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Ex:Calculate the critical radius of insulation for asbestos with k = 0.17 W/(m.K) surrounding a pipe and exposed to room air at 20°C with h=3 W/(m2 .K). Calculate the heat loss from a 5 cm diameter pipe with a outer surface temperature of 100°C when covered with the critical radius of insulation and without insulation. (Ans: r,c=5.67 cm; Qwith insulation = 47 W/m; Qwithout insulation = 37.7 W/m)

Ex:Calculate the critical radius of insulation for asbestos with k = 0.17 W/(m.K) surrounding a pipe and exposed to room air at 20°C with h=3 W/(m2 .K). Calculate the heat loss from a 5 cm diameter pipe with a outer surface temperature of 100°C when covered with the critical radius of insulation and without insulation. (Ans: r,c=5.67 cm; Qwith insulation = 47 W/m; Qwithout insulation = 37.7 W/m)

Introduction to Chemical Engineering Thermodynamics
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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Ex:Calculate the critical radius of insulation for asbestos with k = 0.17 W/(m.K) surrounding a pipe and exposed to room air at 20°C with h=3 W/(m2 .K). Calculate the heat loss from a 5 cm diameter pipe with a outer surface temperature of 100°C when covered with the critical radius of insulation and without insulation. (Ans: roc=5.67 cm; Qwith insulation = 47 W/m; Qwithout insulation = 37.7 W/m)
Transcribed Image Text:Ex:Calculate the critical radius of insulation for asbestos with k = 0.17 W/(m.K) surrounding a pipe and exposed to room air at 20°C with h=3 W/(m2 .K). Calculate the heat loss from a 5 cm diameter pipe with a outer surface temperature of 100°C when covered with the critical radius of insulation and without insulation. (Ans: roc=5.67 cm; Qwith insulation = 47 W/m; Qwithout insulation = 37.7 W/m)
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