11.19 A long rod, with a diameter of 3 mm, is placed in a vacuum parallel to a large and flat heated surface. The other side of the rod is exposed to vacuum chamber walls at 300 K. Assume that the heated surface and the surface of the rod are both gray with equal emissivities of 0.7. The rod has a volumetric heat capacity of pc, = 6.7 × 106J m³ K¨¹. Calculate the heating rate of the rod at 335 K, 500 K, 700 K, and 800 K. Rod Heated surface at 830 K
11.19 A long rod, with a diameter of 3 mm, is placed in a vacuum parallel to a large and flat heated surface. The other side of the rod is exposed to vacuum chamber walls at 300 K. Assume that the heated surface and the surface of the rod are both gray with equal emissivities of 0.7. The rod has a volumetric heat capacity of pc, = 6.7 × 106J m³ K¨¹. Calculate the heating rate of the rod at 335 K, 500 K, 700 K, and 800 K. Rod Heated surface at 830 K
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 11.3P: Determine the total average hemispherical emissivity and the emissive power of a surface that has a...
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Transcribed Image Text:11.19 A long rod, with a diameter of
3 mm, is placed in a vacuum parallel
to a large and flat heated surface. The
other side of the rod is exposed to
vacuum chamber walls at 300 K.
Assume that the heated surface and the
surface of the rod are both gray with
equal emissivities of 0.7. The rod has
a volumetric heat capacity of
pc, = 6.7 × 106J m³ K¨¹. Calculate
the heating rate of the rod at 335 K,
500 K, 700 K, and 800 K.
Rod
Heated surface
at 830 K
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