An evaporative cooler (also swamp cooler, desert cooler, and wet air cooler) is a device that cools air through the evaporation of water. Evaporative cooling differs from typical air conditioning systems which use vapor-compression. Unlike refrigeration, it requires a water source, and must continually consume water to operate. The evaporative cooler's water is only evaporated once.
Sooooo.... how does the dictionary tell me this thing works?????
Typically, residential and industrial evaporative coolers use direct evaporation and can be described as an enclosed metal or plastic box with vented sides containing a centrifugal fan or 'blower', electric motor with pulleys (known as 'sheaves' in HVAC), (or a direct-driven axial fan), and a water pump to wet the evaporative cooling pads. The units can be mounted on the roof (down draft, or downflow), or exterior walls or windows (side draft, or horizontal flow) of buildings. To cool, the fan draws ambient air through vents on the unit's sides and through the damp pads. Heat in the air evaporates water from the pads which are constantly re-dampened to continue the cooling process. Thus cooled, moist air is then delivered to the building via a vent in the roof or wall.
Because the cooling air originates outside the building, one or more large vents must exist to allow air to move from inside to outside. Air should only be allowed to pass once through the system, or the cooling effect will decrease
OK... so the family story was remembered by Mama on yesterday.... It was so hot and dry in that Frederick mid-July heat. And you were so miserable.. and fussy... that Not until Howard went and bought a water cooler. We laid you out on the floor... and you slept and you enjoyed that cool air!
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