Answered: A certain surface maintained at 1400 K…

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A certain surface maintained at 1400 K has the following spectral emissive characteristics: =0.08 for 0

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.22P

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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 certain surface maintained at 1400 K has
the following spectral emissive
characteristics: =0.08 for 0<\<0.6 µm,
=0.4 for 0.6<A<5 um, ɛ =0.7 for 5 <A<oo.
Calculate the emissive power of the
surface.
Select one:
a. 106 W/m2
b. 103 W/m2
O c. 105W/m2
O d. 104 W/m2

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