Ambient air at 34°C db-temperature and 21°C wb-temperature enters an air washer whose face area is 1.2 m2 . The mass flow rate of air is 2.1 kgsí1 . The relative humidity of the air at the exit is...

Ambient air at 34°C db-temperature and 21°C wb-temperature enters an air washer whose face area is 1.2 m2 . The mass flow rate of air is 2.1 kgsí1 . The relative humidity of the air at the exit is 57%. The pressure is constant at 101.3 kPa. For the flow situation in the air washer, the volumetric mass transfer coefficient, hd Av = 1.4 kgsí1 mí3 . Calculate (i) the efficiency of the air washer, and (ii) the length of the air washer