，ｍ）におけるｑｎ，ｍ及びｑｎ＋１，ｍについては後記する。
　風量収支算出部１１３は、すべてのラック列２に対して、Ｑｊ，ｎ，ｍ及びＱｋ，ｎ，ｍを算出する。 Further, the cooling device 3 in the rack row (n, m) sucks high-temperature air from the hot aisle (n, m) and discharges low-temperature air to the cold aisle (n, m). This is the total cooling device air volume Q k, n, m . That is, Q k, n, m is the air volume of the air sucked and discharged by all the cooling devices 3 in a certain rack row 2. Note that q n, m and q n + 1, m in cold aisle (n, m) will be described later.
The air volume balance calculating unit 113 calculates Q j, n, m and Q k, n, m for all rack rows 2.
　このような機器総風量及び冷却装置総風量は、予め入力されている各機器４のスペックや、冷却装置３のスペック等を基に、風量収支算出部１１３によって算出される。
　ここまでが、図３におけるステップＳ１０２及びステップＳ１０３の処理である。 The total air volume of the equipment and the total air volume of the cooling device are calculated by the air volume balance calculation unit 113 based on the specifications of each device 4 input in advance, the specifications of the cooling device 3, and the like.
The processing up to this point is the processing of step S102 and step S103 in FIG.
（コールドアイル風量収支及びホットアイル風量収支の算出）
　次に、図３のステップＳ１０４におけるコールドアイル風量収支の算出及びステップＳ１０５におけるホットアイル風量収支の算出について詳細に説明する。
　制御装置１の風量収支算出部１１３は、各ラック列２に隣接するコールドアイル６及びホットアイル７毎に風量収支の算出を行う。
　すなわち、風量収支算出部１１３は、各コールドアイル６に隣接するラック列２の機器総風量及び冷却装置総風量を基に、各コールドアイル６の風量収支を算出する。同様に、風量収支算出部１１３は、各ホットアイル７に隣接するラック列２の機器総風量及び冷却装置総風量を基に、各ホットアイル７の風量収支を算出する。 (Calculation of cold aisle air volume balance and hot aisle air volume balance)
Next, the calculation of the cold aisle air volume balance in step S104 of FIG. 3 and the calculation of the hot aisle air volume balance in step S105 will be described in detail.
The air volume balance calculation unit 113 of the control device 1 calculates the air volume balance for each cold aisle 6 and hot aisle 7 adjacent to each rack row 2.
That is, the air volume balance calculating unit 113 calculates the air volume balance of each cold aisle 6 based on the total equipment air volume and the cooling device total air volume of the rack row 2 adjacent to each cold aisle 6. Similarly, the air volume balance calculating unit 113 calculates the air volume balance of each hot aisle 7 based on the total equipment air volume and the cooling device total air volume of the rack row 2 adjacent to each hot aisle 7.
　このことを、図６を参照して説明する。
（コールドアイル風量収支）
　図６（ａ）は、図５のコールドアイル（ｎ，ｍ）における風量収支を示す図である。
　図６（ａ）において、Ｑｊ，ｎ，ｍ－１は、コールドアイル（ｎ，ｍ）からラック列（ｎ，ｍ－１）における機器４が吸い込む低温空気の風量である。また、Ｑｊ，ｎ，ｍは、コールドアイル（ｎ，ｍ）からラック列（ｎ，ｍ）における機器４が吸い込む低温空気の風量である。 This will be described with reference to FIG.
(Cold aisle wind balance)
Fig.6 (a) is a figure which shows the air volume balance in the cold aisle (n, m) of FIG.
In FIG. 6A , Q j, n, m-1 is the air volume of the low-temperature air sucked by the equipment 4 in the rack row (n, m-1) from the cold aisle (n, m). Q j, n, m is the air volume of the low-temperature air sucked by the device 4 in the rack row (n, m) from the cold aisle (n, m).
　そして、Ｑｋ，ｎ，ｍ－１は、ラック列（ｎ，ｍ－１）における冷却装置３がコールドアイル（ｎ，ｍ）へ排出する低温空気の風量である。同様に、Ｑｋ，ｎ，ｍは、ラック列（ｎ，ｍ）における冷却装置３がコールドアイル（ｎ，ｍ）へ排出する低温空気の風量である。 Q k, n, m−1 is the air volume of the low-temperature air discharged from the cooling device 3 in the rack row (n, m−1) to the cold aisle (n, m). Similarly, Q k, n, m is the air volume of the low-temperature air discharged from the cooling device 3 in the rack row (n, m) to the cold aisle (n, m).
　また、ｑｎ，ｍは、コールドアイル（ｎ，ｍ）に隣接するコールドアイル（ｎ－１，ｍ）との間でやりとりされる低温空気の風量である。同様に、ｑｎ＋１，ｍは、コールドアイル（ｎ，ｍ）に隣接するコールドアイル（ｎ＋１，ｍ）との間でやりとりされる低温空気の風量である。 Further, q n, m is the air volume of the low-temperature air exchanged with the cold aisle (n−1, m) adjacent to the cold aisle (n, m). Similarly, q n + 1, m is the air volume of low-temperature air exchanged with the cold aisle (n + 1, m) adjacent to the cold aisle (n, m).
