In a counter-flow cooling
tower the
air moves vertically upwards through the fill while waterfalls
vertically downwards. Film type fill is used and is suitable for
all cooling load applications, however, it is more suitable for the
application where cold water temperature is critical and water
quality is good. 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 mechanicals such as axial flow fans, gear boxes and
drive shafts.
 RCC
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; however, 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 timber whereas for normal temperature
applications it is made of PVC.Â
