Application of the combined air-conditioning systems for energy conservation in data center.

Highlights: [•] A CFD simulation shows that In-row cooling system can solve the problem in case of cool air cannot reach to the top of rack. [•] This paper shows the new combined cooling system for using in data center. [•] A correlation of dimensionless parameters is presented by SHI and product of Re, Pr and β. [•] Correlation obtained helps to control the rack temperature at any height more effective. [Copyright &y& Elsevier]