JP2016042233A - Flow rate measuring system for cool air from porous opening type double floor panels - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to measure relative flow rate levels, which differ with the positional relation to an air conditioner, of the cool air blown up from porous opening type double floor panels by measuring the flow rate level of each panel only once.SOLUTION: A system for measuring the flow rates of cool air for ICT equipment in an ICT equipment operating room is equipped with a double floor under which cool air from an air conditioner flows and on whose top face the ICT equipment is arranged, opening panels that are installed beside where the ICT equipment is arranged on the double floor and constitute part of the double floor and into which multiple small holes for supplying cool air flowing underneath the double floor to the ICT equipment in the ICT equipment operating room flows are bored, a fluid sucking nozzle that is arranged over the opening panels and rectifies cool air from the holes in the opening panels and whose inflow port is in a trumpet shape having a diameter expanding toward the opening panels, the inflow port being provided with a fluid sucking nozzle covering all the multiple holes in the opening panels from above, and an anemometer that is arranged over an outflow port of the fluid sucking nozzle and measures the flow rate of cool air from the fluid sucking nozzle.SELECTED DRAWING: Figure 6

Description

  TECHNICAL FIELD The present invention relates to a cold flow velocity measurement system for a double-floored double-floor panel in a double-floor air conditioning system in a data center / communication building, and more particularly, relative to the opening location of the cold air blowing from below the double floor. The present invention relates to a system for measuring the magnitude of a flow velocity.

  In recent years, with the spread of the Internet and ICT (Information and Communication Technology) services and the like, power consumption by devices installed in communication buildings, data centers, and the like has increased significantly. In particular, the amount of heat generated from these devices is rapidly increasing due to the higher functionality and higher density of communication devices and server machines (hereinafter referred to as ICT devices).

  ICT devices installed in communication buildings, data centers, and the like are installed in a state where a plurality of units are arranged in an orderly manner in a dedicated operation room (space) that is temperature-controlled at an appropriate temperature.

  FIG. 1 is a side view showing the configuration of an ICT equipment operating room in which ICT equipment is installed (see Patent Document 1). In the ICT equipment operating room 100, ICT equipment 111-1 to 111-m are stored, and racks (device storage racks) 110-1 to 110-n arranged in one or more rows and warm air discharged from the ICT equipment. An air conditioner 120 that collects 101 and supplies cold air 102 that cools the ICT equipment is disposed. The floor surface of the ICT equipment operating room 100 is formed in a double floor structure, and a free access floor 130 to which the cold air 102 from the air conditioner 120 is supplied is formed between the floor 131 and the double floor 132.

  Each of the ICT equipment dedicated racks 110-1 to 110-n has a width and a depth corresponding to one of the ICT equipments 111-1 to 111-m, and a plurality of the ICT equipments 111-1 to 111-m are arranged in the vertical direction. Are mounted and supported on the side of the rack in a form of being stacked in parallel while ensuring a gap. In the air conditioner 120, the upper surface is a suction surface of the warm air 101 discharged from the ICT devices 111-1 to 111-m, and the bottom surface is a supply surface of the cold air 102 to the ICT devices 111-1 to 111-m. The cold air 102 is supplied from the air conditioner 120 into the free access floor 130 below the double floor 132. Next to the installation positions of the ICT dedicated racks 110-1 to 110-n, opening panels 133-1 to 133-n for discharging the cool air in the free access floor 130 to the ICT devices 111-1 to 111-m are laid. It is part of the floor.

  The cold air 102 discharged from the air conditioner 120 into the free access floor 130 below the double floor 132 passes through the openings (holes) of the opening panels 133-1 to 133-n and is on the double floor 132 in the ICT equipment operating room 100. And supplied to the ICT devices 111-1 to 111-m in the ICT device dedicated racks 110-1 to 110-n. The cold air 102 is heated by the ICT devices 111-1 to 111-m to become the warm air 101 and is collected from the upper surface of the air conditioner 130.

  Since the cold air 102 from the air conditioner 120 is supplied into the free access floor 130, mixing with the warm air 101 heated by the ICT devices 111-1 to 111-m is suppressed, and the cooling of the ICT devices 111-1 to 111-m is suppressed. Efficiency can be improved.

  2A and 2B are perspective views showing examples of the opening panels 133-1 to 133-n installed on the double floor 132 of the ICT equipment operating room 100. The opening panels 133-1 to 133-n are provided with a large number of round holes as shown in FIG. 2A or square holes as shown in FIG. Spouted perforated double floor panels are common.

