A solution of organic colloids in water is to be concentrated from 10 to 50% solids in a single effect evaporator. Steam is available at a gauge pressure of 1.03 atm. A pressure of 102 mmHg is to be maintained in the vapor space. The feed rate to the evaporator is 25000 kg/hr. The overall heat transfer coefficient can be taken as 2800 Wim2-0C. The solution has a negligible elevation in boiling point and a negligible heat of dilution. The specific heat of the feed solution is 3.77 Jlg-C. Calculate the steam economy. a. 0.75 S0.89 b. 0.95 d. 1.03
A solution of organic colloids in water is to be concentrated from 10 to 50% solids in a single effect evaporator. Steam is available at a gauge pressure of 1.03 atm. A pressure of 102 mmHg is to be maintained in the vapor space. The feed rate to the evaporator is 25000 kg/hr. The overall heat transfer coefficient can be taken as 2800 Wim2-0C. The solution has a negligible elevation in boiling point and a negligible heat of dilution. The specific heat of the feed solution is 3.77 Jlg-C. Calculate the steam economy. a. 0.75 S0.89 b. 0.95 d. 1.03
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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Transcribed Image Text:A solution of organic colloids in water is to be concentrated from 10 to 50% solids in a single effect evaporator. Steam is available at a gauge
pressure of 1.03 atm. A pressure of 102 mmHg is to be maintained in the vapor space. The feed rate to the evaporator is 25000 kg/hr. The overal
heat transfer coefficient can be taken as 2800 W/m2-0C. The solution has a negligible elevation in boiling point and a negligible heat of dilution.
The specific heat of the feed solution is 3.77 Jig-DC. Calculate the steam economy.
a. 0.75
S0.89
b. 0.95
d. 1.03
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