Fresh atmospheric air mixed with recycled air is heated to 349K and admitted to a drier at 101.3 KPa at a rate of 100 m³ /min. The relative humidity of the air entering the drier is 7.5%. Atmospheric...

Extracted text: Fresh atmospheric air mixed with recycled air is heated to 349K and admitted to a drier at 101.3 KPa at a rate of 100 m³ /min. The relative humidity of the air entering the drier is 7.5%. Atmospheric air is at 302K and has a relative humidity of 30%. The air leaves the drier at 306K and 90% relative humidity, a portion of which is recycled and the other portion discarded. The vapour pressures of water are 4KPa at 302K, 5KPA at 306K and 40KPA at 349K. Show the process flow diagram and calculate the following: (a) The ratio of wet recycle stream to wet fresh stream. (b) The mass of dry air to be fed to the drier to remove one kilogram of water in the drier. (c) The rate at which water is removed in kg/min.