A single-effect evaporator Is used to concentrate a feed solution of organic
colloids from 6 to 50 wt %. The solution has a negligible boiling-point elevation.
The heat capacity of the feed is 4.06 kJ kg'' K™ and the feed enters at 15.6°C.
Saturated steam at 101.32 kPa absolute is available for heating, and the
absolute pressure in the vapour space of the evaporator is 15.3 kPa. A total of
4536 kg hr of water is to be evaporated. The overall heat transfer coefficient is.
1988W M2 KL 5= 100C fiom steam tables