Numerical analysis-based performance prediction in a direct evaporative cooler used for building cooling

Abstract

In the present performance parameters is determined for the varied operating conditions using mathematical modelling. Outlet humidity ratio, Dry bulb temperature (DBT), cooling efficiency and cooling effect have been predicted by varying the air velocities, inlet DBT, inlet relative humidity (RH) and pad thickness for three different wettability of Celdek packing. Predicted results revealed that cooling effect, saturation efficiency, ΔDBT and humidity ratio are found to be increasing with the increase in pad thickness and wettability of the material. An increase in the inlet air flow rate and RH resulted in a decrease in ΔDBT, humidity ratio and cooling efficiency. The maximum performance of ΔDBT, ΔRH, saturation efficiency and cooling effects have been observed for Celdek 7090 and are equal to 6°C, 55%, 90% and 7000 Watts for the thickness of 0.3 m, wettability of 630 m²/m³. Wettability of 630 m²/m³ & thickness 0.3 m gave maximum performance.

KEYWORDS:

• Wettability
• Celdek
• saturation efficiency
• pad thickness
• numerical modelling
• evaporative cooling

Disclosure statement

No potential conflict of interest was reported by the author(s).