Counter Flow Induced Draft Cooling Towers

Counter Flow Induced Draft Cooling Towers Points : counter flow induced draft cooling towers In a counter flow induced draft cooling tower as shown in figure (1) given below the fan is located down stream from the fill at the air exit. The fan through the intake louver or more simply an opening covered by wire mesh draws atmospheric air. Water from the condenser or recalculating water from the coil or a mixture of the tow is evenly sprayed over the fill and falls down into the water basin.

Air is extracted across the fill and comes in direct contact with water film. Because of the evaporation of a small portion of the condenser water usually it falls down through the fill counter current to the extracted air the air steam absorbs evaporated water vapor. Large water droplets entrained in the air stream are collected by the drift eliminators. Finally the air stream and drift are discharged at the top exit. Drift or carry over is the Minute water droplets entrained in the air stream discharged out of the rower the evaporatively cooled waterfalls into the water basin and flows to the condenser In a counter flow induced draft cooling tower the driest air contacts the coldest water. Such a condition air is drawn through the fill more evenly by the induced draft fan and is discharged at higher exhaust air velocity and even velocity distributions reduce the possibility of exhaust air reticulation. Compared with the cross flow induced draft cooling tower the vertical height from the tower is great and therefore requires a higher pump head.