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Experimental investigation of the thermal performance of wet cooling tower with splash fills packing

With the increasing intensity of the ecological and environmental problems
 and the scarcity of fresh water, this paper was introduced to investigate
 the ability to use treated wastewater as a cooling media via studying its
 behavior throughout a cooling tower. The simultaneous transfer of heat and
 mass from the treated wastewater to air over splash-fill packing arranged in
 a zigzag manner was studied. The characteristic of the cooling tower (CCT),
 the outlet water temperature, and the rejected heat were investigated as the
 water-to-air ratio and inlet water temperature were varied. The core results
 show that the CCT of the tower decreases with increasing water-to-air ratio,
 and increases with the raise of inlet water temperature. Moreover,
 relationships between CCT and water-to-air ratio were obtained for each. It
 was also observed that the outlet water temperature increases gradually with
 increasing water-to-air ratio and temperature, and the difference between
 the inlet and outlet temperature becomes larger by increasing the inlet
 temperature. The heat rejected value increases with increasing the airflow
 rate, water flow rate, and temperature. This study revealed that CCT of
 splash fills arranged in a zigzag manner was higher compared to other types
 of packing. In the same time, the results for the treated wastewater and
 fresh water were very close that gives approximate behavior, and this can
 save a huge amount of fresh water for other humanistic utilization, along
 with taking benefit from the treatment process of wastewater instead of
 through it into the aquatic systems.