Two symmetrically placed parallel rectangular surtace of 4 m x 3 m size 10 points kept at 2 m distance are at 1000 K and 600 K. The emissivities are 0.6 and 0.5. The sides are exposed to black surroundings at 300 K. Determine the heat flow from the surfaces.

Two symmetrically placed parallel rectangular surtace of 4 m x 3 m size 10 points kept at 2 m distance are at 1000 K and 600 K. The emissivities are 0.6 and 0.5. The sides are exposed to black surroundings at 300 K. Determine the heat flow from the surfaces.

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 11.6P

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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

10 points
Two symmetrically placed parallel rectangular surtace of 4 m x 3 m size
kept at 2 m distance are at 1000 K and 600 K. The emissivities are 0.6 and
0.5. The sides are exposed to black surroundings at 300 K. Determine the
heat flow from the surfaces.

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