  FIG. 3 is a diagram showing the state of cool air and warm air in the ICT equipment operating room 100 of FIG. FIG. 3 (a) is a top view of the ICT equipment operating room 100, and FIG. 3 (b) shows the CFD (computational fluid analysis) analysis results of cold air and warm air in section AA ′ in FIG. 3 (a). FIG. In the figure, the shaded portion of the shaded portion has a high flow rate, and the lightly colored portion has a slow flow rate. As shown in FIG. 3 (b), the perforated double floor panel shown in FIG. 2 (a) or 2 (b) has a pressure distribution in the free access floor and obstructions such as cables installed in the free access floor. Even if the same opening diameter is provided due to various factors such as the presence or absence of an object, it is common that the flow rate of the jet changes depending on the relationship between the position of the air conditioner and the opening position. For this reason, when the ICT equipment is efficiently cooled in the data center, the relative magnitude of the flow rate at each position of the cold air that blows out from the perforated-open double floor panel (open panel 133-1 to n) is known. It becomes important.

Japanese Patent Laid-Open No. 10-082128

  Here, FIG. 4 is a diagram showing the state of cold air and warm air in the ICT equipment operating room 100 of FIG. FIG. 4 (a) is a top view of the ICT equipment operating room 100, and FIG. 4 (b) is a measurement result by PIV (Particle Image Velocity Measurement Method) of cold and warm air in a cross section at BB ′ in FIG. 4 (a). FIG. 4C is a cross-sectional view of cold air and warm air in BB ′ of FIG. 4A according to CFD (computational fluid analysis) of cold air and warm air in BB ′ of the ICT equipment operating room 100. It is a figure which shows an analysis result.

  When the flow velocity of the fluid (cold air) spouted at each installation position of the perforated double floor panel (open panels 133-1 to n) is measured, the wind speed is in the vicinity of the perforated portion of the perforated double floor panel. It was considered to install a meter and measure.

  Usually, in order to measure the flow velocity of the fluid ejected from the opening panel in the ICT equipment operating room, measurement is performed while moving a plurality of places by using one wind speed sensor. If there are multiple permanent sensors, the presence of a wind speed sensor will obstruct passage of the passage, and it will become an obstacle to air passing through the hole in the opening panel, which will also hinder air circulation. is there.

  However, as shown in FIG. 4 (b) or (c), even with the same porous aperture type double floor panel, the flow rate varies greatly depending on the position of the perforated part. When measuring, if the flow velocity is measured at each specific opening location at each installation position of the perforated double floor panel, the relative flow rate of the fluid that spouts at each installation position of the perforated double floor panel is measured. The relative magnitude of the flow velocity of the spouted fluid due to the positional relationship between each opening panel and the air conditioner could not be measured. Therefore, in order to measure the accurate flow velocity, it is compelled to measure several points at the perforated points and take the average, and to measure the wind speed spouted from one perforated double floor panel It was necessary to measure the flow velocity of the fluid ejected from the location.

  In order to solve the above-described problems, the present invention provides a porous opening type double floor panel provided with a large number of perforated portions, and the flow rate of the fluid spouted from the double bed can be reduced in a short time and with a small number of measurements. The purpose is to provide a system that measures and measures the magnitude of the flow velocity.

  In order to achieve the above object, according to a first aspect of the present invention, there is provided a system for measuring a flow rate of cool air that cools ICT equipment in an ICT equipment operating room, in which cool air from an air conditioner flows downward, and ICT A double floor on which equipment is arranged, and an open panel installed on the side of the double floor on which the ICT equipment is arranged, constituting a part of the double floor, A plurality of small holes for supplying the cold air flowing under the ICT equipment in the ICT equipment operating room, an opening panel disposed on the opening panel, and the cold air from the openings of the opening panel A fluid suction nozzle for rectifying the fluid, the inlet having a trumpet shape whose diameter is expanded toward the opening panel, and the inlet has an opening diameter spanning a plurality of holes on the opening panel. And the fluid suction nose Is installed in the outlet to measure the flow rate of the cold air from the fluid suction nozzles, characterized in that it comprises a wind gauge.

  Further, a second aspect of the present invention is the system according to the first aspect, wherein a processing device is connected to the anemometer, and a signal from the anemometer is processed and stored in the processing device. It is characterized by.

  A third aspect of the present invention is the system according to the first or second aspect, wherein the fluid suction nozzle has a ratio of an opening diameter of the inlet to an opening diameter of the outlet of 4 or more. The diameter is increased by a pair 3.

  According to the present invention, it is possible to measure the relative magnitude of the flow velocity that is spouted from the perforated-opening double floor panel depending on the positional relationship with the air conditioner by measuring each panel once.

