1.) Consider a sealed 20-cm-high electronic box whose base dimensions are 40 cm x40 cm placed in a vacuum chamber. The emissivity of the outer surface of the box is 0.95. If the electronic components in the box dissipate a total of 100 W of power and the outer surface temperature of the box is not to exceed 55 °C, - 40 cm 40 cm 100 W ɛ = 0.95 T = 60°C Electronic box determine the temperature at which the surrounding surfaces must be kept if this box is to be cooled by 20 cm radiation alone. Assume the heat transfer from the bottom surface of Stand the box to the stand to be negligible.
1.) Consider a sealed 20-cm-high electronic box whose base dimensions are 40 cm x40 cm placed in a vacuum chamber. The emissivity of the outer surface of the box is 0.95. If the electronic components in the box dissipate a total of 100 W of power and the outer surface temperature of the box is not to exceed 55 °C, - 40 cm 40 cm 100 W ɛ = 0.95 T = 60°C Electronic box determine the temperature at which the surrounding surfaces must be kept if this box is to be cooled by 20 cm radiation alone. Assume the heat transfer from the bottom surface of Stand the box to the stand to be negligible.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:I. Radiation and Simultaneous Heat Transfer Mechanism:
1.) Consider a sealed 20-cm-high electronic box whose base dimensions
are 40 cm x40 cm placed in a vacuum chamber. The emissivity of the
outer surface of the box is 0.95. If the
electronic components in the box
dissipate a total of 100 W of power
and the outer surface temperature of
the box is not to exceed 55 °C,
determine the temperature at which
the surrounding surfaces must be
kept if this box is to be cooled by
40 cm
40 cm
100 W
E = 0.95
T = 60°C
Electronic
box
20 cm
radiation alone. Assume the heat
transfer from the bottom surface of
Stand
the box to the stand to be negligible.
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