Miscellaneous Mechanical Components
DOE-HDBK-1018/2-93
COOLING TOWERS
The cooling of the water in a cooling tower is accomplished by the direct contact of water and
air. This cooling effect is provided primarily by an exchange of latent heat of vaporization
resulting from evaporation of a small amount of water and by a transfer of sensible heat, which
raises the temperature of the air. The heat transferred from the water to the air is dissipated to
the atmosphere.
Induced Draft Cooling Towers
Induced draft cooling towers, illustrated in Figure 11, are constructed such that the incoming
circulating water is dispersed throughout the cooling tower via a spray header. The spray is
directed down over baffles that are designed to maximize the contact between water and air. The
air is drawn through the baffled area by large circulating fans and causes the evaporation and
the cooling of the water.
Figure 11 Induced Draft Cooling Tower
Rev. 0
ME-05
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