A circular ceramic plate that can be modeled as a blackbody is being heated by an electrical heater. The plate is 30 cm in diameter and is situated in a surrounding ambient temperature of 15°C where the natural convection heat transfer coefficient is 12 W/m2?K. If the efficiency of the electrical heater to transfer heat to the plate is 80%, determine the electric power that the heater needs to keep the surface temperature of the plate at 200°C.
A circular ceramic plate that can be modeled as a blackbody is being heated by an electrical heater. The plate is 30 cm in diameter and is situated in a surrounding ambient temperature of 15°C where the natural convection heat transfer coefficient is 12 W/m2?K. If the efficiency of the electrical heater to transfer heat to the plate is 80%, determine the electric power that the heater needs to keep the surface temperature of the plate at 200°C.
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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A circular ceramic plate that can be modeled as a
blackbody is being heated by an electrical heater. The plate
is 30 cm in diameter and is situated in a surrounding ambient
temperature of 15°C where the natural convection heat
transfer coefficient is 12 W/m2?K. If the efficiency of the
electrical heater to transfer heat to the plate is 80%, determine
the electric power that the heater needs to keep the surface
temperature of the plate at 200°C.
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