By Vaibhav K. Arghode, Yogendra Joshi
The short speak about essentially points of ventilation administration in raised ground information facilities. to begin with, cooling air supply via perforated tiles could be tested and impact of the tile geometry on circulate box improvement and sizzling air entrainment above perforated tiles should be mentioned. Secondly, using chilly aisle containment to bodily separate cold and hot areas, and reduce cold and hot air blending could be awarded. either experimental investigations and computational efforts are mentioned and improvement of computational fluid dynamics (CFD) established versions for simulating ventilation in info facilities is integrated. additionally, metrology instruments for facility scale air speed and temperature dimension, and ventilation cost size via perforated flooring tiles and server racks are tested and the authors current thermodynamics-based versions to gauge the effectiveness and value of ventilation administration schemes in facts centers.
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Extra resources for Air Flow Management in Raised Floor Data Centers
9a. 3 PIV System at the Data Center Laboratory, Georgia Tech One of the first PIV system for data centers was customized at the Data Center Laboratory, Georgia Tech and is shown in Fig. 9b. ). Two cameras are positioned side by side as shown in the Fig. 9b, and the width of combined field of view of both the cameras corresponds to a standard tile size. The cameras and the laser are mounted on a traverse system that could be moved vertically to cover the height of a standard rack by acquiring velocity field at multiple locations, and finally stitching them together.
A) Rack air flow characteristics, (ΔPr = S × Q + T). (b) Reduction in air flow rate due to tool resistance (source: Arghode and Joshi 2015b). Reprinted with permission from ASME (ΔPr) follow the fan laws quite well for different fan speeds. Note that for each case, the dial settings are same for all four server simulators, resulting in nearly uniform air flow through all the fans. Note that for the case without the posterior cover (Fv = 100 %, see Fig. 6d), the differential rack pressure (ΔPr) is slightly greater than zero.
The system characteristic for the active tile is given by ΔPt,a = ΔPt,s − ΔPn, where ΔPt,s is the system curve or pressure loss characteristic for the active tile without the fans, essentially a passive tile, see Fig. 3a. Note that, for the passive tile the air flow rate is zero for zero differential pressure (Pp − Pm). 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.