A dryer is shaped like a long semicylindrical duct of diameter 2 m. The base of the dryer is occupied with watersoaked materials that are to be dried. The dome of the dryer has a constant temperature of 500°C, while the materials at the base are at 40°C. Both surfaces can be approximated as blackbody. Determine the length of the dryer so that the materials are dried at a rate of 0.1 kg/s.

A dryer is shaped like a long semicylindrical duct of diameter 2 m. The base of the dryer is occupied with watersoaked materials that are to be dried. The dome of the dryer has a constant temperature of 500°C, while the materials at the base are at 40°C. Both surfaces can be approximated as blackbody. Determine the length of the dryer so that the materials are dried at a rate of 0.1 kg/s.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.31P: 11.31 A large slab of steel 0.1 m thick contains a 0.1 -m-di- ameter circular hole whose axis is...

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Concept explainers

Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

Question

A dryer is shaped like a long semicylindrical duct of
diameter 2 m. The base of the dryer is occupied with watersoaked
materials that are to be dried. The dome of the dryer
has a constant temperature of 500°C, while the materials at
the base are at 40°C. Both surfaces can be approximated
as blackbody. Determine the length of the dryer so that the
materials are dried at a rate of 0.1 kg/s.

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