　コールドアイル（ｎ，ｍ）における風量収支ＱＣ，ｎ，ｍは、コールドアイル（ｎ，ｍ）に隣接するラック列（ｎ，ｍ－１）及びラック列（ｎ，ｍ）に対する機器総風量及び冷却装置総風量の総和であるので、以下の式（１）で表される。 The air volume balance QC , n, m in the cold aisle (n, m) is the total equipment air flow for the rack row (n, m-1) and the rack row (n, m) adjacent to the cold aisle (n, m) and Since it is the sum total of the cooling device total air volume, it is expressed by the following equation (1).
　ＱＣ，ｎ，ｍ＝Ｑｋ，ｎ，ｍ－１＋Ｑｋ，ｎ，ｍ－Ｑｊ，ｎ，ｍ－１－Ｑｊ，ｎ，ｍ　・・・　（１） Q C, n, m = Q k, n, m-1 + Q k, n, m -Q j, n, m-1 -Q j, n, m ··· (1)
　ここで、コールドアイル（ｎ，ｍ）に流入する空気の風量を正、コールドアイル（ｎ，ｍ）から流出する空気の風量を負としている。
　コールドアイル（ｎ，ｍ）における風量の過不足分は、隣接するコールドアイル（ｎ－ｌ、ｍ）及びコールドアイル（ｎ＋１、ｍ）との間でやり取りされる低温空気の風量となる。従って、式（１）は、コールドアイル（ｎ，ｍ）とコールドアイル（ｎ－１，ｍ）との間でやりとりされる低温空気の風量ｑｎ，ｍ、及び、コールドアイル（ｎ，ｍ）とコールドアイル（ｎ＋１，ｍ）との間でやりとりされる低温空気の風量ｑｎ＋１，ｍを考慮して、以下の式（２）のように表わされる。 Here, the air volume flowing into the cold aisle (n, m) is positive, and the air volume flowing out from the cold aisle (n, m) is negative.
The excess and deficiency of the air volume in the cold aisle (n, m) is the air volume of the low-temperature air exchanged between the adjacent cold aisle (n-1, m) and the cold aisle (n + 1, m). Therefore, the expression (1) is expressed by the following equation: The air volume q n, m of cold air exchanged between the cold aisle (n, m) and the cold aisle (n-1, m) and the cold aisle (n, m) In consideration of the air volume q n + 1, m of the low-temperature air exchanged between and the cold aisle (n + 1, m), it is expressed as the following equation (2).
　ＱＣ，ｎ，ｍ＝ｑｎ，ｍ＋ｑｎ＋１，ｍ
　　　　　＝Ｑｋ，ｎ，ｍ－１＋Ｑｋ，ｎ，ｍ－Ｑｊ，ｎ，ｍ－１－Ｑｊ，ｎ，ｍ　・・・　（２） Q C, n, m = q n, m + q n + 1, m
= Q k, n, m-1 + Q k, n, m -Q j, n, m-1 -Q j, n, m (2)
（ホットアイル風量収支）
　次に、ホットアイル７における風量収支について説明する。
　図６（ｂ）は、図５のホットアイル（ｎ，ｍ）における風量収支を示す図である。
　図６（ｂ）において、Ｑｊ，ｎ，ｍは、ラック列（ｎ，ｍ）における機器４がホットアイル（ｎ，ｍ）へ排出する高温空気の風量である。また、Ｑｊ，ｎ，ｍ＋１は、ラック列（ｎ，ｍ＋１）における機器がホットアイル（ｎ，ｍ）へ排出する高温空気の風量である。 (Hot Isle Air Volume Balance)
Next, the air volume balance in the hot aisle 7 will be described.
FIG.6 (b) is a figure which shows the air volume balance in the hot aisle (n, m) of FIG.
In FIG. 6B, Q j, n, m is the air volume of the high-temperature air discharged from the equipment 4 in the rack row (n, m) to the hot aisle (n, m). Further, Q j, n, m + 1 is the air volume of the high-temperature air discharged from the devices in the rack row (n, m + 1) to the hot aisle (n, m).
　そして、Ｑｋ，ｎ，ｍは、ラック列（ｎ，ｍ）における冷却装置３がホットアイル（ｎ，ｍ）から吸い込む高温空気の風量である。同様に、Ｑｋ，ｎ，ｍ＋１は、ラック列（ｎ，ｍ＋１）における冷却装置３がホットアイル（ｎ，ｍ）から吸い込む高温空気の風量である。 Q k, n, m is the air volume of the high-temperature air that the cooling device 3 in the rack row (n, m) sucks from the hot aisle (n, m). Similarly, Q k, n, m + 1 is the air volume of the high-temperature air that the cooling device 3 in the rack row (n, m + 1) sucks from the hot aisle (n, m).
