JP5669348B2 - Electronic communication equipment room cooling system - Google Patents

Description

  The present invention relates to a cooling system for an electronic communication device room, and more particularly, to a cooling system suitable for cooling a data center room in which racks for storing electronic communication devices such as servers are collectively accommodated.

  There are two types of cooling methods: a method using cooling water as a cooling medium and a method using refrigerant gas. In the former, cooling water from a cooling source such as a cooling tower or a refrigerator is supplied to a cooling water coil which is a heat exchanger arranged in a cooling target. In the latter, the refrigerant gas compressed from the outdoor unit of the cooling system is supplied to the direct expansion cooling coil.

  In a cooling system such as a data center in which a large number of racks that accommodate electronic communication devices such as servers are collectively arranged, considering the influence of the cooling medium caused by breakage of the cooling medium line on the electronic communication devices A refrigerant system using a direct expansion cooling coil is employed (see, for example, Patent Document 1).

JP 2003-35441 A

  However, in this refrigerant system, it is necessary to individually provide an outdoor unit in which a compressor for compressing the refrigerant is provided according to the number of directly expanded cooling coils, resulting in an increase in installation space and equipment costs. In addition, there is a drawback that it is not possible to utilize the heat of cool air in the intermediate period and winter period, that is, the refrigerant compressor must be operated even if the outside air is at a low temperature.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling system for an electronic communication equipment room that can eliminate a substantial influence on the electronic communication equipment due to water leakage even if a cooling medium line is damaged.

The present invention employs a cooling system using cooling water, but instead of directly circulating cooling water between the cooling water from the cooling water source and each cooling water coil, a plurality of intermediate heats are provided between them. An exchanger is provided, primary cooling water is circulated between the heat exchanger and a cooling water source, secondary cooling water is circulated between each intermediate heat exchanger and each corresponding cooling coil, and each rack is The secondary cooling water is circulated by the operation of a corresponding pump in each of the plurality of intermediate heat exchangers or through a flow control valve provided in the heat exchanger of the cooler. It is characterized by being installed for each rack row so that the secondary cooling water circulates .

  Since the secondary cooling water is guided to each cooling coil arranged in the vicinity of the cooling target, if the secondary cooling water channel is defective, the secondary cooling water leaks out, but this secondary cooling water channel Are formed in parallel between each cooling coil and each corresponding intermediate heat exchanger. In addition, each secondary cooling water channel is separated from the primary cooling water channel by each intermediate heat exchanger.

  Therefore, even if the secondary cooling channel system is damaged, a large amount of water does not flow out of the primary cooling water system including the cooling water source such as a cooling tower, and other secondary operating normally. Cooling water from the cooling water system does not flow out. Therefore, damage to the electronic communication device due to this large amount of water leakage is prevented. In addition, the primary cooling water can be collectively cooled by a cooling water source such as a cooling tower or a refrigerator, and these can be installed in a basement or a rooftop, so that a large number of outdoor units are distributed in a room. Compared to the expansion method, it is advantageous in terms of effective use of space and equipment costs.

  In the intermediate heat exchanger, heat exchange between the primary cooling water and the secondary cooling water guided to the intermediate heat exchanger can be performed. Moreover, a cooling tower, a refrigerator, or a cooling water heat storage tank can be used as a cooling water source.

  The cooling water source can be composed of a cooling tower and a refrigerator. In this case, the outside wet bulb temperature is measured, and when the outside wet bulb temperature reaches a predetermined value, for example, 12 to 13 ° C., or when this predetermined value continues for a predetermined time, the refrigerator can be switched to the cooling tower. . By switching to this cooling tower, only the power of the watering pump and the cooling tower fan is used without using a compressor, thereby saving power. In this case, the heat medium for cooling the rack can be cooled by using the latent heat of evaporation by bringing water into contact with the outside air by watering the cooling tower.

  Each rack can be provided with an air inlet on one of the front and rear surfaces, and an air outlet on the other of the front and rear surfaces. The heat exchanger of the cooler can be disposed to face the air outlet of the rack.

  It is desirable that the heat exchanger of the cooler is arranged to face the air discharge port outside the rack in terms of securing a large cooling capacity.

