A dryer is shaped like a long semicylindrical duct of diameter 1.5 m. The base of the dryer is occupied with water soaked materials to be dried, and maintained at a temperature of 370 K and emissivity of 0.5. The dome of the dryer is maintained at 1000 K with emissivity of 0.8. Determine the drying rate per unit length experienced by the wet materials.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter11: Heat Transfer By Radiation
Section: Chapter Questions
Problem 11.67P
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A dryer is shaped like a long semicylindrical duct of
diameter 1.5 m. The base of the dryer is occupied with water
soaked materials to be dried, and maintained at a temperature
of 370 K and emissivity of 0.5. The dome of the dryer is
maintained at 1000 K with emissivity of 0.8. Determine the
drying rate per unit length experienced by the wet materials.

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