It is a side view which shows the structure of the ICT apparatus working room where the ICT apparatus was installed. (A) And (b) is a perspective view which shows the example of the opening panel installed in the double floor of an ICT apparatus working room, respectively. It is the figure showing the mode of the cool air and the warm air in the ICT apparatus working room of FIG. FIG. 3 (a) is a top view of the ICT equipment operating room, and FIG. 3 (b) is a diagram showing the analysis results of CFD (computational fluid analysis) of cold air and warm air in section AA ′ in FIG. 3 (a). It is. It is the figure showing the mode of the cool air and the warm air in the ICT apparatus working room of FIG. 4 (a) is a top view of the ICT equipment operating room, and FIG. 4 (b) shows the measurement result by PIV (Particle Image Velocity Measurement Method) of the cold air and the warm air of the cross section at BB ′ of FIG. 4 (a). FIG. 4C is a diagram showing the analysis results of CFD (numerical fluid analysis) of the cold air and the warm air in the cross section taken along the line BB ′ in FIG. It is a side view which shows the structure of the ICT equipment operation room where the spout flow velocity measurement system of the perforated opening type double floor panel concerning one embodiment of the present invention was introduced. It is a perspective view which shows the structure of the opening panel and fluid suction nozzle of the spout flow velocity measurement system of the opening panel in the ICT apparatus working room of FIG. It is the figure which compared the magnitude | size of the hole formed in the opening panel, and the fluid suction nozzle. It is a top view which shows an example of apparatus arrangement | positioning in the ICT apparatus operation room in the spout flow velocity measuring system of the perforated opening type | mold double floor panel concerning this invention. It is a figure which shows the measurement result of the flow velocity measurement of the spout flow velocity measuring system of the porous opening type double floor panel of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 5 is a diagram showing a structure of an ICT equipment operating room 500 in which a system for measuring a flow velocity of a blow-up type double floor panel according to an embodiment of the present invention is introduced. In the ICT equipment operating room 500, ICT equipment 511-1 to m are stored, racks for exclusive use of ICT equipment (device storage racks) 510-1 to 510-n arranged in one or a plurality of rows, and warm air discharged from the ICT equipment. And an air conditioner 520 that supplies cool air for cooling the ICT equipment. The floor surface of the ICT equipment operating room 500 is formed in a double floor structure, and a free access floor 530 to which cold air from the air conditioner 520 is supplied is formed between the floor 531 and the double floor 532.

  Each of the ICT equipment dedicated racks 510-1 to 510-n has a width and a depth corresponding to one of the ICT equipments 511-1 to 511-1m, and a plurality of the ICT equipment 511-1 to 51m are between the vertical directions. Are mounted and supported on the side of the rack in a form of being stacked in parallel while ensuring a gap. In the air conditioner 620, the upper surface is a suction surface for the warm air 501 discharged from the ICT devices 511-1 to 511-m, and the bottom surface is a supply surface for the cold air 502 to the ICT devices 511-1 to m. The cold air 502 is supplied from the air conditioner 520 into the free access floor 530 below the double floor 532. Beside the installation positions of the ICT dedicated racks 510-1 to n, an opening panel 533 which is a porous opening type double floor panel for discharging the cool air in the free access floor 530 to the ICT equipment 511-1 to m. -1 to n are laid and constitute a part of the double floor (the number of opening panels and the number of ICT racks may not be the same).

  The cold air 502 provided in the free access floor 530 below the double floor 532 from the air conditioner 520 passes through the openings (holes) of the open panels 533-1 to n and is on the double floor 532 in the ICT equipment operating room 500. And are supplied to the ICT devices 511-1 to 511-m in the ICT device dedicated racks 510-1 to 510-n. The cool air 502 is heated by the ICT devices 511-1 to 511-1m to become warm air 501 and is collected from the upper surface of the air conditioner 520.

  On the upper surface of any one of the opening panels 533-1 to n, a fluid suction nozzle 534 for sucking fluid ejected from a plurality of openings of the opening panels 533-1 to n and the flow velocity of the sucked fluid is measured. An anemometer 535 for processing and a processing device 536 for processing and recording the signal of the anemometer 535 are installed.

  The fluid suction nozzle 534 and the anemometer 535 are installed on any one of the opening panels 533-1 to 533 -n, and measure the wind speed of the cold air blown up from the opening panel. After a certain period of time, the installation location of the fluid suction nozzle 534 and the anemometer 535 is changed, and the wind speed of the cold air blown up at a location different from the previous measurement location of the opening panels 533-1 to n is measured. In this way, the wind speed of the cool air blown up at a plurality of positions on the opening panels 533-1 to 533-n is measured.

