A gas at 450 K is flowing inside a 2-in. steel pipe, schedule 40. The pipe is insulated with 51 mm of lagging having a mean k = 0.0623 W/m - K. The convective heat-transfer coefficient of the gas inside the pipe is 30.7 W/m2• K and the convective coefficient on the outside of the lagging is 10.8. The air is at a temperature of 300 K. (a) Calculate the heat loss per unit length of 1 m of pipe using resistances. (b) Repeat using the overall Uo based on the outside area Ao.
A gas at 450 K is flowing inside a 2-in. steel pipe, schedule 40. The pipe is insulated with 51 mm of lagging having a mean k = 0.0623 W/m - K. The convective heat-transfer coefficient of the gas inside the pipe is 30.7 W/m2• K and the convective coefficient on the outside of the lagging is 10.8. The air is at a temperature of 300 K. (a) Calculate the heat loss per unit length of 1 m of pipe using resistances. (b) Repeat using the overall Uo based on the outside area Ao.
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 gas at 450 K is flowing inside a 2-in. steel pipe, schedule 40. The pipe is insulated with 51 mm
of lagging having a mean k = 0.0623 W/m - K. The convective heat-transfer coefficient of the gas
inside the pipe is 30.7 W/m²• K and the convective coefficient on the outside of the lagging is
10.8. The air is at a temperature of 300 K.
(a) Calculate the heat loss per unit length of 1 m of pipe using resistances.
(b) Repeat using the overall Uo based on the outside area Ao.
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