　ホットアイル（ｎ，ｍ）における風量収支ＱＨ，ｎ，ｍは、ホットアイル（ｎ，ｍ）に隣接するラック列（ｎ，ｍ）及びラック列（ｎ，ｍ＋１）に対する機器総風量及び冷却装置総風量の総和であるので、以下の式（３）で表される。 The air volume balance Q H, n, m in the hot aisle (n, m) is the equipment total air volume and the cooling device for the rack row (n, m) and the rack row (n, m + 1) adjacent to the hot aisle (n, m). Since it is the sum total of the total air volume, it is expressed by the following equation (3).
　ＱＨ，ｎ，ｍ＝Ｑｊ，ｎ，ｍ＋Ｑｊ，ｎ，ｍ＋１－Ｑｋ，ｎ，ｍ－Ｑｋ，ｎ，ｍ－１　・・・　（３） QH , n, m = Qj, n, m + Qj, n, m + 1- Qk , n, m- Qk , n, m-1 (3)
　なお、ホットアイル（ｎ，ｍ）に流入する空気の風量を正、ホットアイル（ｎ，ｍ）から流出する空気の風量を負としている。
　ここで、ホットアイル７に供給される風量が、ホットアイル７から排出される風量より過剰であると、高温空気の風量がコールドアイル６に流出し、機器４が高温空気の風量を吸い込むおそれがある。従って、ホットアイル（ｎ，ｍ）における風量収支ＱＨ，ｎ，ｍは以下の式（４）の条件を満たさなくてはならない。 Note that the air volume flowing into the hot aisle (n, m) is positive, and the air volume flowing out from the hot aisle (n, m) is negative.
Here, if the air volume supplied to the hot aisle 7 is excessive than the air volume discharged from the hot aisle 7, the air volume of the high-temperature air may flow into the cold aisle 6, and the device 4 may suck the air volume of the high-temperature air. is there. Therefore, the air volume balance Q H, n, m in the hot aisle (n, m) must meet the conditions of the following equation (4).
　ＱＨ，ｎ，ｍ＝Ｑｊ，ｎ，ｍ＋Ｑｊ，ｎ，ｍ＋１－Ｑｋ，ｎ，ｍ－Ｑｋ，ｎ，ｍ－１≦０　・・・　（４） QH , n, m = Qj, n, m + Qj, n, m + 1- Qk , n, m- Qk , n, m- 1≤0 (4)
　ここまでが、図３におけるステップＳ１０４及びステップＳ１０５の処理である。
　なお、Ｑｊ，ｎ，０、Ｑｊ，ｎ，Ｍ、Ｑｊ，０，ｍ、Ｑｊ，Ｎ，ｍ、Ｑｋ，ｎ，０、Ｑｋ，ｎ，Ｍ、Ｑｋ，０，ｍ、Ｑｋ，Ｎ，ｍ、ｑ１、ｍ、ｑＮ＋１，ｍは、サーバルーム１１の壁における風量となり、いずれも値は０である。 The processing up to this point is the processing of step S104 and step S105 in FIG.
Qj, n, 0 , Qj, n, M , Qj, 0, m , Qj, N, m , Qk, n, 0 , Qk, n, M , Qk, 0, m , Qk, N, m , q1 , m , qN + 1, m are the air volumes at the wall of the server room 11, and all have values of zero.
（運転係数算出及び最適運転状態選定）
　次に、図３のステップＳ１０６における運転係数の算出及びステップＳ１０８における最適運転状態の選定について詳細に説明する。
　運転係数算出部１１４は、算出された各コールドアイル６及び各ホットアイル７で算出された風量収支から余剰風量を表す運転係数を算出し、運転係数が最小となる冷却装置３の状態の組み合わせを選定する。 (Calculation of operating coefficient and selection of optimum operating condition)
Next, calculation of the operation coefficient in step S106 of FIG. 3 and selection of the optimum operation state in step S108 will be described in detail.
The operation coefficient calculation unit 114 calculates an operation coefficient representing the surplus air volume from the air volume balance calculated in each cold aisle 6 and each hot aisle 7 and calculates the combination of the states of the cooling device 3 that minimizes the operation coefficient. Select.
　ラック列２がＮ×Ｍの構成を有しているとすると、最適な冷却運転を行う場合、コールドアイル６の風量収支は、ラック列（１，ｍ）からラック列（Ｎ，ｍ）までの総和が最小になり、かつ、その絶対値は、ラック列（ｎ，１）からラック列（ｎ，Ｍ）までの総和が最小になることが必要である。
　従って、コールドアイル６における運転係数は、以下の式（５）で表わされるコールドアイル運転係数θＣが最小となる冷却装置３の運転状態である。 Assuming that the rack row 2 has an N × M configuration, when performing an optimal cooling operation, the air volume balance of the cold aisle 6 is from the rack row (1, m) to the rack row (N, m). It is necessary that the sum is minimized, and the absolute value of the sum is from the rack row (n, 1) to the rack row (n, M).
