A circular ceramic plate that can be modelled as a blackbody is being heated by an electrical heater. The plate is 30cm in diameter and is situated in a surrounding ambient temperature of 15°C where the natural convection heat transfer coefficient is 12W/m²-K. The efficiency of the electrical heater to transfer heat to the plate is 80%, the electric power is required such that the heater needs to keep the surface temperature of the plate at 200°C. Ambient 15°C h=12 W/m²K Tur=15°C Ceramic plate T₁=200°C Welec (A) Determine the heat emitted from the plate, as a blackbody. (B) Determine the radiation incident on the plate from the surroundings.

A circular ceramic plate that can be modelled as a blackbody is being heated by an electrical heater. The plate is 30cm in diameter and is situated in a surrounding ambient temperature of 15°C where the natural convection heat transfer coefficient is 12W/m²-K. The efficiency of the electrical heater to transfer heat to the plate is 80%, the electric power is required such that the heater needs to keep the surface temperature of the plate at 200°C. Ambient 15°C h=12 W/m²K Tur=15°C Ceramic plate T₁=200°C Welec (A) Determine the heat emitted from the plate, as a blackbody. (B) Determine the radiation incident on the plate from the surroundings.

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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