Q21 A- A triple effect backward feed evaporator are used to concentrate NaOH solution of 10. percent and 1.25 Kg/s of feed which is initially at 297 K, using steam at 393 K and a vacuum such that the boiling point in the last effect is 325 K. If the total water vaporized from the three effects was only one kilogram per second, what are the steam consumption, the heat transfer areas, and the concentration for each effect. Assume the heat capacity of liquid 4.187 KJ/ Kg.K and the overall heat transfer coefficients are 2.5, 2, and 1.6 KW/m². K. respectively. Cp= 4.81kg/kg.k
Q21 A- A triple effect backward feed evaporator are used to concentrate NaOH solution of 10. percent and 1.25 Kg/s of feed which is initially at 297 K, using steam at 393 K and a vacuum such that the boiling point in the last effect is 325 K. If the total water vaporized from the three effects was only one kilogram per second, what are the steam consumption, the heat transfer areas, and the concentration for each effect. Assume the heat capacity of liquid 4.187 KJ/ Kg.K and the overall heat transfer coefficients are 2.5, 2, and 1.6 KW/m². K. respectively. Cp= 4.81kg/kg.k
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:Q2\ A- A triple effect backward feed evaporator are used to concentrate NaOH solution of 10.
percent and 1.25 Kg/s of feed which is initially at 297 K, using steam at 393 K and a vacuum such
that the boiling point in the last effect is 325 K. If the total water vaporized from the three effects
was only one kilogram per second, what are the steam consumption, the heat transfer areas, and
the concentration for each effect. Assume the heat capacity of liquid 4.187 KJ/ Kg.K and the
overall heat transfer coefficients are 2.5, 2, and 1.6 KW/m². K. respectively. Cp= 4.81kg/kg.k
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