(3) A thick steel slab is initially at a uniform temperature of 25°C. When the slab is exposed to hot flue gases, the surface temperature suddenly changes to 450°C. Make calculations for the temperature in a plane 250 mm from the slab surface 5 hours after the operation of change in surface temperature. Find also the heat flowing into 2 square meters of this plane and the total energy flowing through the surface during the 5 hour period. It may be presumed that for steel, thermal conductivity k = 160 kJ/m hr deg, density p = 8000 kg/m³ and the specific heat capacity Cp = 0.48 kJ/kg deg.
(3) A thick steel slab is initially at a uniform temperature of 25°C. When the slab is exposed to hot flue gases, the surface temperature suddenly changes to 450°C. Make calculations for the temperature in a plane 250 mm from the slab surface 5 hours after the operation of change in surface temperature. Find also the heat flowing into 2 square meters of this plane and the total energy flowing through the surface during the 5 hour period. It may be presumed that for steel, thermal conductivity k = 160 kJ/m hr deg, density p = 8000 kg/m³ and the specific heat capacity Cp = 0.48 kJ/kg deg.
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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Transcribed Image Text:(3) A thick steel slab is initially at a uniform temperature of 25°C. When the slab is
exposed to hot flue gases, the surface temperature suddenly changes to 450°C. Make
calculations for the temperature in a plane 250 mm from the slab surface 5 hours after
the operation of change in surface temperature. Find also the heat flowing into 2 square
meters of this plane and the total energy flowing through the surface during the 5 hour
period. It may be presumed that for steel, thermal conductivity k = 160 kJ/m hr deg,
density p = 8000 kg/m³ and the specific heat capacity Cp = 0.48 kJ/kg deg.
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