  The cooler may be provided with an air exhaust that promotes exhaust air from the air exhaust port of the rack or rack row toward the heat exchanger. Thereby, the cooling effect in a rack can be heightened.

  A plurality of the racks can be arranged so that the directions of the one surface of the racks coincide with each other. In this case, it is desirable that the plurality of coolers exhibit the ability to process the total waste heat discharged from the corresponding rack row for each rack row.

  According to the present invention, as described above, a plurality of intermediate heat exchangers are provided between the cooling water source and each cooling water coil, and the primary cooling water is circulated between the heat exchanger and the cooling water source, Secondary cooling water can be circulated between each intermediate heat exchanger and each corresponding cooling coil. Thereby, damage to electronic communication equipment such as electronic communication equipment due to a large amount of water from the primary cooling water system can be prevented, and the electronic communication equipment room in which the rack for housing these is arranged can be effectively cooled. Therefore, a large number of outdoor units equipped with a compressor for compressing the cooling medium are not required, and it is possible to effectively use space and reduce equipment costs. Moreover, by using water as a refrigerant, use variations such as free cooling and heat storage increase as compared with refrigerants such as other gases.

  FIG. 1 shows a server room 12 to which an air conditioning system 10 according to the present invention is applied. In the illustrated example, the server room 12 has a space between a floor surface 12a (see FIG. 7) and a ceiling surface 12b (see FIG. 7) of a building 38 (see FIG. 4) as a pair of vertical partition walls 14a and 14b and A pair of horizontal partition walls 14c and 14d are formed in a rectangular shape. The server room 12 preferably receives the temperature-controlled outside air processing air through the air intake port 12c, and the air in the server room 12 is exhausted through the exhaust port 12d. In the illustrated example, an air intake port 12c is provided on the side of one horizontal partition wall 14c, and an exhaust port 12d is provided on the side of the other horizontal partition wall 14d facing the horizontal partition wall 14c.

  In the server room 12, a large number of racks 16 are arranged along the horizontal partition walls 14c and 14d at intervals from the partition walls 14a to 14d, respectively, and the columns are mutually connected along the vertical partition walls (14a and 14b). Are arranged so as to form columns (rows) at intervals. In the example shown in FIG. 1, each rack row (18a to 18d) is composed of seven mutually adjacent racks 16 arranged in parallel, and all rack rows are composed of four rows, that is, four rows.

  In each rack 16, electronic communication devices 20 (see FIG. 7) such as servers well known in the art are accommodated in multiple stages in the height direction. A large number of air inlets 22a (see FIG. 7) are distributed on the front surface 16a of each rack 16. Further, a large number of air discharge ports 22b (see FIG. 7) are dispersedly arranged on the rear surface 16b of each rack 16.

  Each rack 16 is arranged so that the front surface 16a of each rack 16 is aligned in one direction for each rack row. In the example shown in FIG. 1, the front surface 16a of the rack 16 is aligned in one direction in all the rack rows 18 (18a to 18d).

  Each rack row 18a to 18d is vertically connected to the inside of the server room 12 in cooperation with the partition wall 24 which is provided in parallel with the horizontal partition walls 14c and 14d and surrounds each rack row in relation to each rack row 18a to 18d. By dividing into two, the server room 12 is divided into five compartments 26 (26a to 26e). That is, the inside of the server room 12 is divided into (n + 1) compartments 26 by n rows of rack rows 18 and n rows of partition walls 24.

  In such a linear array of compartments, (n + 1) compartments are partitioned by n partitions. In this case, the number n of partitions counts one continuous area surrounding each rack row.

  In a portion of each partition wall 24 adjacent to one vertical partition wall 14a, a communication port 28 for eliminating a pressure difference between the two adjacent compartments is provided. The communication port 28 can be provided with a filter or a net for air purification. In addition, when the pressure difference between the adjacent compartments can be allowed, movable blades that rotate so as to enable the air flow in the opposite directions between the compartments can be attached to the communication port 28.

