Two types of RCC Cooling Tower
1) Cross flow 2)Counter Flow
Induced Draft Counter Flow
In a counter-flow cooling tower the air moves vertically through the fill while water falls vertically. Film type fill is used and is suitable for all cooling load applications. These cooling towers are made of RCC construction. Film type fill is made of PVC for normal water applications. These cooling towers are fitted with the fills of wider flute so that it can withstand most of the industrial water. The film type fill should be avoided for the applications where water has traces of oil and contaminated water. In the case of contaminated water PVC ‘V’ bars and grid can be used. Cooling towers are fitted with high efficiency machines such as exhaust fans, gear boxes and drive shafts.
Induced Draft Cross Flow
In a cross-flow cooling tower air moves through the fill horizontally and water falls vertically. The fill used is splash type fill and is suitable for cooling all load applications. It is more suitable for the application where water has higher suspended solids which can be a problem for film fill cooling tower operation. These cooling towers are made of RCC. For high temperature applications the splash fill is made of chemically treated Pine wood whereas for normal temperature applications it is made of PVC. It can be of rectangular or ‘V’ bar shape. The fill is supported on a SS-304 grid. Cooling towers are fitted with high efficiency mechanical parts such as exhaust fans, gear boxes and drive shafts.
