5.52 Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle. Consider a 100-mm-thick plate (k = 45 W/m.K, p = 7800 kg/m³, c, = 500 J/kg .K) that is initially at a uniform tempera- ture of 300°C and is heated (on both sides) in a gas-fired furnace for which T = 700°C and h = 500 W/m² K. How long will it take for a minimum temperature of 550°C to be reached in the plate?

5.52 Steel is sequentially heated and cooled (annealed) to relieve stresses and to make it less brittle. Consider a 100-mm-thick plate (k = 45 W/m.K, p = 7800 kg/m³, c, = 500 J/kg .K) that is initially at a uniform tempera- ture of 300°C and is heated (on both sides) in a gas-fired furnace for which T = 700°C and h = 500 W/m² K. How long will it take for a minimum temperature of 550°C to be reached in the plate?

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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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

100%

5.52 Steel is sequentially heated and cooled (annealed) to
relieve stresses and to make it less brittle. Consider a
100-mm-thick plate (k = 45 W/m.K, p = 7800 kg/m³,
Cp
c, = 500 J/kg .K) that is initially at a uniform tempera-
ture of 300°C and is heated (on both sides) in a
gas-fired furnace for which T = 700°C and h =
500 W/m² K. How long will it take for a minimum
temperature of 550°C to be reached in the plate?

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