Consider a circular grill whose diameter is 0.30 m. The bottom grill is covered with hot coal bricks at 1 100 K, while the wire mesh on top of the grill is covered with steaks initially at 5 °C. The distance between the coal bricks and the steaks is 0.20 m. Treating both the steaks and the coal bricks as blackbodies, determine the initial rate of radiation heat transfer from the coal bricks to the steaks. Also, determine the initial rate of radiation heat transfer to the steaks if the side opening of the grill is covered by aluminum foil, which can be approximated as a reradiating surface.

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 11.66P
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9. Consider a circular grill whose diameter is 0.30 m. The bottom grill is covered with hot
coal bricks at 1 100 K, while the wire mesh on top of the grill is covered with steaks
initially at 5 °C. The distance between the coal bricks and the steaks is 0.20 m. Treating
both the steaks and the coal bricks as blackbodies, determine the initial rate of radiation
heat transfer from the coal bricks to the steaks. Also, determine the initial rate of
radiation heat transfer to the steaks if the side opening of the grill is covered by
aluminum foil, which can be approximated as a reradiating surface.
Transcribed Image Text:9. Consider a circular grill whose diameter is 0.30 m. The bottom grill is covered with hot coal bricks at 1 100 K, while the wire mesh on top of the grill is covered with steaks initially at 5 °C. The distance between the coal bricks and the steaks is 0.20 m. Treating both the steaks and the coal bricks as blackbodies, determine the initial rate of radiation heat transfer from the coal bricks to the steaks. Also, determine the initial rate of radiation heat transfer to the steaks if the side opening of the grill is covered by aluminum foil, which can be approximated as a reradiating surface.
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