  A rack cooler 30 is disposed on the rear surface 16b of the rack 16 of each rack row (18a to 18d). Each of the coolers 30 has a rack heat exchanger 30a that faces the air discharge port 22b on the rear surface 16b and is spaced from the air exhaust port 22b, and a fan that is disposed between the heat exchanger and the rear surface 16b facing the heat exchanger. A ventilator 30b as means. As the rack heat exchanger, a heat exchanger such as a fin coil heat exchanger having a cooling coil can be appropriately employed. When the air exhaust device 30b is activated, the air taken into the rack 16 from the compartments 26a to 26e opened by the air inlets 22a of the racks 16 carries heat released from the electronic communication devices 20 in the racks. Then, it is directed from the air discharge port 22b to the corresponding heat exchanger 30a. The rack heat exchanger 30a is vertically divided into two parts (see FIG. 7). These heat exchangers 30a are sensible heat coolers and are controlled so as not to cause condensation.

  Each cooler 30 is connected to a cooling source mechanism 32. The cooling source mechanism 32 includes a cooling water source 34 such as a cooling tower, a cooling water heat storage tank or a refrigerator, and an intermediate heat exchanger 36 that receives cooling water from the cooling water source. In the example shown in FIG. 1, the intermediate heat exchanger 36 is provided corresponding to each cooler 30. In FIG. 1, the intermediate heat exchanger 36 other than the intermediate heat exchanger 36 for the first rack row 18 a, that is, the intermediate heat exchanger 36 for the rack rows 18 b to 18 d is omitted for simplification of the drawing.

  As shown in FIG. 2, each intermediate heat exchanger 36 has a primary cooling water pipe 40 for circulating the primary cooling water to and from the cooling water source 34 and a corresponding rack heat exchanger 30a. And a secondary cooling water pipe 42 for circulating the secondary cooling water. Of course, both water distribution pipes 40 and 42 are made of return pipes. Each of the water distribution pipes 40 and 42 is provided with a pump 44 for circulating each cooling water that is a heat medium.

  As this circulation pump 44, as shown in FIG. 3, a pair of pumps 44 connected in parallel to each other can be adopted. By adopting this pair of pumps 44, the reliability (redundancy) can be increased with respect to the circulation of each cooling water. The pump 44 is a barreled motor pump, for example.

  Each intermediate heat exchanger 36 performs heat exchange between the primary cooling water sent from the cooling water source 34 and the secondary cooling water sent from each rack heat exchanger 30a. By this heat exchange, the secondary cooling water that goes around each intermediate heat exchanger 36 and the rack heat exchanger 30a corresponding to the intermediate heat exchanger 36 effectively uses the heat released from the electronic communication device 20 by the rack heat exchanger. To absorb. Thereby, each rack 16 is cooled by the corresponding cooler 30.

  Each of the coolers 30 is desirably set so as to have a cooling capacity sufficient to process waste heat from all the electronic communication devices 20 in the corresponding rack 16. For example, 15 ° C. water per 1 kW of rack is introduced into the upper and lower rack heat exchangers 30a at a water volume of 15 liters / minute.

  In order to make the temperature of the intake air taken into each rack 16 through the air intake port 22a substantially equal to the exhaust air discharged from the rack through the heat exchanger 30a, A temperature sensor (not shown) is provided at the outlet. Based on the measured value of the temperature sensor, the rotational speed of the exhaust fan 30b and the opening degree of a flow rate adjusting valve (not shown) provided in each heat exchanger 30a are controlled. That is, as the temperature detected by the temperature sensor rises, the rotational speed of the exhaust fan 30b is increased and the opening of the flow rate adjusting valve is increased.

  The racks 16 in each rack row (18a to 18d) have the front surface 16a provided with the respective air suction ports 22a directed toward the air intake port 12c, and the rear surface 16b provided with the air discharge ports 22b directed to the exhaust port 12d. It is arranged in alignment toward the side of the. The air flow discharged downstream from the rack row (18a to 18d) is cooled to the same level as the upstream air temperature by the cooling action of the cooler 30 provided for each rack row (18a to 18d). Is done. The outside air treated air taken into the server room 12 from the air intake port 12c is adjusted to a temperature and humidity of, for example, 22 ° C. and 40 RH by an external air conditioner (not shown).

