Spray cooling is a technique for cooling and either humidifying or dehumidifying air by contacting it with a spray of liquid water. Inlet water Inlet

Spray cooling is a technique for cooling and either humidifying or dehumidifying air by contacting it with a spray of liquid water.

The liquid water leaving the tower is recirculated and, in the case of dehumidification, cooled before reentering the tower.

Two possible paths on the psychrometric chart corresponding to two different entering liquid temperatures are shown below. On the chart, T₀ and T_dp are the dry-bulb temperature and dew point, respectively, of the entering air.

Inlet water Inlet water Two (C) Two (C) Outlet air Outlet air T, (C) h1 (kg W/kg dry air) T2 (C) h, (kg W/kg dry air) MCOOLER Inlet air Inlet air To ("C) ha (kg W/kg dry air) To (C) h (kg W/kg dry air) Makeup Water water removed HUMIDIFICATION DEHUMIDIFICATION -D