By Vaibhav K. Arghode, Yogendra Joshi
The short speak about essentially features of ventilation administration in raised flooring info facilities. to start with, cooling air supply via perforated tiles should be tested and impression of the tile geometry on move box improvement and scorching air entrainment above perforated tiles can be mentioned. Secondly, using chilly aisle containment to bodily separate cold and hot areas, and reduce cold and hot air blending might be provided. either experimental investigations and computational efforts are mentioned and improvement of computational fluid dynamics (CFD) dependent versions for simulating ventilation in facts facilities is integrated. furthermore, metrology instruments for facility scale air pace and temperature size, and ventilation cost dimension via perforated flooring tiles and server racks are tested and the authors current thermodynamics-based types to gauge the effectiveness and value of ventilation administration schemes in information centers.
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Extra info for Air Flow Management in Raised Floor Data Centers
From the figure it can be deduced that the air flow rate (Q) and the rack differential pressure Fig. 7 Details of the server simulator rack under investigation. (a) Server simulator rack. (b) Measured fan speed. Non-uniformity within ±10 % (source: Arghode and Joshi 2015b). 2 Actual (Qr = –T / S) With Tool (Qr&I = Measured) Fig. 8 Measured slope (S) for a range of fan speeds. (a) Rack air flow characteristics, (ΔPr = S × Q + T). (b) Reduction in air flow rate due to tool resistance (source: Arghode and Joshi 2015b).
However, this is not the case for an active tile because of the presence of the fans. In fact, the air flow rate through the active tile for zero differential pressure corresponds to the intersection of system curve for passive tile (ΔPt,s) and the fan curve (ΔPn), see Fig. 3a. For a given differential plenum pressure (Pp − Pm), the flow rate for the passive tile will be given by the intersection of constant differential plenum pressure curve with the system curve of the passive tile (ΔPt,s), denoted here as Qt,s.
To measure the thermal field, a 3D array of Copper-Constantan (“T-type”) thermocouples with wire diameter of 321 μm, is deployed in a mobile grid at the Data Center Laboratory, Georgia Tech, see Fig. 10a. The width of the deployed tool is 122 cm (4 ft), covering the full width of the cold aisle. 45 cm) rack. There is a total of 256 thermocouples on the mobile grid which are mounted in nine planes along the width, five along the depth, and six along the height of the grid. Complete 3D mapping of the cold aisle can be performed by stitching together the acquired data along the length of the aisle.
Air Flow Management in Raised Floor Data Centers by Vaibhav K. Arghode, Yogendra Joshi