16 mm in diameter mild steel sphere initially at 6000 C is exposed to a current of air at 300 C with a convection coefficient of 90 W/m2 .K. Calculate the time required to cool the sphere to 1000 C, Initial rate of cooling in 0C/s, Instantaneous heat transfer rate at the end of one minute after the start of cooling, and total energy transferred during the first one minute. Take properties of mild steel as k = 43 W/m.K, C = 474 J/kg.K, ρ = 7850 kg/m3 , α = 0.045 m2 /s
16 mm in diameter mild steel sphere initially at 6000 C is exposed to a current of air at 300 C with a convection coefficient of 90 W/m2 .K. Calculate the time required to cool the sphere to 1000 C, Initial rate of cooling in 0C/s, Instantaneous heat transfer rate at the end of one minute after the start of cooling, and total energy transferred during the first one minute. Take properties of mild steel as k = 43 W/m.K, C = 474 J/kg.K, ρ = 7850 kg/m3 , α = 0.045 m2 /s
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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16 mm in diameter mild steel sphere initially at 6000 C is exposed to a current of air at 300
C with a convection coefficient of 90 W/m2
.K. Calculate the time required to cool the
sphere to 1000 C, Initial rate of cooling in 0C/s, Instantaneous heat transfer rate at the end
of one minute after the start of cooling, and total energy transferred during the first one
minute. Take properties of mild steel as k = 43 W/m.K, C = 474 J/kg.K, ρ = 7850 kg/m3
,
α = 0.045 m2
/s
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