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A large billet of steel initially at 260°C is placed in a radiant furnace where the surface temperature is held at 1200°C. Assuming the billet is infinite in extent, compute the temperature at point P shown in the accompanying sketch after 25 min has elapsed. The average properties of steel are: k = 28 W/(m K), I? = 7360 kg/m3, and c = 500 J/(kg K).
GIVEN
A large billet of steel is placed in a radiant furnaceInitial temperature (To) = 260°CSurface temperature of billet in the oven (Ts) = 1200°CLapse time (t) = 25 min = 1500 sThermal conductivity (k) = 28 W/(m K)Density (I?) = 7360 kg/m3Specific heat (c) = 500 J/(kg K)
ASSUMPTIONS
The billet infinite in extent
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