A metal steam pipe having an outside diameter of 30 mm has a surface temperature of 400 K and is to be insulated with an insulation having a thickness of 20 mm and a k of 0.08 W/m- K. The pipe is exposed to air at 300 K and a convection cbefficient of 30 W/m2 • K. (a) Calculate the critical radius and the heat loss per m of length for the bare pipe. (b) Calculate the heat loss for the insulated pipe assuming that the surface temperature of the pipe remains constant.
A metal steam pipe having an outside diameter of 30 mm has a surface temperature of 400 K and is to be insulated with an insulation having a thickness of 20 mm and a k of 0.08 W/m- K. The pipe is exposed to air at 300 K and a convection cbefficient of 30 W/m2 • K. (a) Calculate the critical radius and the heat loss per m of length for the bare pipe. (b) Calculate the heat loss for the insulated pipe assuming that the surface temperature of the pipe remains constant.
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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Transcribed Image Text:A metal steam pipe having an outside diameter of 30 mm has a surface temperature of 400 K and
is to be insulated with an insulation having a thickness of 20 mm and a k of 0.08 W/m- K. The
pipe is exposed to air at 300 K and a convection cpefficient of 30 W/m2 • K.
(a) Calculate the critical radius and the heat loss per m of length for the bare pipe.
(b) Calculate the heat loss for the insulated pipe assuming that the surface temperature of the pipe
remains constant.
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