Miscellaneous Mechanical Components
tower will flow in at the bottom and contribute to the air circulation within the tower. The air
circulation will be self perpetuating due to the density difference between the warmer air inside
and the cooler air outside.
Figure 12 Natural Convection Cooling Tower
The incoming water is sprayed around the circumference of the tower and cascades to the
bottom. The natural convection cooling towers are much larger than the forced draft cooling
towers and cost much more to construct. Because of space considerations and cost, natural
convection cooling towers are built less frequently than other types.