Question

Q. 3. Determine the time t required to heat a steel plate of thickness 28 = 24 mm from the initial temperature to 25°C to the final temperature the 450°C by placing the plate into a furnace in which the temperature ty= 600°C is maintained. The thermal conductivity, heat capacity and the density of steel are respectively 2 = 45.4 W/m-°C, c = 0.502 kJ/kg-°C and p = 7800 kg/m”; the local coefficient of heat transfer from the hot surroundings from the hot surroundings in the furnace to the surface of the steel plate a = 23.3 W/m?-°C.​

Answer 1

Answer:

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