A batch drier removes water from a solid material at a rate of 30 lb/hr during the constant rate period. Under the operating conditions, the critical free moisture content is 0.5 lb H2O/lb dry solid, and the equilibrium moisture content is 0.04 lb water/ lb dry solid. The curve of drying rate versus moisture content may be assumed as a straight line during the entire falling rate period. Three hundred pounds of dry solid, containing 200 lb of water, enters the drier. How long will the total drying require if the final product contains 0.08 lb of water per lb of dry solid. A. 12.6 hr B. 1.27 hr C. 13.9 hr D. 19.3 hr
A batch drier removes water from a solid material at a rate of 30 lb/hr during the constant rate period. Under the operating conditions, the critical free moisture content is 0.5 lb H2O/lb dry solid, and the equilibrium moisture content is 0.04 lb water/ lb dry solid. The curve of drying rate versus moisture content may be assumed as a straight line during the entire falling rate period. Three hundred pounds of dry solid, containing 200 lb of water, enters the drier. How long will the total drying require if the final product contains 0.08 lb of water per lb of dry solid. A. 12.6 hr B. 1.27 hr C. 13.9 hr D. 19.3 hr
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A batch drier removes water from a solid material at a rate of 30 lb/hr during the constant rate period. Under the operating conditions, the critical free moisture content is 0.5 lb H2O/lb dry solid, and the equilibrium moisture content is 0.04 lb water/ lb dry solid. The curve of drying rate versus moisture
content may be assumed as a straight line during the entire falling rate period. Three hundred pounds of dry solid, containing 200 lb of water, enters the drier. How long will the total drying require if the final product contains 0.08 lb of water per lb of dry solid.
A. 12.6 hr B. 1.27 hr C. 13.9 hr D. 19.3 hr
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