Evaporative Cooling System Sketch

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Evaporative cooling system sketch.

The most common way of accomplishing evaporative cooling in a greenhouse is with a fan and pad system figure 1. The coolest area of the greenhouse is adjacent to the evaporative cooling pads. They produce cool and humid air and are. Evaporative cooling systems are characterised by low energy use compared with refrigeration cooling.

When operating an evaporative cooler windows are opened part way to allow warm indoor air to escape as it is replaced by cooled air. An evaporative cooling system takes basic evaporation and automates it to efficiently lower the temperature of the air in your home. Evaporative cooling uses the fact that water will absorb a relatively large amount of heat in order to evaporate. Note that swamp coolers can be considered stand alone evaporative cooling systems but otherwise operate similarly as pad and fan systems.

Evaporative coolers cost about one half as much to install as central air conditioners and use about one quarter as. In general the machine will consist of a fan a thick pad a water reservoir and some additional controls for fine tuning the results. The basis of any evaporative cooling system is the evaporation of water into an airstream. Unlike central air conditioning systems that recirculate the same air evaporative coolers provide a steady stream of fresh air into the house.

Evaporative cooling differs from typical air conditioning systems which use vapor compression or absorption refrigeration cycles. Pad and fan systems are part of a greenhouse s mechanical ventilation system. The fan draws dry hot air into the machine and across the cooler pads these thick pads absorb water from the reservoir and. Two evaporative cooling systems are commonly used in greenhouses.