In a production facility, 3 cm thick large brass plates (k 110 W m middot K, Iuml 8530 kg m 3 , c p 380 J kg middot K, and Icirc plusmn 33 9 Atilde 10 6 m 2 s) that are initially at a uniform temperature of 25 deg C are heated by passing them through an oven maintained at 700 deg C The plates remai...

Large brass plates are heated in an oven The surface temperature of the plates leaving the oven is t ...

In a production facility, 3-cm-thick large brass plates (k = 110 W/m·K, Ï = 8530 kg/m 3

Question:

In a production facility, 3-cm-thick large brass plates (k = 110 W/m·K, Ï = 8530 kg/m³, c_p= 380 J/kg·K, and Î± = 33.9 Ã— 10^-6m²/s) that are initially at a uniform temperature of 25°C are heated by passing them through an oven maintained at 700°C. The plates remain in the oven for a period of 10 min. Taking the convection heat transfer coefficient to be h = 80 W/m²·K, determine the surface temperature of the plates when they come out of the oven. Solve this problem using analytical one-term approximation method (not the Heisler charts). Can this problem be solved using lumped system analysis? Justify your answer.

Furnace, 700°C 3 cm Brass plate 25°C