Concentration of NaOH Solution in Triple - Effect Evaporator . A forced - circulation triple - effect evaporator using forward feed is to be used to concentrate a 10 wt % NaOH solution entering at 37.8 ° C to 50 % . The steam used enters at 58.6 kPa gage . 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 , and U₁ = 2271 W / m².K . All effects have the same area . Calculate the surface area and steam consumption . Ans

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
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Concentration of NaOH Solution in Triple - Effect Evaporator . A forced - circulation triple - effect evaporator using forward feed is to be used to concentrate a 10 wt % NaOH solution entering at 37.8 ° C to 50 % . The steam used enters at 58.6 kPa gage . 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 , and U₁ = 2271 W / m².K . All effects have the same area . Calculate the surface area and steam consumption . Ans

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