A pipe with an outside diameter of 6.03 cm and an inside diameter of 4.93 cm carries steam at 250 ° C. The pipe is covered with 2.5 cm of magnesia insulation (85%) followed by 2.5 cm of polystyrene insulation (k = 0.025 W / (m K)). The temperature of the outer surface of the polystyrene is 25 ° C. The thermal resistance of the pipe wall can be neglected in this problem. Also neglect convective and contact resistors. - Calculate the rate of heat loss per meter of pipe length. - Calculate the temperature at the interface between the two types of insulation.
A pipe with an outside diameter of 6.03 cm and an inside diameter of 4.93 cm carries steam at 250 ° C. The pipe is covered with 2.5 cm of magnesia insulation (85%) followed by 2.5 cm of polystyrene insulation (k = 0.025 W / (m K)). The temperature of the outer surface of the polystyrene is 25 ° C. The thermal resistance of the pipe wall can be neglected in this problem. Also neglect convective and contact resistors. - Calculate the rate of heat loss per meter of pipe length. - Calculate the temperature at the interface between the two types of insulation.
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 pipe with an outside diameter of 6.03 cm and an inside diameter of 4.93 cm carries steam at 250 ° C. The pipe is covered with 2.5 cm of magnesia insulation (85%) followed by 2.5 cm of polystyrene insulation (k = 0.025 W / (m K)). The temperature of the outer surface of the polystyrene is 25 ° C. The thermal resistance of the pipe wall can be neglected in this problem. Also neglect convective and contact resistors.
- Calculate the rate of heat loss per meter of pipe length.
- Calculate the temperature at the interface between the two types of insulation.
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