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A 5 cm diameter steel pipe is covered with a 1 cm layer of insulating materials having k = 0.22 W/m.°C followed by a 3 cm thick layer of another insulating material having k = 0.06 W/m°C. The entire assembly is exposed to a convection surrounding condition of h = 60 W/m?.°C and Tw = 15 °C. The outside surface temperature of the steel pipe is 400 °C. Calculate the heat lost by the pipe-insulation assembly for a pipe length of 20 m.

A 5 cm diameter steel pipe is covered with a 1 cm layer of insulating materials having k = 0.22 W/m.°C followed by a 3 cm thick layer of another insulating material having k = 0.06 W/m°C. The entire assembly is exposed to a convection surrounding condition of h = 60 W/m?.°C and Tw = 15 °C. The outside surface temperature of the steel pipe is 400 °C. Calculate the heat lost by the pipe-insulation assembly for a pipe length of 20 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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A 5 cm diameter steel pipe is covered with a 1 cm layer of insulating materials having k = 0.22 W/m.°C followed by a 3 cm thick layer of another insulating material having k = 0.06 W/m°C. The entire assembly is exposed to a convection surrounding condition of h = 60 W/m?.°C and Tw = 15 °C. The outside surface temperature of the steel pipe is 400 °C. Calculate the heat lost by the pipe-insulation assembly for a pipe length of 20 m.
Transcribed Image Text:A 5 cm diameter steel pipe is covered with a 1 cm layer of insulating materials having k = 0.22 W/m.°C followed by a 3 cm thick layer of another insulating material having k = 0.06 W/m°C. The entire assembly is exposed to a convection surrounding condition of h = 60 W/m?.°C and Tw = 15 °C. The outside surface temperature of the steel pipe is 400 °C. Calculate the heat lost by the pipe-insulation assembly for a pipe length of 20 m.
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