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3) A granular material containing 40 per cent moisture is fed to a countercurrent rotary dryer at a temperature of 295 K and is withdrawn at 305 K. containing 5 per cent moisture. The air supplied which contains 0 006 kg water vapor/kg dry air, enters at 385 K and leaves at 310 K. The dryer handles 0.125 kg/s wet stock. Assuming that radiation losses amount to 20 kJ/kg dry air used, the latent heat of water vapor at 295 K = 2449 kJ/kg, specific heat capacity of dried material =088 kJ/kg K, the specific heat capacity of dry air 1.00 kJ/kg K, and the specific heat capacity of water vapor 2.01 kJ/kg K Determine the mass flowrate of dry air supplied to the dryer and the humidity of the exit air leaving it.

3) A granular material containing 40 per cent moisture is fed to a countercurrent rotary dryer at a temperature of 295 K and is withdrawn at 305 K. containing 5 per cent moisture. The air supplied which contains 0 006 kg water vapor/kg dry air, enters at 385 K and leaves at 310 K. The dryer handles 0.125 kg/s wet stock. Assuming that radiation losses amount to 20 kJ/kg dry air used, the latent heat of water vapor at 295 K = 2449 kJ/kg, specific heat capacity of dried material =088 kJ/kg K, the specific heat capacity of dry air 1.00 kJ/kg K, and the specific heat capacity of water vapor 2.01 kJ/kg K Determine the mass flowrate of dry air supplied to the dryer and the humidity of the exit air leaving it.

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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3) A granular material containing 40 per cent moisture is fed to a countercurrent rotary dryer at a temperature of 295 K and is withdrawn at 305 K. containing 5 per cent moisture. The air supplied which contains 0 006 kg water vapor/kg dry air, enters at 385 K and leaves at 310 K. The dryer handles 0.125 kg/s wet stock. Assuming that radiation losses amount to 20 kJ/kg dry air used, the latent heat of water vapor at 295 K = 2449 kJ/kg, specific heat capacity of dried material =088 kJ/kg K, the specific heat capacity of dry air 1.00 kJ/kg K, and the specific heat capacity of water vapor 2.01 kJ/kg K Determine the mass flowrate of dry air supplied to the dryer and the humidity of the exit air leaving it.
Transcribed Image Text:3) A granular material containing 40 per cent moisture is fed to a countercurrent rotary dryer at a temperature of 295 K and is withdrawn at 305 K. containing 5 per cent moisture. The air supplied which contains 0 006 kg water vapor/kg dry air, enters at 385 K and leaves at 310 K. The dryer handles 0.125 kg/s wet stock. Assuming that radiation losses amount to 20 kJ/kg dry air used, the latent heat of water vapor at 295 K = 2449 kJ/kg, specific heat capacity of dried material =088 kJ/kg K, the specific heat capacity of dry air 1.00 kJ/kg K, and the specific heat capacity of water vapor 2.01 kJ/kg K Determine the mass flowrate of dry air supplied to the dryer and the humidity of the exit air leaving it.
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