Cooling through evaporation is a natural occurrence. The most common example we allexperience is perspiration, or sweat. As perspiration evaporates it absorbs heat to cool yourbody.The principle underlying evaporative cooling is the fact that water must have heat appliedto it to change from a liquid to a vapor. When evaporation occurs, this heat is taken fromthe water that remains in the liquid state, resulting in a cooler liquid.Evaporative cooling systems use the same principle as perspiration to provide cooling formachinery named as air washer unit.
