Long, cylindrical bars are heat-treated in an infrared oven. The bars, of diameter D = 50 mm,

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Long, cylindrical bars are heat-treated in an infrared oven. The bars, of diameter D = 50 mm, are placed on an insulated tray and are heated with an overhead infrared panel maintained at temperature Tp = 800 K with εp = 0.85. The bars are at Tb = 300 K and have an emissivity of εb = 0.92.

(a) For a product spacing of s = 100 mm and a product length of L = 1 m, determine the radiation heat flux delivered to the product. Determine the heat flux at the surface of the panel heater.

(b) Plot the radiation heat flux experienced by the product and the panel heater radiation heat flux over the range 50 mm ≤ s ≤ 250 mm.

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Fundamentals Of Heat And Mass Transfer

ISBN: 9780470501979

7th Edition

Authors: Theodore L. Bergman, Adrienne S. Lavine, Frank P. Incropera, David P. DeWitt

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