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Surface Area and Steam Consumption of an Evaporator. A single-effect evapo- rator is concentrating a feed solution of organic colloids from 5 to 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is c, = 4.06 kJ/kg - K (0.97 btu/lbF) and the feed enters at 15.6°C (60°F). Satu- rated 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 (10000lb/h) of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m² - K (3SO btu/h- ft?. °F). What is the required surface area in m? and the steam consump- tion?

Surface Area and Steam Consumption of an Evaporator. A single-effect evapo- rator is concentrating a feed solution of organic colloids from 5 to 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is c, = 4.06 kJ/kg - K (0.97 btu/lbF) and the feed enters at 15.6°C (60°F). Satu- rated 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 (10000lb/h) of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m² - K (3SO btu/h- ft?. °F). What is the required surface area in m? and the steam consump- tion?

Introduction to Chemical Engineering Thermodynamics
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
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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8.4-10. Surface Area and Steam Consumption of an Evaporator. A single-effect evapo- rator is concentrating a feed solution of organic colloids from 5 to 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is c, = 4.06 kJ/kg K (0.97 btu/lbF) and the feed enters at 15.6°C (60°F). Satu- rated 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 (10000 lb/h) of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m² · K (350 btu/h ft2F). What is the required surface area in m? and the steam consump- tion?
Transcribed Image Text:8.4-10. Surface Area and Steam Consumption of an Evaporator. A single-effect evapo- rator is concentrating a feed solution of organic colloids from 5 to 50 wt %. The solution has a negligible boiling-point elevation. The heat capacity of the feed is c, = 4.06 kJ/kg K (0.97 btu/lbF) and the feed enters at 15.6°C (60°F). Satu- rated 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 (10000 lb/h) of water is to be evaporated. The overall heat-transfer coefficient is 1988 W/m² · K (350 btu/h ft2F). What is the required surface area in m? and the steam consump- tion?
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