TC Selection & Sizing

Principle

A cooling tower is a specialized heat exchanger in which air and water are brought into direct contact with each other to affect the transfer of heat. Both sensible heat and latent heat of vaporization are used to transfer heat to the atmosphere. Heat is removed nearly 2430 kJ from the water that remains for each kilogram of water that a cooling tower evaporates. The more evaporation that takes place, the more heat that is removed. Additional heat is taken away by the air by virtue of its temperature increase but this sensible heat exchange is minor compared to the latent component provided by the water's phase change.

Selection

Cooling towers are selected base on the water flow rate, water inlet temperature, water outlet temperature and ambient wet bulb temperature. The performance of the cooling tower in terms of the temperature of the cooling tower outlet is a function of the wet bulb temperature of the ambient air and the tower type, size, design, and operation. Therefore you should select tower base on your operational data associated with the system along with tower manufacturers' selection tables or charts.

The temperature difference between the cooling tower outlet and the wet bulb temperature is referred to as the "approach". The temperature difference between the cooling tower inlet and outlet is referred to as the "range".

It should be noted that the tower size increases as the wet bulb rises and that the size increase becomes dramatic as the approach is less than 5.56C.

A Web Browser-Based Program for Selecting Cooling Tower

To use our selection program, you should know the water flow rate, water inlet temperature, water outlet temperature and ambient wet bulb temperature. If you are ready, let's go.....Yes let's go