(Solved): 2.4-10. Surface Area and Steam Consumption of an Evaporator. A single-effect evaporator is concentr ...
2.4-10. Surface Area and Steam Consumption of an Evaporator. A single-effect evaporator is concentrating a feed solution of organic colloids from 5 to 50wt%. The solution has a negligible boilingpoint elevation. The heat capacity of the feed is cp=4.06kJ/kg⋅K(0.97btu/lbm⋅∘F) and the feed enters at 15.6∘C(60∘F). Saturated steam at 101.32kPa is available for heating, and the pressure in the vapor space of the evaporator is 15.3kPa. A total of 4536kg/h(10000lbm/h ) of water is to be evaporated. The overall heat-transfer coefficient is 1988W/m2⋅K(350btu/h⋅∘F). What is the required surface area in m2 and the steam consumption?