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The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe with an inner diameter of 9.0 cm and an outer diameter of 9.8 cm. The pipe is first covered externally with insulation material with a thermal conductivity coefficient of k-0.0623 W/m.K in 4 cm thickness and then with another material with a thermal conductivity coefficient of k-0.047 W/m.K in 3 cm thickness. The individual convective heat transfer coefficient on the gas side inside the pipe is 67 W/m2.K, and the individual convective heat transfer coefficient on the atmospheric air side outside the pipe covered with insulation material is 43 W/m2.K. Since the temperature of the atmospheric air where the pipe is located is 25 oC; a) Calculate the heat transferred per unit pipe length, b) the interface temperatures between the layers. Gas

The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe with an inner diameter of 9.0 cm and an outer diameter of 9.8 cm. The pipe is first covered externally with insulation material with a thermal conductivity coefficient of k-0.0623 W/m.K in 4 cm thickness and then with another material with a thermal conductivity coefficient of k-0.047 W/m.K in 3 cm thickness. The individual convective heat transfer coefficient on the gas side inside the pipe is 67 W/m2.K, and the individual convective heat transfer coefficient on the atmospheric air side outside the pipe covered with insulation material is 43 W/m2.K. Since the temperature of the atmospheric air where the pipe is located is 25 oC; a) Calculate the heat transferred per unit pipe length, b) the interface temperatures between the layers. Gas

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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2:03 The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe with an inner diameter of 9.0 cm and an outer diameter of 9.8 cm. The pipe is first covered externally with insulation material with a thermal conductivity coefficient of k-0.0623 W/m.K in 4 cm thickness and then with another material with a thermal conductivity coefficient of k=0.047 W/m.K in 3 cm thickness. The individual convective heat transfer coefficient on the gas side inside the pipe is 67 W/m2.K, and the individual convective heat transfer coefficient on the atmospheric air side outside the pipe covered with insulation material is 43 W/m2.K. Since the temperature of the atmospheric air where the pipe is located is 25 oC; a) Calculate the heat transferred per unit pipe length, b) the interface temperatures between the layers. ● ⒸX Gas
Transcribed Image Text:2:03 The gas at an average temperature of 180 oC is transported through a steel (steel-46 W/m2.K) pipe with an inner diameter of 9.0 cm and an outer diameter of 9.8 cm. The pipe is first covered externally with insulation material with a thermal conductivity coefficient of k-0.0623 W/m.K in 4 cm thickness and then with another material with a thermal conductivity coefficient of k=0.047 W/m.K in 3 cm thickness. The individual convective heat transfer coefficient on the gas side inside the pipe is 67 W/m2.K, and the individual convective heat transfer coefficient on the atmospheric air side outside the pipe covered with insulation material is 43 W/m2.K. Since the temperature of the atmospheric air where the pipe is located is 25 oC; a) Calculate the heat transferred per unit pipe length, b) the interface temperatures between the layers. ● ⒸX Gas
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