Therefore, the operating coefficient in the cold aisle 6 is the operating state of the cooling device 3 in which the cold aisle operating coefficient θ C expressed by the following equation (5) is minimized.
Figure JPOXMLDOC01-appb-M000001
Figure JPOXMLDOC01-appb-M000001
　なお、ＱＣ，ｎ，２ｓ＝０（ｓ＝１，２，・・・）である。
　式（５）は、コールドアイル６が連なっている列において、コールドアイル６における風量収支を加算し、加算した結果の絶対値を、列毎に加算したものである。
　また、最適な冷却運転を行う場合、ホットアイル７の風量収支は、ラック列（１，ｍ）からラック列（Ｎ，ｍ）までの絶対値の総和が最小になり、かっ、ラック列（ｎ，１）からラック列（ｎ，Ｍ）までの総和が最小になることが必要である。
　従って、ホットアイル７における運転係数は、以下の式（６）で表わされるホットアイル運転係数θＨが最小となる冷却装置３の運転状態である。 Incidentally, Q C, n, 2s = 0 (s = 1,2, ···) it is.
Expression (5) is obtained by adding the air volume balance in the cold aisle 6 in the column where the cold aisle 6 is connected, and adding the absolute value of the addition result for each column.
Further, when performing the optimum cooling operation, the air volume balance of the hot aisle 7 has the smallest sum of absolute values from the rack row (1, m) to the rack row (N, m), and the rack row (n , 1) to the rack row (n, M) must be minimized.
Therefore, the operation coefficient in the hot aisle 7 is a driving state of the cooling device 3 that hot aisle operation coefficient theta H is minimized, which is represented by the following formula (6).
Figure JPOXMLDOC01-appb-M000002
Figure JPOXMLDOC01-appb-M000002
　なお、ＱＨ，ｎ，２ｓ＝０（ｓ＝１，２，・・・）である。
　式（６）は、各ホットアイル７における風量収支の絶対値の総和である。
　ちなみに、各運転係数θＣ，θＨは、コールドアイル６及びホットアイル７における余剰風量である。
　運転係数算出部１１４は、式（５）によるコールドアイル運転係数θＣと、式（６）によるホットアイル運転係数θＨの和である式（７）で表される運転係数θを算出する。 Q H, n, 2s = 0 (s = 1, 2,...).
Formula (6) is the sum total of the absolute value of the air volume balance in each hot aisle 7.
Incidentally, each operation coefficient θ C , θ H is a surplus air volume in the cold aisle 6 and the hot aisle 7.
The operation coefficient calculation unit 114 calculates the operation coefficient θ represented by Expression (7), which is the sum of the cold aisle operation coefficient θ C according to Expression (5) and the hot aisle operation coefficient θ H according to Expression (6).
　θ＝θＣ＋θＨ　・・・　（７） θ = θ C + θ H (7)
　具体的には、運転係数算出部１１４は、各冷却装置３の稼働状態の組み合わせに関する機器風量、冷却装置風量を基に、コールドアイル運転係数θＣ、ホットアイル運転係数θＨ及び運転係数θを算出する。そして、最適運転状態選定部１１５が、図３のステップＳ１０８において、運転係数θが最小となるような冷却装置３の稼働状態の組み合わせを特定する。
　このようにして、制御装置１は、最適な冷却装置３の稼働状態を探索し、選定する。 Specifically, the operation coefficient calculation unit 114 calculates the cold aisle operation coefficient θ C , the hot aisle operation coefficient θ H, and the operation coefficient θ based on the equipment air volume and the cooling apparatus air volume related to the combination of operating states of the respective cooling devices 3. calculate. Then, the optimum operation state selection unit 115 identifies the combination of operation states of the cooling device 3 that minimizes the operation coefficient θ in step S108 of FIG.
In this way, the control device 1 searches for and selects the optimum operating state of the cooling device 3.
　ここで、運転係数の算出を行う際に使用する機器４の風量や、冷却装置３の風量は実際の運転風量を測定して使用してもよいし、消費電力や空気温度を測定して風量を予測して使用してもかまわない。また、機器４及び冷却装置３の定格風量値を使用して、運転係数を算出してもかまわない。
　また、運転係数θが最小値となる冷却装置３の運転状態の探索は、遺伝的アルゴリズムや、局所探索法や、ニューラルネットワーク等の最適化アルゴリズムが用いられてもよい。このような最適化アルゴリズムを用いることで、冷却装置３のすべての運転状態について運転係数θが算出される必要がなくなる。 Here, the air volume of the device 4 used when calculating the operating coefficient and the air volume of the cooling device 3 may be used by measuring the actual operating air volume, or by measuring the power consumption and the air temperature. May be used in anticipation. Further, the operating coefficient may be calculated using the rated airflow values of the device 4 and the cooling device 3.
