Discussion on Key Performance Parameters of Evaporative Cooling Air Handling Units

Abstract

This paper introduces two types of evaporative cooling air handling units and describes the overall dimension and performance parameters. Test data is collected and used to draw figures to show the relationship of the efficiency and pressure drop of the direct evaporative cooler with the water-drenching density, as well as figures about the performance of the fillers with different thicknesses and at different velocities. Moreover, discussions are also launched to calculate the numerical range of the primary-secondary air flow ratio, pressure drop and the water-drenching density for the indirect evaporative cooler, the air velocity, water-drenching density and pressure drop range suitable for fillers of different thicknesses, and for different kinds of indirect evaporative coolers.