Determination of Optimum Height for Counter Flow Cooling Tower


  • Ashraf Kotb Department of Mechanical Power Engineering, Ain Shams University, Cairo, EGYPT


Cooling Tower, Height, Evaporation Rate, Lewis Factor, One Dimensional


A model for counter flow cooling tower is present with treatments to recover the simplifications in the literature. The Bosnjakovic formula, mutative water and air properties are used to relax the constraints. The finite volumes of water and moist air are defined separately in opposite flow directions. Mass and energy balances are evaluated for control volume; heat and mass transfer are considered between control volumes. The model is validated with experimental data from literature. The model determines the cooling tower optimum height, evaporation rate and distribution of air and water temperatures, humidity, water flow and Lewis factor along the tower height. It is concluded that: the height is affected by the inlet air humidity; the heat transfer mode is dominated by evaporation, and Lewis factor ranges from 0.91 to 0.924.


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How to Cite

Kotb, A. (2013). Determination of Optimum Height for Counter Flow Cooling Tower. Asian Journal of Applied Science and Engineering, 2(2), 133-147. Retrieved from



Peer-reviewed Article