  When each cooler 30 of the air conditioning system 10 according to the present invention is activated, as shown by the black arrow 46 in FIG. 1, the air intake is directed from the first rack row 18a to the fifth rack row 18d. One direction of substantially uniform temperature distribution from the first compartment 26a where the opening 12c is opened as the most upstream to the fifth compartment 26e which is the most downstream from the first compartment 26a where the exhaust port 12d is opened. The air flow 46 is generated.

  Therefore, the racks 16 of each rack row (18a to 18d) are effectively cooled without causing unevenness between the rack rows (18a to 18d) due to the unidirectional air flow described above.

  The one-way air flow directed toward the most downstream fifth compartment 26e is caused by the operation of the return fan 48a provided in the air return path 48 that connects the fifth compartment 26e and the first compartment 26a. , A part thereof is returned to the first compartment 26a. Therefore, the one-way air flow 46 forms an air circulation around the compartment 26 (26a to 26e) and the air return path 48.

  As described above, since the exhaust fan 30b of the cooler 30 is controlled based on the measurement value of the temperature sensor, the operating status of the exhaust fan 30b varies depending on the thermal load of the corresponding rack 16. . Therefore, an atmospheric pressure difference may occur in the adjacent compartments 26 (26a to 26e) depending on the operating status of the exhaust fan 30b. Depending on the direction of the height difference, this atmospheric pressure difference may interfere with the smooth air flow 46 described above, and may cause a flow obstruction such as stagnation. The communication port 28 serves to eliminate a pressure difference that hinders the smooth air flow 46 such as the stay.

  In the air conditioning system 10 according to the present invention, all the racks 16 in each rack row (18a to 18d) can be appropriately cooled by the air flow 46 in the one direction. Accordingly, each rack 16 can be cooled without forming an air passage for rack cooling in the underfloor space 12f (see FIG. 7) between the floor surface 12a and the floor slab 12e (see FIG. 7). Since the cooling air passage is unnecessary, the height of the underfloor space 12f can be reduced. As a result, an increase in the height of the building 38 can be avoided.

Further, since the cooling water source 34 of the cooling source mechanism 32 can be installed on the roof or basement of the building 38, the space of the building 38 can be used effectively, and intermediate heat provided corresponding to the cooler 30 can be used. exchanger 36, the configuration is simple and inexpensive. Further, the intermediate heat exchanger 36 can supply the respective cooling mediums required to the individual heat exchangers 30b according to the load, and can process each generated heat at the heat generation point, so that it is efficient without waste. Cooling becomes possible.

  Furthermore, the primary cooling water from the cooling water source 34 is not directly guided to the rack heat exchanger 30 a provided in each rack 16, and the secondary cooling water is exchanged with each corresponding intermediate heat exchanger 36. Is only circulated. Therefore, even if the primary cooling water pipe 40 between the cooling water source 34 and the intermediate heat exchanger 36 is damaged, a large amount of primary cooling water can be prevented from flowing into the server room 12. Even if the secondary cooling water pipe 42 is damaged, each secondary cooling water pipe 42 is piped independently and in parallel, so that a large amount of damage is caused to damage the electronic communication device 20 in the rack 16. The cooling water does not flow into the server room 12.

  The electronic communication device 20 in each rack 16 is provided with a ventilator 20a (see FIG. 7). However, the blower 20a of the electronic communication device 20 can be made unnecessary by the blowing function of the blower 30b of the cooler 30.

  For maintenance and management of the electronic communication devices 20 in the racks 16, although not shown in the drawings, open / close doors that allow workers to enter and exit the compartments 26 a to 26 e can be provided on the partition walls 24.

  Further, a circulating flow indicated by a white arrow 49 in FIG. 1 is applied to the cooler 30 of each rack 16 in the compartments 26b to 26e from which the unidirectional air flow 46 is discharged from each rack row (18a to 18d). Deflection means (not shown) such as deflection fins can be provided for the purpose.

  This deflection means is normally held in a position that does not impede the flow of the air flow 46 in one direction. However, when a failure occurs in the cooler and the temperature rises, the rack row (18a to 18d) including the rack 16 in which the failure has occurred and all the rack rows 18a of the first stage 18a are detected by detecting the temperature rise. The deflection means is operated to a position where the air flow 46 discharged from the rack row is converted into a deflection air flow 48.

