The 50.8 mm thick Douglas fir wood board containing 30% moisture by weight is dried on both sides. (Edges and corners are neglected.) The drying air flows over the wood and the equilibrium humidity on the tree surface is kept at 5% by weight. (kc=∞ and K=1) Spreadability (diffusivity) in drying can be taken as 3.72 x 10-6 m2/s. Calculate the time required for the moisture in the center to reach 10% by weight.
The 50.8 mm thick Douglas fir wood board containing 30% moisture by weight is dried on both sides. (Edges and corners are neglected.) The drying air flows over the wood and the equilibrium humidity on the tree surface is kept at 5% by weight. (kc=∞ and K=1) Spreadability (diffusivity) in drying can be taken as 3.72 x 10-6 m2/s. Calculate the time required for the moisture in the center to reach 10% by weight.
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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The 50.8 mm thick Douglas fir wood board containing 30% moisture by weight is dried on both sides. (Edges and corners are neglected.) The drying air flows over the wood and the equilibrium humidity on the tree surface is kept at 5% by weight. (kc=∞ and K=1) Spreadability (diffusivity) in drying can be taken as 3.72 x 10-6 m2/s. Calculate the time required for the moisture in the center to reach 10% by weight.
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