Essay On Cooling Tower

Now a day’s large numbers of industries are using cooling towers to remove heat and extract cold water for condensation purposes. Hot water coming from the processes gets cool in Cooling Tower by Evaporative Cooling principle [1]. A cooling tower is heat rejection equipment, which extracts waste heat from the water droplets to the atmosphere by cooling it to a lower temperature. This type of heat transfer or rejection in a cooling tower is termed "evaporative" in that it allows a portion of the water being cooled to provide a significantly higher quantum of cooling to the remaining stream of water. The heat from the water stream transferred to the air stream raises the air's temperature and its moisture content to 100%, and this air is discharged to the atmosphere. Evaporative heat rejection equipments such as cooling towers are commonly used to provide significantly lower water temperatures than what can be achieved by air cooled or dry heat rejection devices, like a car radiator, thereby achieving more cost-effective and energy efficient process of cooling. An example of evaporative cooling can be personified when something hot is rapidly cooled by putting water on it, which evaporates, cooling rapidly. The cooling potential of a wet surface is much better than a dry one.

Wet type cooling tower is considered as the most

Cooling towers are broadly classified on the basis of air circulation i.e. type of draft like natural draft, mechanical draft and natural and mechanical draft. On the basis of the relative movement of air and water, these towers can be grouped as counter flow and cross flow types. Mechanical draft tower uses fan or blower to provide the required volume of air flow through the tower. They are further subdivided in Forced draft and Induced draft towers, depending upon the location of the fans or