[01] Saad Muhsen Saleh, Department of Mechanical Engineering, Baghdad University, Baghdad, Iraq. [02] Qasim Saleh Mahdi, Department of Mechanical Engineering, Al-Mustansiriyah University, Baghdad, Iraq. [03] Basima Salman Khalaf, Department of Mechanical Engineering, Al-Mustansiriyah University, Baghdad, Iraq.

This study is deals with the performance of natural draft wet cooling tower, using a suitable technique. This technique takes into account the effects of fill type, nozzle hole and hot water flow rate on the performance of cooling tower. The model dimensions were: top outlet diameter (370 mm), bottom diameter (680 mm) and height (850 mm). (210) test experiments were done in three parts, (48) for different water flow rate, (108) for different fill types and (56 tests) for different nozzle holes. Three cases were studied for film and splash fills, where for film the heights were (60, 90 and 120mm) and for splash fill (30, 45 and 60mm) heights were studied. The performance parameter of the tower such as range, approach, effectiveness and Merkel number were studied. Eighteenth new experimental relation was proposed for Merkel number and water to air mass flow rate ratio. And compared with previous works.

Cooling Tower, Natural Draft, Film Fill, Splash Fill

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