In this study, a mathematical model is presented to describe the dynamic th
ermal behavior of counterflow cooling towers that contain packing materials
. The proposed model takes into account both the sensible and latent hear c
ooling effects on the tower performance. Closed-form solutions are obtained
for the transient and steady temperature distribution within the cooling t
ower Under steady-state conditions, a mathematical criterion is derived to
obtain the proper length of the cooling tower that is sufficient to ensure
complete cooling for the hot water stream.