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23 For a university building, steam at 150°C for heating is supplied from a house through a 35m length of insulated pipe over the road at first floor level. The pipe has an inside diameter of 0.15m with a wall thickness of 10mm and conductivity of 48 W/(m.K). The insulation is 50 mm thick with a conductivity of 0.87 W/(m.K). (a) State Fourier's law of conduction for an infinitely long cylinder and define the terminology used. (b) Calculate the heat loss when the atmospheric temperature is -5°C and the heat transfer coefficients between the steam and pipe and from the insulation to the atmosphere are 2.84 and 34.1 kW/(m².K) respectively

23 For a university building, steam at 150°C for heating is supplied from a house through a 35m length of insulated pipe over the road at first floor level. The pipe has an inside diameter of 0.15m with a wall thickness of 10mm and conductivity of 48 W/(m.K). The insulation is 50 mm thick with a conductivity of 0.87 W/(m.K). (a) State Fourier's law of conduction for an infinitely long cylinder and define the terminology used. (b) Calculate the heat loss when the atmospheric temperature is -5°C and the heat transfer coefficients between the steam and pipe and from the insulation to the atmosphere are 2.84 and 34.1 kW/(m².K) respectively

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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Q3 For a university building, steam at 150°C for heating is supplied from a remote boiler house through a 35m length of insulated pipe over the road at first floor level. The pipe has an inside diameter of 0.15m with a wall thickness of 10mm and conductivity of 48 W/(m.K). The insulation is 50 mm thick with a conductivity of 0.87 W/(m.K). (a) State Fourier's law of conduction for an infinitely long cylinder and define the terminology used. (b) Calculate the heat loss when the atmospheric temperature is -5°C and the heat transfer coefficients between the steam and pipe and from the insulation to the atmosphere are 2.84 and 34.1 kW/(m2.K) respectively
Transcribed Image Text:Q3 For a university building, steam at 150°C for heating is supplied from a remote boiler house through a 35m length of insulated pipe over the road at first floor level. The pipe has an inside diameter of 0.15m with a wall thickness of 10mm and conductivity of 48 W/(m.K). The insulation is 50 mm thick with a conductivity of 0.87 W/(m.K). (a) State Fourier's law of conduction for an infinitely long cylinder and define the terminology used. (b) Calculate the heat loss when the atmospheric temperature is -5°C and the heat transfer coefficients between the steam and pipe and from the insulation to the atmosphere are 2.84 and 34.1 kW/(m2.K) respectively
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