Water at a temperature of 77?C is to be evaporated slowly in a vessel. The water is in a low pressure container which is surrounded by steam. The steam is condensing at 107?C. The overall heat transfer coefficient between the water and the steam is 1100 W/(m2 K). Calculate the surface area of the container which would be required to evaporate water at a rate of 0.01 kg/s.GIVENWater evaporated slowly in a low pressure vessel surrounded by steamWater temperature (Tw) = 77?CSteam condensing temperature (Ts) = 107?COverall transfer coefficient between the water and the steam (U) = 1100 W/(m2 K)Evaporation rate (mw ) = 0.01 kg/sASSUMPTIONSSteady state prevailsVessel pressure is held constant at the saturation pressure corresponding to77?C

Transcribed Image Text:

Water Vapor, mw= 0.01 kg/s - Saturated Steam, T- 107 °C Water 77°C Condensate