Counter Flow Forced Draft Cooling Tower

Counter Flow Forced Draft Cooling Tower Points : counter flow forced draft cooling tower In a counter flows forced draft cooling tower as shown in fig (3) the fan is positioned at the bottom air intake i.e. on the upstream side of the fill. Condenser water sprays over the fins from the top and fall down to the water basin. Air is forced across the fins and comes in direct contact with the water. because of the evaporation of the water its temperature gradually decreases as it flow down along the fill in counter flow arrangements with air. In the air steam, large water droplets are intercepted-near the exit by the eliminator. Finally the air stream containing drift is discharged at the top opening.

Because the fan is located near the ground level, the vibration of the counter flow forced draft tower is small compared with that of the induced draft tower. Also the centrifugal fan flows towards the water surface, there is a better evaporative cooling effect over the water basin. However the disadvantage of this type of cooling tower induced the uneven distribution of air flow.ing through the fins, which cause by the forced draft fan in addition, the high intake velocity may recapture a portion of the warm and humid exhaust air. Counter flow forced draft cooling tower are often used in small and medium size installations.

The preceding types of cooling tower, which is used in evaporation of water to cool and the condenser water is sometimes called wet towers. There is also a kind of cooling tower called a dry tower it is essentially a dry cooler a finned coil and induced fan combination that cools the condenser water flowing inside the tubes.