1. A single effect evaporator is concentrating a feed solution of organic solids from 5 to 40 wt.%. The solution has a negligible boiling point elevation. The heat capacity of the feed is 4.6 kJ/kg K and the feed enters at 20 °C. Saturated steam at 101.325 kPa is available for heating and the pressure in the vapor space is 15.3 kPa. A total of 4,000 kg/h of water is evaporated. The overall heat transfer coefficient is 2000 W/m²K. Calculate the required surface area, the steam consumption, and the steam economy.
1. A single effect evaporator is concentrating a feed solution of organic solids from 5 to 40 wt.%. The solution has a negligible boiling point elevation. The heat capacity of the feed is 4.6 kJ/kg K and the feed enters at 20 °C. Saturated steam at 101.325 kPa is available for heating and the pressure in the vapor space is 15.3 kPa. A total of 4,000 kg/h of water is evaporated. The overall heat transfer coefficient is 2000 W/m²K. Calculate the required surface area, the steam consumption, and the steam economy.
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
Problem 1.1P
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Heat and
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Transcribed Image Text:1. A single effect evaporator is concentrating a feed solution of organic solids from 5 to 40
wt.%. The solution has a negligible boiling point elevation. The heat capacity of the feed
is 4.6 kJ/kg K and the feed enters at 20 °C. Saturated steam at 101.325 kPa is available for
heating and the pressure in the vapor space is 15.3 kPa. A total of 4,000 kg/h of water is
evaporated. The overall heat transfer coefficient is 2000 W/m²K. Calculate the required
surface area, the steam consumption, and the steam economy.
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