In addition, a genetic algorithm, a local search method, or an optimization algorithm such as a neural network may be used to search for the operation state of the cooling device 3 at which the operation coefficient θ is the minimum value. By using such an optimization algorithm, it is not necessary to calculate the operating coefficient θ for all operating states of the cooling device 3.
　なお、冷却装置３が「ＯＮ」、「ＯＦＦ」の２状態しか稼働状態がない場合は、どの冷却装置３を「ＯＮ」にし、どの冷却装置３を「ＯＦＦ」にすれば、運転係数θを最小にできるかを最適運転状態選定部１１５が探索する。
　冷却装置３が、稼働状態を「強」から「弱」の間で段階的に調節できるのであれば、運転係数算出部１１４は、各冷却装置３をどのような稼働状態にすれば、運転係数θを最小にできるかを算出する。
　ここまでが、図３におけるステップＳ１０６及びステップＳ１０８の処理である。 In addition, when the cooling device 3 has only two operating states of “ON” and “OFF”, which cooling device 3 is set to “ON” and which cooling device 3 is set to “OFF”, the operation coefficient θ is set. The optimum operation state selection unit 115 searches whether it can be minimized.
If the cooling device 3 can adjust the operating state in a stepwise manner from “strong” to “weak”, the operation coefficient calculation unit 114 determines the operating coefficient for each operating state of each cooling device 3. Calculate whether θ can be minimized.
The processing up to this point is the processing of step S106 and step S108 in FIG.
　本実施形態によれば、コールドアイル６とホットアイル７との風量バランスを崩すことなく省エネを実現した冷却運転が可能となる。
　また、局所冷却の構成で、省エネを実現したサーバルーム１１全体の空調が可能となるので、イニシャルコストを低減することができる。 According to the present embodiment, it is possible to perform a cooling operation that realizes energy saving without breaking the air volume balance between the cold aisle 6 and the hot aisle 7.
Further, the local cooling configuration enables air conditioning of the entire server room 11 that realizes energy saving, so that the initial cost can be reduced.
　さらに、風量収支算出部１１３が、コールドアイル６とホットアイル７とに流入する風量を正とし、コールドアイル及びホットアイルから流出する風量を負として、コールドアイル及びホットアイルにおける流入風量及び排出風量の総和である風量収支をコールドアイル及びホットアイル毎に算出する。
　そして、運転係数算出部１１４が、コールドアイルが連なっている列において、コールドアイルにおける風量収支を加算し、加算した結果の絶対値を、列毎に加算したものをコールドアイル運転係数（θＣ：コールドアイル６の余剰風量）として算出する。また、運転係数算出部１１４は、各ホットアイルにおける風量収支の絶対値の総和をホットアイル運転係数（θＨ：ホットアイル７の余剰風量）として算出する。
　さらに、運転状態選定部１１５が、コールドアイル運転係数及びホットアイル運転係数を加算したものを運転係数（θ）として算出し、該運転係数が最も小さくなる冷却装置の運転状態を探索（選定）する。
　このようにすることで、最適な運転状態の探索（選定）を定量的に行うことができる。 Further, the air volume balance calculation unit 113 sets the air volume flowing into the cold aisle 6 and the hot aisle 7 as positive, the air volume flowing out from the cold aisle and the hot aisle as negative, and the inflow air volume and the exhaust air volume in the cold aisle and the hot aisle. The total air volume balance is calculated for each cold aisle and hot aisle.
Then, the operation coefficient calculation unit 114 adds the air volume balance in the cold aisle in the column where the cold aisle is connected, and adds the absolute value of the addition result for each column to the cold aisle operation coefficient (θ C : Calculated as surplus air volume of the cold aisle 6). Further, the operation coefficient calculation unit 114, the hot aisle operation coefficient sum of the absolute values of air flow balance in the hot aisle: is calculated as (theta H excess air volume of the hot aisle 7).
Further, the operation state selection unit 115 calculates the operation coefficient (θ) by adding the cold aisle operation coefficient and the hot aisle operation coefficient, and searches for (selects) the operation state of the cooling device having the smallest operation coefficient. .
By doing in this way, search (selection) of an optimal driving | running state can be performed quantitatively.
（冷却装置が故障した場合）
　冷却装置３が故障した場合、コールドアイル６の温度上昇により機器４の故障を引き起こすおそれがある。従って、図７に示すように、コールドアイル６の温度上昇による機器４の故障を防ぐために冷却装置３の予備機（以下、予備冷却装置３ａと称する）が設置される。
　予備冷却装置３ａは、ホットアイル７に隣接する２列のラック列２を１区画とした場合
に、１区画に少なくとも１台設置されるのが好ましい。 (If the cooling device fails)
When the cooling device 3 breaks down, the temperature of the cold aisle 6 may increase, causing the device 4 to break down. Therefore, as shown in FIG. 7, a spare machine for the cooling device 3 (hereinafter referred to as the preliminary cooling device 3 a) is installed in order to prevent the failure of the device 4 due to the temperature rise of the cold aisle 6.
