Example 04Consider a 20-cm-diameter spherical ball at 800 Ksuspended in air as shown in the figure. Assuming the ballclosely approximates a blackbody, determine(a) the total blackbody emissive power,800 K(b) the total amount of radiation emitted by the ball in 5 min,(c) If the ball is actually having an average emissivity of0.521, calculate the radiation heat transfer rate emitting20 cmBallfrom the ball.

Solution:- Given data: D=20cm T=800K take σ=5.67×10-8w/mLK4 A=4πR2…

Consider a 20-cm-diameter spherical ball at 800 K suspended in air as shown in the figure. Assuming the ball closely approximates a blackbody, determine (a) the total blackbody emissive power, (b) the total amount of radiation emitted by the ball in 5 min, (c) If the ball is actually having an average emissivity of 0.521, calculate the radiation heat transfer rate emitting from tho boll

Consider a 20-cm-diameter spherical ball at 800 K suspended in air as shown in the figure. Assuming the ball closely approximates a blackbody, determine (a) the total blackbody emissive power, (b) the total amount of radiation emitted by the ball in 5 min, (c) If the ball is actually having an average emissivity of 0.521, calculate the radiation heat transfer rate emitting from tho boll

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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