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AF A single-effect evaporator operated at 100 kPa is used to concentrate 5 wt.% NaOH solution at 110°C and 200 kPa to 8 wt.%. The evaporator is heated by a saturated steam at 120 °C where the heat transfer area is 50 m². The overall heat transfer coefficient is 2000 J/m².s.K. The molar mass of NaOH is 40 kg/kg mol. a) what is the feed flow rate, the product flow rate and the generated vapor flow rate? b) what is the steam needed for this operation? c) what is the steam economy for this evaporator?

AF A single-effect evaporator operated at 100 kPa is used to concentrate 5 wt.% NaOH solution at 110°C and 200 kPa to 8 wt.%. The evaporator is heated by a saturated steam at 120 °C where the heat transfer area is 50 m². The overall heat transfer coefficient is 2000 J/m².s.K. The molar mass of NaOH is 40 kg/kg mol. a) what is the feed flow rate, the product flow rate and the generated vapor flow rate? b) what is the steam needed for this operation? c) what is the steam economy for this evaporator?

Introduction to Chemical Engineering Thermodynamics
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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AF A single-effect evaporator operated at 100 kPa is used to concentrate 5 wt.% NaOH solution at 110°C and 200 kPa to 8 wt.%. The evaporator is heated by a saturated steam at 120 °C where the heat transfer area is 50 m². The overall heat transfer coefficient is 2000 J/m².s.K. The molar mass of NaOH is 40 kg/kg mol. a) what is the feed flow rate, the product flow rate and the generated vapor flow rate? b) what is the steam needed for this operation? c) what is the steam economy for this evaporator?
Transcribed Image Text:AF A single-effect evaporator operated at 100 kPa is used to concentrate 5 wt.% NaOH solution at 110°C and 200 kPa to 8 wt.%. The evaporator is heated by a saturated steam at 120 °C where the heat transfer area is 50 m². The overall heat transfer coefficient is 2000 J/m².s.K. The molar mass of NaOH is 40 kg/kg mol. a) what is the feed flow rate, the product flow rate and the generated vapor flow rate? b) what is the steam needed for this operation? c) what is the steam economy for this evaporator?
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