Evaporative Cooling System Sketch

The most common way of accomplishing evaporative cooling in a greenhouse is with a fan and pad system figure 1.

Evaporative cooling system sketch.

Unlike central air conditioning systems that recirculate the same air evaporative coolers provide a steady stream of fresh air into the house. An evaporative cooling system consists of an intake chamber filter s supply fan direct contact or indirect contact heat exchanger exhaust fan water sprays re circulating water pump and water sump. Note that swamp coolers can be considered stand alone evaporative cooling systems but otherwise operate similarly as pad and fan systems. For more information on evaporative cooling systems and how they work please visit http cosaf co uk or http cosaf ae.

The basis of any evaporative cooling system is the evaporation of water into an airstream. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in order to evaporate. The coolest area of the greenhouse is adjacent to the evaporative cooling pads. Typical fan and pad greenhouse arrangement.

The fan draws dry hot air into the machine and across the cooler pads these thick pads absorb water from the reservoir and. Evaporative cooling systems are characterised by low energy use compared with refrigeration cooling. An evaporative cooler also swamp cooler swamp box desert cooler and wet air cooler is a device that cools air through the evaporation of water. Evaporative coolers cost about one half as much to install as central air conditioners and use about one quarter as.

Pad and fan systems are part of a greenhouse s mechanical ventilation system. An evaporative cooling system takes basic evaporation and automates it to efficiently lower the temperature of the air in your home. Evaporative cooling differs from typical air conditioning systems which use vapor compression or absorption refrigeration cycles. When operating an evaporative cooler windows are opened part way to allow warm indoor air to escape as it is replaced by cooled air.