When the temperature is raised, it will allow more evaporation to take place. When pressure is raised, the process of evaporation is reduced. The size of water droplet affects the rate of evaporation. These are two different processes.
Cooling towel has plenty of heat to support evaporation leading to temperature drop.
If you wish to calculate the effect of water, you can read the following:
http://www.aquamist.co.uk/rescr/faq/...s.html#results
It is not too complicated to understand if you think of the process as enthalpy change.