A parametric study of the heat exchanger copper coils used in an indirect evaporative cooling system

摘要

Due to the lower energy consumption in the evaporative cooling, it is the subject of numerous studies. Evaporativecooling considers a green cooling system which does not require any chemical reaction and does not depend on thehazardous material. The present study mainly focused on parametric analysis of an indirect evaporative cooling systemusing the computational fluid dynamics method. The numerical simulation of an indirect evaporative cooling systemwas carried out using ANSYS Fluent 18.2. The effects of the water inlet velocity, air inlet velocity, coil diameters (dc)and the number of the heat exchanger copper coils were numerically investigated. The flow was considered as threedimensional,turbulent, and incompressible. The results indicated that the increment of the coil diameter and waterinlet velocity had a positive effect on the performance of the indirect evaporative cooling system. The maximum wateroutlet temperature was obtained at 285.05 K for the water inlet velocity of 0.5 m/s. Moreover, the saturation efficiency isdecreased by increasing air inlet velocity. On the other hand, saturation efficiency was increased at all air inlet velocitiesby increasing the coil diameter.