  FIG. 6 is a diagram showing the configuration of the opening panel and the fluid suction nozzle of the spout flow velocity measurement system for the opening panel in the ICT equipment operating room 500 of FIG. 5, and FIG. 7 shows the holes formed in the opening panel. It is the figure which compared the magnitude | size with a fluid suction nozzle.

  The fluid suction nozzle 620 has a trumpet shape whose diameter is increased in the floor direction, which is the upstream direction of the flow, in order to suck the fluid 601 ejected from the plurality of holes 611 formed in the opening panel 610 and measure the flow velocity. It is disposed at a position near the panel 610. The inlet 621 of the fluid suction nozzle 620 on the side for sucking cold air (fluid 601) rectifies the flow rate of the fluid 601 that varies depending on the place where the hole is provided, and measures the variation due to the variation of the fluid 601 in each location. In order to reduce the influence of the error, the diameter spans the plurality of holes 611 of the opening panel 610 as shown in FIG. The fluid suction nozzle 620 is enlarged in a ratio of the diameter of the inlet (621) to the outlet (622) of 4 or more: 3.

  The anemometer 630 is installed in the downstream direction (outlet 622 side) of the flow of the fluid suction nozzle 620 in order to measure the flow velocity of the sucked fluid 601. The anemometer 630 measures the flow velocity of the fluid 601 rectified by the fluid suction nozzle 620 in the vertical direction, so that the anemometer 630 is positioned at a position near the downstream direction of the fluid suction nozzle 620 (directly above the outlet 622). , Arranged to measure the vertical component of the fluid 601. The anemometer 630 is connected by a signal line 641 to a processing device 640 for recording and processing signals in order to process time fluctuations in the flow velocity. The processing device 640 may be installed in the ICT equipment operating room 500 as shown in FIG. 5 or may be installed outside the ICT equipment operating room 500.

  The fluid blown up from the plurality of holes provided in the opening panel 610 enters the inlet 601 of the fluid suction nozzle 620, is rectified, and is measured by the anemometer 630 provided at the outlet 622. The fluid that spouts from each hole 611 of the opening panel 610 varies depending on the place and time at which the hole 611 is provided and does not spout at a constant wind speed, but the fluid suction across the plurality of holes 611 of the opening panel 610 Since the flow is rectified by the nozzle 620, the flow velocity of the fluid in a certain range of the opening panel 610 can be collectively measured, and variation in the flow velocity of the jetted fluid due to the opening location and time is reduced.

  In the present invention, the flow velocity of the fluid in a certain range of the opening panel can be collectively measured, and variations in the flow velocity of the jetted fluid due to the opening location and time are reduced. Therefore, a stable measurement result of the flow velocity of the spouted fluid can be obtained, and the relative flow velocity that varies depending on the positional relationship between each panel and the air conditioner can be measured.

  Therefore, it is possible to measure the relative flow velocity that varies depending on the positional relationship between each panel and the air conditioner with a small number of measurements, that is, the operation required for human measurement is reduced. In addition, a stable measurement result of the flow velocity of the jetted fluid can be obtained.

[Example]
FIG. 8 is a diagram showing an example of equipment arrangement in the ICT equipment operation room 800 in the system for measuring the flow velocity of a blown-up double floor panel according to the present invention. In the ICT equipment operation room 800, ICT equipment dedicated racks 810-1 to 810-5 in which ICT equipment is stored on a double floor and an air conditioner 820 are installed. The air conditioner 820 is installed adjacent to the wall surface at one end in the longitudinal direction of the ICT equipment operation room 800, and the ICT dedicated racks 810-1 to 810-5 are arranged in order from the air conditioner 820 side in the longitudinal direction of the ICT equipment operation room 800. 810-1, 810-2, 810-3, 810-4, and 810-5 are arranged in a line in this order. The distance between the air conditioner 820 and the ICT dedicated rack 810-1 is 1800 [mm]. The vertical width of the free access floor is 450 [mm].

  A total of 10 open panels 830-1 to 10-2 on each side of each ICT equipment rack 810-1 to 5, in a direction in which the longitudinal direction is perpendicular to the longitudinal direction of the ICT equipment operating room 800, They are arranged next to each other. Each of the opening panels 830-1 to 830-10 has a total length of 1200 [mm] and a total width of 300 [mm], and includes a plurality of aperture groups in which a plurality of 14 [mm] φ aperture holes are formed at intervals of 6 [mm] vertically and horizontally. Have.

