What should be the approach / reference for mathematical model for cooling tower?

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Adil Sharag-Eldin

Consult Chapter 40, "Cooling Towers". 2016 ASHRAE Handbook: HVAC Systems and Equipment

A. M. Abdallah

Dear Dilip Swami

I think the links may be useful

https://core.ac.uk/download/pdf/4891001.pdf & Article Mathematical Modeling of Evaporative Cooling of Water in a M...

& Cooling Towers. Selection, Design and Practice

Cheremisinoff N.P., Cheremisinoff P.N.

Also, the reference that Prof.Dr. Adil Sharag-Eldin are very important

With Best Wishes.

Dudley J Benton

I've been modeling and testing cooling towers for 40 years. There are a lot of publications as well as free software on my web site http://dudleybenton.altervista.org You can go simple to complex--an excel spreadsheet function to CFD. Do you want to design or evaluate towers? Many cooling towers are being built right now in India. The company I work for does cooling tower performance testing in India.