Tuesday, November 9, 2010

Cooling towers

Cooling towers has come a long way ever since it was invented; it helps a lot in transforming the excessive amount of heat into one that gives much comfort and gives cooling effect to humans. It is designed and made in different types; however their effectiveness still remains the same.
Here are the several types of cooling towers:


 Atmospheric cooling tower which does not use mechanical fan to make the air flow to the tower, its air derived from the natural stimulation flow supplied by pressure spray.
 Mechanical draft on the other hand, uses more than one fan to be able to move the large sum of air through the cooling tower. It is however divided into two classes of cooling towers, the forced draft and induced draft cooling towers.
With respect as to how the water falls, either class may be counter blow or cross flow types of air flow. Cross flow specifies that the airflow horizontally fills a certain portion of the tower while counter flow simply implies that the direction of the air flow is heading the other direction of the water.
o Forced draft- its fan forces the air into a low velocity straight through the packing and then perpendicularly against the descending flow of water that happens on each side.
o Induced draft however, which has one or more fans draw the air ascendant going against the descending flow of the water passing around the wooden deck. Because of the airflow’s opposite direction from the water flow, the coolest water at the base is in touched with the humid air, which results in greater efficiency of air transfer.
 Hybrid draft- is fitted with automatic draft fans to enhance the flow of air. They are likewise known as fan-assisted natural damp towers, its design is intended to reduce the energy needed for the movement of the air; with the hope of least possible mass cost collision.
 Spray-filled cooling tower- doesn’t have a heat transfer effect surface; it relies on the water fragment provided by the circulation system to uphold total water to air flow.


These are just some of the several types of cooling towers that you may find that are still in use today. To fins more such kinds of cooling towers, the internet provides a lot of information which would practically help you understand more on how such complicated yet useful mechanical machines were built.

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