CRAC Units and CRAC Unit Styles How does TileFlow estimate the flow rate through a CRAC unit?
TileFlow treats a CRAC unit as a fixed flow rate device. The flow rate is assumed to be the same as the rated flow rate and is specified as part of the input for CRAC unit style. (Theoretically, the flow rate depends on the pressure in the plenum, and it must be calculated using a performance curve, which provides the relationship between the flow rate and the total pressure drop across the CRAC unit assembly. However, in a CRAC unit, the total pressure drop is nearly constant, independent of the pressure in the plenum, as much of the pressure drop occurs within the unit itself. As a result, the flow rate through a CRAC unit is insensitive to the pressure levels in the plenum and stays close to the rated value.) Back to top How can we add a turning vane (scoop) on a CRAC unit? To include turning vane on a CRAC unit, simply select the unit and click Install Turning Vane button on the toolbar. You will see a black line on the CRAC unit, indicating the presence of turning vane. To remove