  For example, when a failure occurs in the cooler 30 of the rack 16 located in the center of the first rack row 18a, all the deflection means provided in the rack 16 of the rack row 18a are operated to the operating position. In this case, a circulating flow 48 is generated in the compartment 26b by the operation of the deflection means provided in the first rack row 18a including the rack 16 in which the failure has occurred.

  Therefore, the waste heat from the rack 16 corresponding to the failure target cooler 30 does not go directly to the rack 16 located at the center of the second rack row 18b, and the other coolers of the first rack row 18a. In the state mixed with the air cooled by 30, the air is supplied to the central rack 16 of the second rack row 18 b.

  That is, it is supplied to the subsequent rack row (18a to 18d) while being mixed with the air cooled by the other coolers 30 of the rack row (18a to 18d) to be failed. Therefore, the reduction in the cooling effect due to the failure can be evenly distributed to the racks 16 in the subsequent rack row. Therefore, even if a failure occurs in some of the coolers 30, the rack to be failed in the rack row (18a to 18d) at the rear stage of the rack row (18a to 18d) including the cooler 30 in which the failure has occurred. The temperature of the electronic communication device 20 accommodated in the specific rack 16 corresponding to the rack immediately below is prevented from rising significantly.

  In the example described above, when the cooler 30 of the rack 16 located in the center of the first rack row 18a fails, the waste heat from the failed rack 16 is lost in the rack 16 located in the center of the second rack row 18b. Therefore, the air can be prevented from going directly to the rack 16 located in the center of the second rack row 18b, and the air whose temperature has been made uniform is supplied to each rack 16 of the second rack row 18b as the rear row. A substantially uniform cooling effect can be obtained in each rack 16 in each of the second and subsequent rack rows.

  As the deflection means, for example, a circulation fan (not shown) for generating the circulation flow 49 described above is provided between the rack rows 18, and the circulation fan can be operated when the cooler 30 fails. In addition, a bellows-shaped partition that performs a deflection action as described above is provided at a predetermined position on the ceiling of the server room 12, and when the cooler 30 is operating normally, the partition is kept in a rolled-up state, and when the cooler 30 fails (the above-mentioned When the air blower is also stopped), the partition corresponding to the rack adjacent to the failure location is lowered, and the circulation flow 49 can be generated by the deflection action of the partition.

  As shown in FIG. 4, a plurality of server rooms 12 can be arranged in two rows with a corridor 38a of a building 38 in between. Further, a machine room 38b in which the intermediate heat exchanger 36 for the air conditioning system 10 and the like are arranged outside the hallway 38a along the row of both server rooms 12 can be arranged.

  1 to 4, an example in which a one-way flow is formed in the longitudinal direction of the server room 12 has been described. Next, an example in which an air flow that circulates in the server room 12 will be described.

  As shown in FIG. 5, a partition wall 50 perpendicular to the rack rows (18a to 18d) can be formed in the center of the server room 12 along the vertical partition walls 14a and 14b. Both ends of the middle partition wall 50 facing the horizontal partition walls 14c and 14d are spaced from the corresponding horizontal partition walls 14c and 14d. By the partition wall 50, the second to fourth partition chambers 26b to 26d excluding the first partition chamber 26a and the fifth partition chamber 26e are divided to the left and right as viewed from the partition wall 50.

  In the example shown in FIG. 5, the rack rows (18 a to 18 d) are arranged in four rows on the left and right sides of the partition wall 50 as in the example shown in FIG. 1. However, in each row, three racks 16 are arranged with the partition walls 50 in between, with the front surfaces 16a and the rear surfaces 16b oriented in the same direction. Moreover, on one side of the partition wall 50, the racks 16 are aligned with the rear surface 16b facing the horizontal partition wall 14c, and on the other side of the partition wall 50, the racks 16 have their front surfaces 16a sideways. Align toward the partition wall 14c.

  Further, in the example shown in FIG. 5, a space where air is discharged from one rack row and a space where air is sucked into another rack row spaced apart from this rack row are two corresponding sides of the server room 12. Each of the horizontal partition walls 14c and 14d is shared. This shared space (26e) is provided with an outside air processing air intake 12c, and the other space (26a) is provided with an exhaust port 12d.

