An experimental investigation of the performance of a fresh air handling unit integrating indirect evaporative and vapor compression cooling is conducted. Temperature and relative humidity measurements at main points within the cooling unit were logged using a wireless data acquisition system. Experimental data downloaded from the acquisition system is used for linear regression analysis, and to calculate the wet-bulb thermal effectiveness, cooling capacity and coefficient of performance of the unit. The air conditioning unit is...

Evaporative cooling can be integrated into fresh-air-handling units, to reduce cooling demand. This study considers a hybrid fresh-air-handling unit which incorporates a vapor-compression cooling cycle and indirect evaporative cooling to condition an ambient primary airstream to a desired supply air state. The cooling eects of using various modes (vapor compression only; direct expansion with mist; direct expansion with water shower; and direct expansion with mist and water shower) are compared when the fresh-air-handling unit operates...