The numerical simulation and experimental study on rack cooling effect in date center with UFAD system

Abstract

In order to analyze the way of improving the cooling effect of the data center with the UFAD system, the HVAC simulation software-Airpak-was applied. Numerical simulations for the interior temperature of the rack at different porosity ratios were carried out, and the simulated results indicate that the way of partly enhancing the porosity ratio of the front door and back door can improve the cooling effect. To solve the issue of the thermal current recycle in the exhaust outlet and airflow distribution disorder, the measure of the cold aisle regional closure was taken, and the comparison of data before and after the closure of the cold aisle proved its positive influence on the cooling effect: to lowering the inlet air temperature of racks, to improve airflow distribution inside and outside of the rack and to solve the thermal current recycle in the exhaust outlet.