According to Wikipedia the origins of evaporative cooling can be traced back as far as ancient Egypt and Persia thousands of years ago to a simple type of evaporative cooler called the ‘windcatcher’, which used wind shafts on the roofs of buildings. In extremely dry climates, evaporative cooling of air also has the added benefit of increasing the relative humidity by adding moisture to the air thereby helping to create a more comfortable environment.Įvaporative cooling is not a new technology, in fact it is quite ancient. As mentioned above one of the main benefits to using evaporative cooling is that it can remove heat from the air using much less energy than refrigeration. Using this process the temperature of dry air can be significantly reduced through the phase transition of liquid water to water vapour, which just a fancy way of saying evaporation. Evaporative coolers use the fact that water has a large enthalpy of vaporization and will therefore absorb a relatively large amount of heat in order to evaporate. Evaporative cooling differs from traditional portable air conditioning systems, which use vapour-compression or absorption refrigeration cycles. In addition to this evaporative coolers also only use a fraction of the energy a portable air conditioning unit would, as there is no need for a compressor, which also helps support the environmental credentials.Įvaporative coolers can also be known as swamp coolers, swamp boxes, desert coolers and even wet air coolers and they use evaporation of water to remove the heat from warm, dry air. Rather that transferring the heat to a refrigerant such as R32, evaporative cooling uses only water and is therefore seen as a much more environmentally friendly method. Comparatively inexpensive to run and they don’t use environmentally unfriendly refrigerants, so it’s easy to see why they can be seen as a viable method of cooling in today’s more environmentally aware world.Įvaporative cooling is a water based alternative to portable air conditioning, which relies on the refrigeration process. As an alternative to traditional portable air conditioning units industrial evaporative coolers are growing in popularity. Evaporative cooling is a simple, effective method of cooling that doesn’t use refrigerant.
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