  The rack heat exchanger 30a of the cooler 30 in each rack row (18a to 18d) is omitted in FIG. 5 for simplification of the drawing, but is similar to the cooling source mechanism 32 shown in FIG. Secondary cooling water is supplied from the intermediate heat exchanger 36.

  In the example shown in FIG. 5, the operation of the cooler 30 causes the reaction to flow in the server room 12 through each rack 16 and the cooler 30 provided in each rack, as indicated by a black arrow 46. A one-way flow in the clockwise direction is generated. Each rack 16 is suitably cooled by this one-way air flow 46, as in the example shown in FIG.

  In the example of FIG. 5 described above, it can be considered that 8 (n) compartments are formed by a total of 8 (n) partitions along the circulation direction of the air flow 46.

  Since the circulated air flow 46 in one direction around the server room 12 circulates in the server room 12 in an endless state, the air return path 48 shown in FIG. Since the remaining cold air can be utilized in the server room 12 if the amount of outside air taken into the room is exhausted, the configuration of the air conditioning system 10 can be simplified. Can do.

  Further, in the example shown in FIG. 5, the communication port 28 a is arranged in a part of the partition wall 24 adjacent to the vertical partition wall 14 a, that is, the partition wall 24 on one side of the space partitioned by the intermediate partition wall 50. The communication port 28b is disposed on the other side of the space partitioned by the middle partition wall 50, that is, in the vicinity of the vertical partition wall 14b. These communication ports 28a and 28b can be provided with filters, nets or movable blades as described above.

  As described above, the present invention has been described along the example in which the coolers 30 are arranged corresponding to the racks 16. However, as shown in FIG. 6, for example, two coolers 30 are used to connect three racks 16. Can be cooled.

  In the example illustrated in FIG. 6, three rows of rack rows (18 a to 18 c) are adopted on both sides of the partition wall 50, and three racks 16 are arranged in the left and right rows. The second and third compartments 26 b and 26 c are divided into left and right by a partition wall 50.

  In the example of FIG. 6, as in the example shown in FIG. 5, three racks 16 are arranged with the partition walls 50 in between so that the directions of the front surface 16 a and the rear surface 16 b coincide with each other. Moreover, on one side of the partition wall 50, the racks 16 are aligned with the rear surface 16b facing the horizontal partition wall 14c, and on the other side of the partition wall 50, the racks 16 have their front surfaces 16a sideways. Align toward the partition wall 14c. However, in the example of FIG. 6, as described above, the two coolers 30 are arranged corresponding to the three racks 16.

  As shown in FIG. 7, each of the coolers 30 includes an exhaust fan 30 b arranged at a distance from the rear surface 16 b of the rack 16, and the exhaust fan and the rear surface as described with reference to FIGS. 1 and 5. And a rack heat exchanger 30a disposed between 16b. The cooler 30 does not have to be formed integrally with the heat exchanger 30a and the exhaust fan 30b, but can be configured separately, and a filter or a humidifier can be provided between the two as necessary. .

  Instead, as shown in FIG. 8, the rack heat exchanger of the cooler 30 is arranged between the upstream heat exchanger 30-1a close to 16b, and the upstream heat exchanger and the exhaust fan 30b. It is possible to adopt a two-stage configuration with the downstream heat exchanger 30-2a. In this case, for example, by flowing the secondary cooling water in order from the downstream heat exchanger 30-2a to the upstream heat exchanger 30-1a, the upstream heat exchanger 30-1a has a downstream heat exchanger. Cooling water having a temperature higher than that of the cooling water supplied to 30-2a can be supplied, whereby multistage effective cooling excellent in redundancy and reliability can be realized. In the example shown in FIG. 8, the air intake port 22 a and the air discharge port 22 b of the rack 16 are omitted for simplification of the drawing.

  Moreover, in the above-mentioned, the example which provides a filter, a net | network, or a movable blade in the communicating port 28 (28b, 28b) was shown. Further, when the increase in the rack load is handled only by the increase in the flow rate of the heat medium, and the air blowing means is operated even when the heat exchanger pipe is damaged, a check valve is provided at the communication port. It can function as a stop damper.

  The present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the capacity of the cooler can be selected for each rack row in accordance with an increase in the amount of heat generated by the electronic communication device accommodated in each rack, and the flexibility and flexibility of replacement of the electronic communication device can be selected. An air conditioning system is provided.

