In this paper, effects of evaporative coolers on performances of six similar gas turbine power cycles were studied in one day. All required data were collected every five minutes from 09:00 till 16:00. Up to 12:00, evaporative coolers were out of services and therefore, there was a good chance to study the effect of evaporative coolers on a gas turbine under the operation. Moreover, since all these gas turbine power cycles are similar, the degree of uncertainty and validity of results are more judicable.
It was shown that besides the positive effect of cooling the inlet air, humidification by itself has an undeniable effect on increasing the power generation. Three parameters were assumed as the main sources of increasing the power generation in humidified condition: changes in the air mass flow rate, changes in the behavior of units equipment and finally changes in the air properties thermodynamically. Only the effect of the third parameter can be ignored
evaporative cooler, gas turbine, humidification, ideality coefficient
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