In a counter-flow Cooling
Towers in Pakistan air travels upward
through the fill or tube bundles, opposite to the downward motion of the water.
In a cross-flow Cooling towers
air moves horizontally through the fill as the water moves downward.
In operation the heat flows from the internal fluid circuit,
through the tube walls of the coils, to the external circuit and then by
heating of the air and evaporation of some of the water, to the atmosphere.
Operation of the indirect Cooling
Towers in Pakistan is therefore very
similar to the open Cooling towers with one exception. The process
fluid being cooled is contained in a "closed" circuit and is not
directly exposed to the atmosphere or the recirculated external water.
Cooling towers are also characterized by the
means by which air is moved. Some water is also lost by droplets being carried
out with the exhaust air (drift), but this is typically reduced to a very small
amount by installing baffle-like devices, called drift eliminators, to collect
the droplets. Mechanical-draft Cooling towers in Pakistan rely on power-driven fans to draw or force
the air through the tower.
Common applications for cooling towers are providing cooled water for air-conditioning, manufacturing and electric power generation. FRP Engineers have supplied Cooling Towers in Pakistan are designed to handle water streams of only a few gallons of water per minute supplied in small pipes like those might see in a residence, while the largest cool .
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