Wet towels at the Biltmore Hotel are dried in a continuous dryer after washing for use by hotel guests. The towels contain 45% water (by mass) when they enter the dryer and 3% water (by mass) when they exit the dryer. The slightly damp towels (3% water) exit the dryer at a rate of 850 kg/day. Hot, perfectly dry air (115°F, 1 atm) is also fed into the dryer. When the air leaves the dryer is has cooled to 100°F (1 atm still) and has a relative humidity of 55%. Determine the volumetric flowrate of air (m3/day) entering the dryer. Determine the mass flowrate of towels (kg/day) entering the dryer.

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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Wet towels at the Biltmore Hotel are dried in a continuous dryer after washing for use by hotel guests. The towels contain 45% water (by mass) when they enter the dryer and 3% water (by mass) when they exit the dryer. The slightly damp towels (3% water) exit the dryer at a rate of 850 kg/day. Hot, perfectly dry air (115°F, 1 atm) is also fed into the dryer. When the air leaves the dryer is has cooled to 100°F (1 atm still) and has a relative humidity of 55%.

Determine the volumetric flowrate of air (m3/day) entering the dryer.

Determine the mass flowrate of towels (kg/day) entering the dryer.

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