By Vaibhav K. Arghode, Yogendra Joshi
The short speak about basically features of ventilation administration in raised flooring information facilities. to start with, cooling air supply via perforated tiles could be tested and impact of the tile geometry on circulate box improvement and scorching air entrainment above perforated tiles could be mentioned. Secondly, using chilly aisle containment to bodily separate cold and warm areas, and reduce cold and warm 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 info facilities is integrated. furthermore, metrology instruments for facility scale air pace and temperature size, and ventilation price dimension via perforated ground 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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The construction of the tool also allows minimal physical intrusion during measurements. For a steady state experiment, the data is generally recorded for 30 s, with a sampling rate of 1 s, and the average data is reported. A time delay of 5 min is generally used for the flow field to stabilize after moving the tool to a new location. Note that this tool has also been useful in transient thermal field characterization apart from steady state experiments. These tools have a built in power supply and can transmit the data wirelessly, thus improving their mobility and easing the data acquisition 24 2 Metrology Tools Fig.
12). 12) Note that the MBF model will have higher magnitude of excess X-momentum flow rate (ΔM) as compared to the BF model, because the velocity at the vena contracta is expected to be higher than the average velocity at the pores. 13). Note that the scaled excess X-momentum is only a function of the pressure loss factor. 13) In the BF model the height of the momentum source region (H) was chosen to be 4″ (Abdelmaksoud et al. 2010) without providing any physical basis for this selection. The width (W) corresponded to the tile size (L).
On such unique system was described, which had the capability to measure finely resolved velocity field covering a large area. The operating principle of a commercial tile air flow measurement tool was included, and its applicability for both passive and active tiles was discussed. An in-house developed rack air flow rate measurement tool was also presented, along with an estimation of tool resistance related errors in the measurement. Commercial pressure measurement sensors were presented briefly with their salient features.