What is adiabatic humidification?
There are basically three physical methods of air humidification: Vaporization, evaporation and atomization.
The essential difference between these methods lies in the fact that air in adiabatic methods is cooled down. However, the air remains the same in case of steam humidification.
Steam does not require additional energy to enter into the air state since it is already gaseous.By contrast, water preserves its state. It requires energy in order to change to a different state, and draws this energy from the surrounding air. As a result, the air in an adiabatic humidification process cools off by a certain amount.
If this cooling is not desired, the air must be heated either before or after the humidification process. Since warmer air absorbs humidity better than colder air, it makes more sense to heat the air before humidification.
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