mrsjenrucker
18.05.2021 •
Physics
Consider a 30-cm-diameter hemispherical enclosure. The dome is maintained at 600 K, and heat is supplied from the dome at a rate of 65 W while the base surface with an emissivity of 0.55 is maintained at 400 K. Determine the emissivity of the dome.
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Ответ:
Explanation:
Diameter
Temperature
Rate of supply
Emissivity of base surface
Temperature at base
Generally the equation for Area of base surface is mathematically given by
Generally the equation for Area of Hemispherical dome is mathematically given by
Since base is a flat surface
Therefore
Generally the equation for Net rate of radiation heat transfer between two surfaces is mathematically given by
Where
Therefore
Therefore the emissivity of the dome is
Ответ: