3.2-4. Convection, Conduction, and Overall U. 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 U, based on the outside area A。.
3.2-4. Convection, Conduction, and Overall U. 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 U, based on the outside area A。.
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:13.2-4. Convection, Conduction, and Overall U. 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 U, based on the outside area A.
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