Numerical investigation for performance indices and categorical designs of a fan-assisted data center cooling system

Optimization on jet‐induced ventilation to enhance the uniformity of airflow distribution in data center

“…However, the thermal environment of the front racks and the overall airflow uniformity in DC can be further improved by more advanced techniques. 39,43 For the not enough agreeable cooling performance and airflow distribution in DC with CACS, this phenomenon can be attributed to the following two aspects. On the one hand, due to close distance between the front racks and CRAC units, the lower tile flow rates are obtained at the entrance of the cold aisles, besides the cooling attenuation along the vertical direction causes less cold air flow into the top server at the front racks to take away the heat generated by the server.…”

“…In previous similar studies, standard k-ε turbulence was generally used in the DC computational model and obtained good results. 22,[34][35][36][37][38]40,43 Therefore, in this paper, the standard k-ε turbulence model is still used with an enhanced wall function. 35,37 Besides, gridgeneration was based on GAMBIT software (version 2.4.6) and the results were analyzed on ANSYS FLUENT software (version 18).…”

“…There is a significant angle in the airflow parallel to the resistance plane due to an increase of the pressure drop in the horizontal direction of the cold aisles. According to Song, 42,43 this phenomenon entails that more of the airflow emitted by the perforation tiles flow past the rack inlets without entering it. The maximum velocity of 0.23 m/s is obtained at the bottom of the racks, while the velocity is only 0.07 m/s at the top.…”

“…Consuming the lower power by fans to further reduced load on the CRAC units was proved to be a completely feasible method to achieve energy-saving. Song [41][42][43] proposed a fan-assisted cooling system setting fans in the plenum in under-floor DC. The results showed that fan-assisted perforations was an effective technique to improve the cooling performance of DC, while the fan efficiency and the cooling performance were related to the height of fan within the plenum.…”

Multi-objective layout optimization of a generic hybrid-cooled data centre blade server

“…The paper presented the areas of the potential research for data centre thermal magamanet. Song [16] examined the use of organized fan-assisted tile systems and investigated their impact on the cooling effectiveness. The author came to the conclusion that the technique can significantly improve the cooling performance and might be an interesting research direction in the future.…”