Adiabatic Humidifier with Recirculation of Spray Water

In this system, the water is recirculated through the pipes to nozzles. That part of water which is not evaporated into the air stream, returns to the tank for recirculation. This process can be assumed as an adiabatic process with good approximation. The required make-up water supplied to the tank is:

The humidifying efficiency is usually expressed by the contact factor. Related topics:
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