  The fluid suction nozzle 840 and the anemometer 850 are installed on the upper part of one of the plurality of opening groups of the opening panel. The fluid suction nozzle 840 has an expanded inlet diameter of 70 [mm], an outlet diameter of 46 [mm], a total length of 70 [mm], and the inlet is 100 [height] from the perforated double floor panel. mm] in the direction of expanding the diameter relative to the opening panel.

  There are various types of anemometers 850 such as a positive displacement type, an electromagnetic measurement type, and an ultrasonic type. In this embodiment, a thermal mass flowmeter is used, and the flow velocity of the vertical component of the fluid ejected from the fluid suction nozzle 840 is 0 [mm. / S] to 4 [mm / s], the flow rate of the fluid suction nozzle 840 from the outlet portion of the fluid suction nozzle 840, that is, the height of 170 [mm] from the double-opened double floor panel is measured. It is arranged in the direction of measuring the vertical component near the center of the exit.

  The fluid ejected from the opening panel is measured from the air conditioner 820 at positions 2100 [mm], 2700 [mm], 3300 [mm], and 3800 [mm], respectively (opening panels 830-2, 4, 6). , 8 top). Here, the fluid spouted from the opening panel is measured with the positions at which the fluid suction nozzle 840 and the anemometer 850 are attached in order from the air conditioner side as A point, B point, C point, and D point. As a comparative example, the flow velocity of the fluid ejected from the opening panel is measured only by the anemometer 850 without using the fluid suction nozzle 840 at the same position as the points A, B, C, and D (air conditioning). (A ′ point, B ′ point, C ′ point, D ′ point from the machine side).

  FIG. 9 is a diagram showing the measurement result of the flow velocity measurement of the spout flow velocity measurement system of the porous aperture type double floor panel of FIG. The flow velocity of the blown-up fluid is measured in the order of point A, point B, point C, point D, point D ′, point C ′, point B ′, and point A ′ by moving the fluid suction nose 840 for a certain period of time. To do. The horizontal axis of the graph of FIG. 9 is time, and the vertical axis is the output signal of the anemometer 850 at each measurement location. The larger the output from the anemometer 850, the faster the wind speed.

  From the measurement results, it can be seen that the measurement results at points A, B, C, and D using the fluid measurement nozzle of the present example are relative to the flow velocity as A << B << C << D. On the other hand, at the points A ′, B ′, C ′, and D ′ where an anemometer is arranged at a height of 170 mm from the perforated-open double floor panel without using a fluid suction nozzle Since the position and the flow rate of the ejected fluid vary due to time fluctuation, it is impossible to see the relative magnitude of the flow velocity as in the case where the fluid suction nozzle is installed.

  As described above, according to one embodiment of the present invention, the relative magnitude of the flow velocity spouted from the perforated double floor panel, which varies depending on the positional relationship with the air conditioner, is measured by measuring each panel once. Is possible.

100, 500, 800 ICT equipment operation room 101, 501 Warm air 102, 502 Cold air 110-1 to n, 510-1 to n, 810-1 to 4 ICT equipment dedicated rack 111-1 to m, 501-1 to m ICT Equipment 120, 520, 820 Air conditioner 130, 530 Free access floor 131, 531 Floor 132, 532 Double floor 133-1-n, 533-1-n, 610, 830-1-10 Open panel 534, 620, 840 Fluid suction nozzles 535, 630, 850 Anemometers 536, 640 Processing device 611 Hole 621 Inlet 622 Outlet 641 Signal line

Claims (3)

A system for measuring the flow rate of cold air that cools ICT equipment in an ICT equipment operating room,
A double floor where the cold air from the air conditioner flows down and the ICT equipment is placed on the top surface;
An opening panel installed on the side where the ICT equipment of the double floor is arranged, and constitutes a part of the double floor, and cool air flowing under the double floor is converted into the ICT equipment operating room. An aperture panel in which a plurality of small holes for supplying to the ICT equipment in the aperture are opened;
A fluid suction nozzle that is disposed on the opening panel and rectifies cool air from a hole of the opening panel, and has an inlet formed in a trumpet shape with a diameter increasing toward the opening panel. A fluid suction nozzle having an opening diameter across a plurality of holes on the panel;
An anemometer installed at the outlet of the fluid suction nozzle and measuring the flow rate of the cold air from the fluid suction nozzle.   The system according to claim 1, wherein a processing device is connected to the anemometer, and a signal from the anemometer is processed and stored in the processing device.   3. The system according to claim 1, wherein the fluid suction nozzle has a ratio of an opening diameter of the inflow port to an opening diameter of the outflow port of 4 or more and 3 in diameter.