Cooling Tower

Cooling Tower

Cooling towers are an integral component of many industries , providing comfort or process cooling across a broad range of applications. Cooling towers represent the point in a cooling system where heat is dissipated to the atmosphere through evaporation. Cooling towers are commonly used in industrial applications and in large commercial buildings to release waste heat extracted from a process or building system through evaporation of water.

Principle of operation

Cooling towers reject heat from water-cooled systems to the atmosphere. Hot water from the system enters the cooling tower and is distributed over the fill (heat transfer surface). Air is induced or forced through the fill, causing a small portion of the water to evaporate. This evaporation removes heat from the remaining water, which is collected in the cold water basin and returned to the system to absorb more heat. Each cooling tower line, although operating under the same basic principle of operation, is arranged a little differently.


There are two main configurations of factory assembled cooling towers: crossflow and counterflow. In crossflow cooling towers, the water flows vertically down the fill as air flows horizontally across. In counterflow cooling towers, the water flows vertically down the fill as air flows vertically up.

Water Distribution System.

Cooling towers employ either gravity distribution or pressurized spray systems to distribute water over the fill. Gravity systems, employed on crossflow cooling towers, feature hot water basins mounted on top of the tower above the fill. A series of spray nozzles in each hot water basin distribute the water evenly over the fill. Gravity distribution systems generally require minimal pump head, can be inspected while the unit is in operation and are easy to access for routine maintenance and service.

Spray distribution systems, employed on counterflow cooling towers, feature a series of PVC branches or pipes fitted with spray nozzles mounted inside the tower above the fill. These systems typically require 2 to 7 psi water pressure at the water inlet and require the unit to be out of service for inspection and maintenance

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PROTEC is a privately owned company established in Doha, Qatar engaged in the fields of Engineering, Supply, Construction, Installation, Commissioning, Operation and Maintenance of various types of equipment for the Water, Waste Water, Energy, and Industrial markets.


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