Tower Subclassifications and Configurations

Cooling towers are broadly classified on the basis of the type of draft natural draft (natural convection), mechanical draft (forced convection) and mechanical and natural. Further distinction is made based on (1) the type of flow—crossflow, counterflow, cocurrent flow (2) the type of heat dissipation—wet (evaporative cooling), dry, wet-dry and (3) the type 

WET-DRY PARALLEL FLOW A LEGEND X FANS WATER MANIFOLD C=i DRY FILL RACK  

These designs use a fan to move ambient air through the tower. They can be subdivided into two different types—indirect or forced air towers, 

These contain tiers of splash bars or decks to aid in the breakup of water drops to increase the total water surface and, subsequently, the evaporation rate. 

These depend only on spray nozzles for water breakup. 

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