When the two rack rows 2 adjacent to the hot aisle 7 are defined as one section, it is preferable that at least one precooling device 3a is installed in one section.
　図８に示すように、冷却装置３１，３が１台故障した場合、故障した冷却装置３と同一区画内に設置されている予備冷却装置３２，３ａが運転されることが多い。このような場合、運転している冷却装置３の配置が変わり、コールドアイル６の風量バランスが崩れてしまうおそれがある。本実施形態によれば、前記した方法で運転係数θが最小となる冷却装置３と予備冷却装置３ａの運転状態の組み合わせを算出することで、最適な運転状態を保つことができる。これにより、冷却システム１０の信頼性を向上させることができる。 As shown in FIG. 8, when one of the cooling devices 31 and 3 fails, the preliminary cooling devices 32 and 3a installed in the same section as the failed cooling device 3 are often operated. In such a case, the arrangement of the cooling device 3 in operation may change, and the air volume balance of the cold aisle 6 may be lost. According to the present embodiment, the optimum operation state can be maintained by calculating the combination of the operation state of the cooling device 3 and the preliminary cooling device 3a that minimizes the operation coefficient θ by the above-described method. Thereby, the reliability of the cooling system 10 can be improved.
［第２実施形態］
　次に、図９及び図１０を参照して、本発明の第２実施形態について説明する。
　図９は第２実施形態に係る冷却システムの上面模式図であり、図１０は第２実施形態に係る冷却システムの斜視図である。
　図９及び図１０に示すように、冷却システム１０ａでは各ラック５の上部に天吊型の冷却装置８が設置されている。各ラック５の内部には機器４（図１）が収納されている。図９及び図１０に示すように、天吊型の冷却装置８は、ホットアイル７（図１０）の上部を完全に覆った状態となっている。天吊型の冷却装置８は、ホットアイル７に向けて開口している開口部からホットアイル７の高温空気（図１０のドット矢印）を吸い込み、内部で冷却した後、コールドアイル６（図１０）側の開口部から低温空気（図１０の白矢印）を排出する。なお、ある天吊型の冷却装置８が故障した場合、予め設置してある予備の天吊型の冷却装置が稼働するようにしてもよい。
　なお、天吊型の冷却装置８も、第１実施形態と同様、ラック５に対して冗長となるよう設置されている。 [Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 9 is a schematic top view of the cooling system according to the second embodiment, and FIG. 10 is a perspective view of the cooling system according to the second embodiment.
As shown in FIG.9 and FIG.10, in the cooling system 10a, the ceiling-mounted cooling device 8 is installed in the upper part of each rack 5. As shown in FIG. The equipment 4 (FIG. 1) is accommodated in each rack 5. As shown in FIGS. 9 and 10, the ceiling-mounted cooling device 8 is in a state of completely covering the upper part of the hot aisle 7 (FIG. 10). The ceiling-suspended cooling device 8 sucks high-temperature air (dotted arrow in FIG. 10) of the hot aisle 7 from an opening that opens toward the hot aisle 7, cools the inside, and then cools the cold aisle 6 (FIG. 10). ) Low temperature air (white arrow in FIG. 10) is discharged from the opening on the side. In addition, when a certain ceiling-suspended cooling device 8 breaks down, a spare ceiling-suspended cooling device installed in advance may be operated.
The ceiling-suspended cooling device 8 is also installed redundantly with respect to the rack 5 as in the first embodiment.
　第２実施形態では、制御装置１が前記した運転係数θを最小にする天吊型の冷却装置８の運転状態の組み合わせを算出することで、第１実施形態と同様、省エネを実現した冷却システム１０ａの運転や、天吊型の冷却装置８のいずれかが故障しても、最適な冷却システム１０ａの運転を可能とする。 In the second embodiment, the control device 1 calculates the combination of the operation states of the ceiling-mounted cooling device 8 that minimizes the operation coefficient θ described above, and thus, a cooling system that realizes energy saving, as in the first embodiment. Even if either the operation of 10a or the ceiling-mounted cooling device 8 breaks down, the optimal operation of the cooling system 10a can be performed.
　なお、第２実施形態において、制御装置１の構成は図２と同様であり、また、最適運転状態の探索・選定も第１実施形態と同様であるので、ここでは説明を省略する。 In the second embodiment, the configuration of the control device 1 is the same as that shown in FIG. 2, and the search and selection of the optimum operation state is the same as that in the first embodiment.
　本発明は前記した実施形態に限定されるものではなく、様々な変形例が含まれる。例えば、前記した実施形態は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明したすべての構成を有するものに限定されるものではない。また、ある実施形態の構成の一部を他の実施形態の構成に置き換えることが可能であり、ある実施形態の構成に他の実施形態の構成を加えることも可能である。また、各実施形態の構成の一部について、他の構成の追加・削除・置換をすることが可能である。 The present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to having all the configurations described. In addition, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.
