In this paper, a media evaporative cooling system installed in the gas turbines of the Fars (Iran) combined cycle power plant are mod-
eled and evaluated. In this model, di?erent design parameters such as inlet air velocity, geometric shape and sizes and depth of the media
have been considered. Analysis of the results shows that at a constant Prandtl number, the cooler e?ectiveness decreases and pressure
drop increases, as incoming air velocity increases. The water evaporation rate and temperature drop of the cooler have been calculated,
and the e?ects of temperature, relative humidity and pressure of the ambient have been investigated as well. The practical and analytical
results show that the output of a gas turbine of the Fars combined cycle power plant at 38 C ambient temperature and 8% relative
humidity is 11 MW more, and the temperature drop of the inlet air is about 19 C with media evaporative cooling installations. Because
of annual power augmentation of 5280 MWh and considering 2.5 Cents/kWh selling price for excess electricity generated, the payback
period obtained is about four years.
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