A single-effect evaporator is concentrating a feed so 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is ep 4.06 kJ/kg. K and the feed enters at 15.6°C. Saturated steam at 101.32 kPa is available for heating, and the pressure in the vapor space of the evaporator is 15.3 kPa. A total of 4536 kg/h of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m2. K. What is the required surface area in m2, the steam consumption and the steam economy? State and explain 3 factors that may affect the process of evaporation.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
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A single-effect evaporator is concentrating a feed so
50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the
feed is ep 4.06 kJ/kg. K and the feed enters at 15.6°C. Saturated steam at 101.32 kPa
is available for heating, and the pressure in the vapor space of the evaporator is 15.3
kPa. A total of 4536 kg/h of water is to be evaporated. The overall heat-transfer
coefficient is 1988 W/m2. K.
What is the required surface area in m2, the steam consumption and the steam economy?
State and explain 3 factors that may affect the process of evaporation.
Transcribed Image Text:A single-effect evaporator is concentrating a feed so 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is ep 4.06 kJ/kg. K and the feed enters at 15.6°C. Saturated steam at 101.32 kPa is available for heating, and the pressure in the vapor space of the evaporator is 15.3 kPa. A total of 4536 kg/h of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m2. K. What is the required surface area in m2, the steam consumption and the steam economy? State and explain 3 factors that may affect the process of evaporation.
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