　また、前記した各構成、機能、各部１１１～１１６、記憶装置１３０等は、それらの一部又はすべてを、例えば集積回路で設計すること等によりハードウェアで実現してもよい。また、図２に示すように、前記した各構成、機能等は、ＣＰＵ等のプロセッサがそれぞれの機能を実現するプログラムを解釈し、実行することによりソフトウェアで実現してもよい。各機能を実現するプログラム、テーブル、ファイル等の情報は、ＨＤに格納すること以外に、メモリや、ＳＳＤ（Ｓｏｌｉｄ　Ｓｔａｔｅ　Ｄｒｉｖｅ）等の記録装置、又は、ＩＣ（Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）カードや、ＳＤ（Ｓｅｃｕｒｅ　Ｄｉｇｉｔａｌ）カード、ＤＶＤ（Ｄｉｇｉｔａｌ　Ｖｅｒｓａｔｉｌｅ　Ｄｉｓｃ）等の記録媒体に格納することができる。
　また、各実施形態において、制御線や情報線は説明上必要と考えられるものを示しており、必ずしもすべての制御線や情報線を示しているとは限らない。実際には、ほとんどすべての構成が相互に接続されていると考えてよい。 Further, each of the above-described configurations, functions, the respective units 111 to 116, the storage device 130, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Further, as shown in FIG. 2, the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by a processor such as a CPU. In addition to storing the program, table, file, etc. for realizing each function, in addition to storing it in the HD, a memory, a recording device such as an SSD (Solid State Drive), an IC (Integrated Circuit) card, an SD (Secure) It can be stored in a recording medium such as a Digital) card or a DVD (Digital Versatile Disc).
Moreover, in each embodiment, the control line and the information line are those that are considered necessary for the explanation, and not all the control lines and the information lines are necessarily shown. In practice, it can be considered that almost all configurations are connected to each other.
　１　　　制御装置（空調制御装置）
　２　　　ラック列
　３，３１　冷却装置
　３ａ，３２　予備冷却装置
　４　　　機器
　５　　　ラック
　６　　　コールドアイル
　７　　　ホットアイル
　８　　　天吊型の冷却装置
　１０，１０ａ　冷却システム
　１１，１１ａ　　サーバルーム（部屋）
　１１１　処理部
　１１２　運転状態選定部（運転状態探索部）
　１１３　風量収支算出部（運転状態探索部）
　１１４　運転係数算出部（運転状態探索部）
　１１５　最適運転状態選定部（運転状態探索部）
　１１６　冷却装置制御部 1 Control device (air conditioning control device)
2 rack row 3, 31 cooling device 3a, 32 preliminary cooling device 4 equipment 5 rack 6 cold aisle 7 hot aisle 8 ceiling-mounted cooling device 10, 10a cooling system 11, 11a server room (room)
111 processing unit 112 operation state selection unit (operation state search unit)
113 Airflow balance calculation unit (operating state search unit)
114 Driving coefficient calculation unit (driving state search unit)
115 Optimal operation state selection unit (operation state search unit)
116 Cooling device controller

Claims (7)

  1. 　コールドアイル及びホットアイルを有する部屋において、機器を冷却するため設置されている複数の冷却装置を制御する空調制御装置であって、
    　前記コールドアイルの余剰風量と前記ホットアイルの余剰風量との和が所定以下となる各冷却装置の運転状態の組み合わせを算出する運転状態探索部と、
    　前記算出した冷却装置の運転状態となるよう、各冷却装置を制御する冷却装置制御部と、
    　を有することを特徴とする空調制御装置。     In a room having a cold aisle and a hot aisle, an air conditioning control device that controls a plurality of cooling devices installed to cool equipment,
    An operation state search unit for calculating a combination of operation states of the cooling devices in which the sum of the excess air volume of the cold aisle and the excess air volume of the hot aisle is equal to or less than a predetermined value;
    A cooling device controller that controls each cooling device so as to be in the calculated operating state of the cooling device;
    The air-conditioning control apparatus characterized by having.
