COOLING TOWERSDOE-HDBK-1018/2-93Miscellaneous Mechanical Componentstower will flow in at the bottom and contribute to the air circulation within the tower. The aircirculation will be self perpetuating due to the density difference between the warmer air insideand the cooler air outside. Figure 12 Natural Convection Cooling TowerThe incoming water is sprayed around the circumference of the tower and cascades to thebottom. The natural convection cooling towers are much larger than the forced draft coolingtowers and cost much more to construct. Because of space considerations and cost, naturalconvection cooling towers are built less frequently than other types.ME-05Rev. 0Page 22
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