A forced-circulation triple-effect evaporator using forward feed is to be used to concentrated a 10 wt% NaOH solution entering at 37.8°C to 50%. The steam used enters at 58.6 kPa gauge. The absolute pressure in the vapor space of the third effect is 6.76 kPa. The feed rate is 13 608 kg/h. The heat transfer coefficients are U1 = 6246, U2 = 3407, U3 = 2271 W/m2 -K. All effects have the same area. Calculate the surface area, steam consumption, and steam economy.
A forced-circulation triple-effect evaporator using forward feed is to be used to concentrated a 10 wt% NaOH solution entering at 37.8°C to 50%. The steam used enters at 58.6 kPa gauge. The absolute pressure in the vapor space of the third effect is 6.76 kPa. The feed rate is 13 608 kg/h. The heat transfer coefficients are U1 = 6246, U2 = 3407, U3 = 2271 W/m2 -K. All effects have the same area. Calculate the surface area, steam consumption, and 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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A forced-circulation triple-effect evaporator using forward feed is to be used to concentrated a 10 wt% NaOH solution entering at 37.8°C to 50%. The steam used enters at 58.6 kPa gauge. The absolute pressure in the vapor space of the third effect is 6.76 kPa. The feed rate is 13 608 kg/h. The heat transfer coefficients are U1 = 6246, U2 = 3407, U3 = 2271 W/m2 -K. All effects have the same area. Calculate the surface area, steam consumption, and steam economy.
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