  2. 　前記運転状態探索部は、
    　前記コールドアイル及び前記ホットアイルに流入する風量を正とし、前記コールドアイル及び前記ホットアイルから流出する風量を負として、前記コールドアイル及び前記ホットアイルにおける流入風量及び排出風量の総和である風量収支を前記コールドアイル及び前記ホットアイル毎に算出し、
    　前記コールドアイルが連なる列において、前記コールドアイルにおける風量収支を加算し、前記加算した結果の絶対値を、前記列毎に加算したものを、前記コールドアイルの余剰風量であるコールドアイル運転係数として算出し、
    　各ホットアイルにおける風量収支の絶対値の総和を、前記ホットアイルの余剰風量であるホットアイル運転係数として算出し、
    　前記コールドアイル運転係数と前記ホットアイル運転係数とを加算したものを運転係数として算出し、該運転係数が最も小さくなる冷却装置の運転状態を探索する
    　ことを特徴とする請求項１に記載の空調制御装置。     The driving state search unit
    An air volume balance that is the sum of the inflow air volume and the exhaust air volume in the cold aisle and the hot aisle, with the air volume flowing into the cold aisle and the hot aisle being positive and the air volume flowing out from the cold aisle and the hot aisle is negative. Calculate for each cold aisle and hot aisle,
    In the row where the cold aisles are connected, the air volume balance in the cold aisle is added, and the absolute value of the added result is added for each row, and is calculated as the cold aisle operating coefficient which is the excess air flow of the cold aisle. And
    The sum of absolute values of the air volume balance in each hot aisle is calculated as a hot aisle operating coefficient that is the surplus air volume of the hot aisle,
    2. The air conditioner according to claim 1, wherein a value obtained by adding the cold aisle operation coefficient and the hot aisle operation coefficient is calculated as an operation coefficient, and an operation state of the cooling device having the smallest operation coefficient is searched. Control device.
  3. 　前記運転状態探索部は、
    　前記冷却装置に故障が発生すると、前記コールドアイルの余剰風量と前記ホットアイルの余剰風量との和が最小となる冷却装置の運転状態の組み合わせを算出する
    　ことを特徴とする請求項１に記載の空調制御装置。     The driving state search unit
    The combination of the operating state of the cooling device that calculates the sum of the excess air volume of the cold aisle and the excess air volume of the hot aisle when the failure occurs in the cooling device is calculated. Air conditioning control device.
  4. 　前記運転状態探索部は、
    　前記冷却装置に故障が発生すると、予備冷却装置を稼働させた状態における、前記コールドアイルの余剰風量と前記ホットアイルの余剰風量との和が最小となる冷却装置の運転状態の組み合わせを算出する
    　ことを特徴とする請求項３に記載の空調制御装置。     The driving state search unit
    When a failure occurs in the cooling device, a combination of operating states of the cooling device that minimizes the sum of the excess air volume of the cold aisle and the excess air volume of the hot aisle in a state where the preliminary cooling device is operated is calculated. The air-conditioning control apparatus according to claim 3.
  5. 　前記冷却装置は、ラック型冷却装置である
    　ことを特徴とする請求項１から請求項４のいずれか一項に記載の空調制御装置。     The air conditioning control device according to any one of claims 1 to 4, wherein the cooling device is a rack-type cooling device.
  6. 　前記冷却装置は、天吊型の冷却装置である
    　ことを特徴とする請求項１から請求項４のいずれか一項に記載の空調制御装置。     The air-conditioning control device according to any one of claims 1 to 4, wherein the cooling device is a ceiling-mounted cooling device.
  7. 　コールドアイル及びホットアイルを有する部屋において、機器を冷却するため設置されている複数の冷却装置を制御する空調制御装置の空調制御方法であって、
    　前記コールドアイルの余剰風量と前記ホットアイルの余剰風量との和が所定以下となる各冷却装置の運転状態の組み合わせを算出し、
    　前記算出した冷却装置の運転状態となるよう、各冷却装置を制御する
    　ことを特徴とする空調制御方法。     In a room having a cold aisle and a hot aisle, an air conditioning control method of an air conditioning control device for controlling a plurality of cooling devices installed to cool equipment,
    Calculating a combination of operating states of each cooling device in which the sum of the excess air volume of the cold aisle and the excess air volume of the hot aisle is equal to or less than a predetermined value;
    Each cooling device is controlled so that it may be in the operation state of the calculated cooling device. An air-conditioning control method characterized by things.
PCT/JP2015/082983 2014-12-02 2015-11-25 Air-conditioning control device and air-conditioning control method WO2016088613A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257730A (en) * 2008-03-26 2009-11-05 Ntt Facilities Inc Rack air conditioning system
JP2010002148A (en) * 2008-06-23 2010-01-07 Ntt Facilities Inc Method of controlling linkage of air conditioning facility and ict equipment
WO2014014606A1 (en) * 2012-07-17 2014-01-23 University Of North Dakota Carbon dioxide capture and conversion to a carbamate salt and polyurea
JP2014163661A (en) * 2013-02-28 2014-09-08 Hitachi Ltd Air conditioning control device of data center

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5762646B2 (en) * 2013-04-24 2015-08-12 株式会社日立システムズ Container type data center

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009257730A (en) * 2008-03-26 2009-11-05 Ntt Facilities Inc Rack air conditioning system
JP2010002148A (en) * 2008-06-23 2010-01-07 Ntt Facilities Inc Method of controlling linkage of air conditioning facility and ict equipment
WO2014014606A1 (en) * 2012-07-17 2014-01-23 University Of North Dakota Carbon dioxide capture and conversion to a carbamate salt and polyurea
JP2014163661A (en) * 2013-02-28 2014-09-08 Hitachi Ltd Air conditioning control device of data center

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