Experimental study on cooling performance of tubular indirect evaporative coolers for data centers

In order to study the performance of indirect evaporative coolers and the principle of parameter selection,this paper designs and constructs a tubular indirect evaporative cooling system in a data center,and studies the influence of different parameters on the efficiency of indirect evaporative cooling system through experiments.The experimental results show that the primary air speed is inversely proportional to the indirect evaporation cooling efficiency.When the primary air speed is 2.2 m/s,the indirect evaporation cooling efficiency is 90.74%.With the increase of secondary air speed,the indirect evaporative cooling efficiency increases first and then decreases.The optimal secondary air speed is 3.1 m/s,and the indirect evaporative cooling efficiency is 80.03%.With the increase of primary air inlet temperature,the indirect evaporative cooling efficiency also increases first and then decreases.The optimal primary air inlet temperature is 29 ℃,and the indirect evaporative cooling efficiency can reach 71.45%.The indirect evaporative cooling efficiency increases with the increase of spray water flow rate and is finally stable.In order to reduce the total energy consumption of the device,the optimal spray water flow rate is 1.21 m3/h,and the indirect evaporative cooling efficiency can reach 83.51%.The research conclusion of this paper can provide certain reference for the design and process optimization of related indirect evaporative cooling equipment.