Turbo Vent - Evaporative cooling: The evaporative cooling process

Evaporative cooling: The evaporative cooling process

The evaporative cooling process

In an evaporative cooler, such as Breezair, a pump circulates water from a reservoir tank to the top of absorbent cooling pads. The pads become saturated with water as the water descends by gravity back into the tank. Powerful centrifugal fans draw warm air from outside through the wet pads. As the air passes through the pads it is cooled by evaporation and the cooled air is then circulated around the building.

Evaporative air-cooling systems should not re-circulate air as this will result in hot and humid conditions. Air from an evaporative cooler should be used once only and should move from the cooler, into the air cooled area and then out of the building. Constant cool air movement pushes heat out along with stale air, smoke, odours and pollution.

Evaporative air-cooling is particular suitable for commercial and industrial applications, where compressor-type air conditioning is prohibitively expensive. Quick and easy to install, coolers are fitted to the exterior of the building, either on the roof, the sidewalls or at ground level. A system of ductwork and air diffusers is then used to channel the cool air to where it is needed. Rigid pre-fabricated metal ducts are the most common, but for some installation flexible ducts can be used. For spot cooling in factories and warehouses,vertical ducts with plenum boxes are also common.