In an annealing process, a 50-mm-thick stainless steel plate (Ï = 8238 kg/m 3 , c p

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In an annealing process, a 50-mm-thick stainless steel plate (ρ = 8238 kg/m3, cp= 468 J/kg·K, k = 13.4 W/m·K, and α = 3.48 × 10€“6m2/s) was reheated in a furnace from an initial uniform temperature of 230°C. The ambient temperature inside the furnace is at a uniform temperature of 1000°C and has a convection heat transfer coefficient of 215 W/m2·K. If the entire stainless steel plate is to be heated to at least 600°C, determine the time that the plate should be heated in the furnace using

(a) Table 18€“2

TABLE 18-2 Coefficients used in the one-term approximate solution of transient one- dimensional heat conduction in plane

(b) the Heisler chart (Figure 18€“14).

Cylinder 1.0 0.7 0.5 0.4 hro 0.3 0.2 16 80 70 0.1 0.07 0.05 0.04 0.03 0.02 0.01 0.007 0.005 0.004 0.003 0.002 250 350 10

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Related Book For  answer-question

Fundamentals of Thermal-Fluid Sciences

ISBN: 978-0078027680

5th edition

Authors: Yunus A. Cengel, Robert H. Turner, John M. Cimbala

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