Q3: Wet material, containing 70% moisture on a wet basis, is to be dried at the rate of 0.15 kg/s in a counter-current dryer to give a product containing 5% moisture (both on a wet basis). The drying medium consists of air heated to 373 K and containing water vapor with a partial pressure of 1.0 kN/m². The air leaves the dryer at 313 K and 70% saturated. Calculate how much air will be required to remove the moisture. The vapor pressure of water at 313 K may be taken as 7.4 kN/m².

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
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Q3: Wet material, containing 70% moisture on a wet basis, is to be dried at the rate of
0.15 kg/s in a counter-current dryer to give a product containing 5% moisture (both on a
wet basis). The drying medium consists of air heated to 373 K and containing water
vapor with a partial pressure of 1.0 kN/m². The air leaves the dryer at 313 K and 70%
saturated. Calculate how much air will be required to remove the moisture. The vapor
pressure of water at 313 K may be taken as 7.4 kN/m².
Transcribed Image Text:Q3: Wet material, containing 70% moisture on a wet basis, is to be dried at the rate of 0.15 kg/s in a counter-current dryer to give a product containing 5% moisture (both on a wet basis). The drying medium consists of air heated to 373 K and containing water vapor with a partial pressure of 1.0 kN/m². The air leaves the dryer at 313 K and 70% saturated. Calculate how much air will be required to remove the moisture. The vapor pressure of water at 313 K may be taken as 7.4 kN/m².
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