A thick-walled tube of stainless steel(Ks=19.0 W/m.°C) with 2-cm inner diameter (ID) and 4-cm outer diameter (OD) is covered with a 3-cm layer of asbestos insulation (ka =0.2 W/m.°C). If the temperatures of inside wall of the pipe and the outside of the insulator are maintained at 600 and the surface temperature on the insulating material remained constant at 293 °C. determine the values of r1,r2,and r3 from the below equation and calculate heat loss per unit lenght . q/L=ln(r2/r1)/Ks+ln(r3/r2)/Ka2π(T1−T2)
A thick-walled tube of stainless steel(Ks=19.0 W/m.°C) with 2-cm inner diameter (ID) and 4-cm outer diameter (OD) is covered with a 3-cm layer of asbestos insulation (ka =0.2 W/m.°C). If the temperatures of inside wall of the pipe and the outside of the insulator are maintained at 600 and the surface temperature on the insulating material remained constant at 293 °C. determine the values of r1,r2,and r3 from the below equation and calculate heat loss per unit lenght . q/L=ln(r2/r1)/Ks+ln(r3/r2)/Ka2π(T1−T2)
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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A thick-walled tube of stainless steel(Ks=19.0 W/m.°C) with 2-cm inner diameter (ID) and 4-cm outer diameter (OD) is covered with a 3-cm layer of asbestos insulation (ka =0.2 W/m.°C). If the temperatures of inside wall of the pipe and the outside of the insulator are maintained at 600 and the surface temperature on the insulating material remained constant at 293 °C.
determine the values of r1,r2,and r3 from the below equation and calculate heat loss per unit lenght .
q/L=ln(r2/r1)/Ks+ln(r3/r2)/Ka2π(T1−T2)
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