The portable evaporative air conditioner is a common appliance for cooling indoor air in some parts of the world. Evaporative air conditions are also referred to as swamp coolers, possibly because of the humidity they add to the air.
How It Works
As the name suggests, an evaporative air cooler cools air through evaporation. A fan inside the case blows air across water-saturated sponges or pads. The movement of the air across the wet surface causes the water to dry, or evaporate. As it does, the temperature drops, and cool air blows out of the fan and into the room.
History
According to the consumer energy center, evaporative air cooling originated in Arizona during the early 20th century. Arizonans stayed cool at night by using fans to pull cool air through wet blankets they hung in their screened-in sleeping porches.
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| Portable Air Conditioner |
Where It's Used
Portable air conditioner are most common in desert regions, where the air is very dry. Evaporative air cooler needs dry air, because the water won't evaporate sufficiently in more humid environments.
Pros and Cons
Evaporative air cooler use far less energy than other types of air conditioning. However, they can cause extreme humidity if the air in your home isn't dry enough to allow the moisture in the air to evaporate.
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