It is a top view which shows the example of rack arrangement | positioning in the server room to which the air conditioning system which concerns on this invention was applied. It is the schematic of the intermediate heat exchanger of the air conditioning system shown in FIG. It is drawing similar to FIG. 2 which shows the other example of the intermediate heat exchanger of the air conditioning system shown in FIG. It is a top view of the building which shows the example of arrangement | positioning of the server room shown in FIG. FIG. 2 is a view similar to FIG. 1 showing another example of rack arrangement in the server room shown in FIG. 1. FIG. 6 is a view similar to FIG. 1 showing still another rack arrangement example of the server room shown in FIG. 1. It is a longitudinal cross-sectional view of the cooler for racks obtained along line VII-VII shown in FIG. It is drawing similar to FIG. 7 which shows the other example of the cooler for racks.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Air-conditioning system 16 Rack 16a Rack front surface 16b Rack rear surface 18 (18a-18d) Rack row | line | wire 20 Electronic communication equipment 22a Air inlet port 22b Air outlet port 30 Cooler 30a Rack heat exchanger 30b Air exhauster 32 Cooling source mechanism 34 Cooling water source 36 Intermediate heat exchanger 40 Primary cooling water piping 42 Secondary cooling water piping 46 Unidirectional air flow

Claims (7)

A cooler installed in each rack, the heat exchanger for cooling the air discharged from the plurality of racks each housing a plurality of electronic communication devices or the air taken into the plurality of racks; and the heat A cooling source mechanism for supplying cooling water to the exchanger, and a cooling system for an electronic communication equipment room in which the rack is housed,
The cooling source mechanism is provided in a room different from the electronic communication equipment room, and is provided between an intermediate heat exchanger provided corresponding to the heat exchanger of each of the coolers and each of the intermediate heat exchangers. A cooling water source through which primary cooling water is circulated, wherein the heat exchanger is disposed in the vicinity of the rack, and secondary cooling water circulates between the heat exchanger and the intermediate heat exchanger of the cooling machine. And
The racks are arranged side by side, and each of the plurality of intermediate heat exchangers has a flow rate in which the secondary cooling water circulates by operation of a corresponding pump and is provided in the heat exchanger of the cooler. A cooling system for an electronic communication equipment room, which is installed in each rack so that the secondary cooling water circulates through a control valve, and the intermediate heat exchanger is disposed outside the electronic communication equipment room. A room different from the electronic communication equipment room is provided with a plurality of intermediate heat exchangers,
In the intermediate heat exchanger, heat exchange is performed between the primary cooling water and the secondary cooling water led to the intermediate heat exchanger,
2. The electronic communication device room according to claim 1, wherein the flow control valve is controlled based on a temperature of an outlet of the cooler and exhaust air discharged from the rack through a heat exchanger. Cooling system.   The cooling water source includes a cooling tower and a refrigerator, measures the outside air wet bulb temperature, and when the outside air wet bulb temperature reaches a predetermined value, or when a predetermined value continues for a predetermined time, from the refrigerator to the cooling tower The electronic communication equipment room cooling system according to claim 1, wherein the electronic communication equipment room cooling system is switched to.   Each of the racks includes an air inlet provided on one of the front and rear surfaces, and an air outlet provided on the other of the front and rear surfaces, and the heat of the cooler. The cooling system for an electronic communication equipment room according to claim 1 or 2, wherein the exchanger is disposed to face the inlet or the air outlet of the rack.   The cooling system for an electronic communication device room according to claim 1 or 2, wherein the heat exchanger of the cooler is disposed outside the rack and facing the air discharge port.   3. The cooling system for an electronic communication equipment room according to claim 1, wherein the cooler includes an air exhaust unit that promotes exhaust air from the air exhaust port of the rack toward the heat exchanger. 4.   A plurality of the racks are arranged so that the directions of the one surface of the rack are aligned, and the plurality of the coolers are configured to reduce the total waste heat discharged from the corresponding rack row for each rack row. The cooling system for an electronic communication equipment room according to claim 1, wherein the electronic communication equipment room cooling system exhibits an ability to process.

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