Homework Help is Here – Start Your Trial Now!
Engineering
Chemical Engineering
A tube 93 mm outer diameter is insulated with a layer of silica foam 38 mm thick of conductivity 0.053 W/m-K, followed by a 23 mm thick layer of cork of conductivity 0.035 W/m-K. If the temperature on the outer surface of the pipe is 159 °C and the temperature of the outer surface of the cork is 24 °C, calculate the heat loss per secon per metre of pipe across both layers.

A tube 93 mm outer diameter is insulated with a layer of silica foam 38 mm thick of conductivity 0.053 W/m-K, followed by a 23 mm thick layer of cork of conductivity 0.035 W/m-K. If the temperature on the outer surface of the pipe is 159 °C and the temperature of the outer surface of the cork is 24 °C, calculate the heat loss per secon per metre of pipe across both layers.

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
See similar textbooks
icon
Related questions
Question

I have included some formulas 

A tube 93 mm outer diameter is insulated with a layer of silica foam 38 mm thick of conductivity 0.053 W/m-K, followed by a 23 mm thick layer of cork of conductivity 0.035 W/m-K. If the temperature on the outer surface of the pipe is 159 °C and the temperature of the outer surface of the cork is 24 °C, calculate the heat loss per second per metre of pipe across both layers.
Transcribed Image Text:A tube 93 mm outer diameter is insulated with a layer of silica foam 38 mm thick of conductivity 0.053 W/m-K, followed by a 23 mm thick layer of cork of conductivity 0.035 W/m-K. If the temperature on the outer surface of the pipe is 159 °C and the temperature of the outer surface of the cork is 24 °C, calculate the heat loss per second per metre of pipe across both layers.
Cylindrical Conduction WITH Convection Cylindrical Conduction WITH Convection AND Fouling Factors Q= Q: Q Q 1 U₂ 2 d.h. = 1 h₂ Vi + + Do Dh₂ h₂ 1 + 2π Lt AT In(d, /d.) k 2π LtAT In(D./D;) k + D₂ D₂ Dhai Dh + 2πr. LAT D¡ln(D/D₂) 2k D. 1 Dihai + 2πr LAT D.In(D/D) 1 2k + ho + + + 2 d.h 1 h₂ro. + Di Doho 2πr, LAT D.In(D/D₂) 2k Q= 2 d.h 1 1 + + + ho nao. 2π Lt AT ln(d/d) In(d/d.) 2 k₁ k₂ dh If based on outside area, A.-2лr L. Same as equation above on left but for one second. To get above equation divide numerator and denominator by r.) If based on inside area, A-2πr;L Same as equation above on left but for one second. To get above equation divide numerator and denominator by r;) U₂₁ + +...+. + 1 Do Do x₂ Do Dha Dh k + 1 D. 1 (D₂/2){ln(D¸ /D;)} _ _1 + + + Di Jh; k ho hao 1 + no hio {Either formula to get U。}
Transcribed Image Text:Cylindrical Conduction WITH Convection Cylindrical Conduction WITH Convection AND Fouling Factors Q= Q: Q Q 1 U₂ 2 d.h. = 1 h₂ Vi + + Do Dh₂ h₂ 1 + 2π Lt AT In(d, /d.) k 2π LtAT In(D./D;) k + D₂ D₂ Dhai Dh + 2πr. LAT D¡ln(D/D₂) 2k D. 1 Dihai + 2πr LAT D.In(D/D) 1 2k + ho + + + 2 d.h 1 h₂ro. + Di Doho 2πr, LAT D.In(D/D₂) 2k Q= 2 d.h 1 1 + + + ho nao. 2π Lt AT ln(d/d) In(d/d.) 2 k₁ k₂ dh If based on outside area, A.-2лr L. Same as equation above on left but for one second. To get above equation divide numerator and denominator by r.) If based on inside area, A-2πr;L Same as equation above on left but for one second. To get above equation divide numerator and denominator by r;) U₂₁ + +...+. + 1 Do Do x₂ Do Dha Dh k + 1 D. 1 (D₂/2){ln(D¸ /D;)} _ _1 + + + Di Jh; k ho hao 1 + no hio {Either formula to get U。}
Expert Solution
steps

Step by step

Solved in 2 steps with 2 images

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami…
Introduction to Chemical Engineering Thermodynami…
Chemical Engineering
ISBN:
9781259696527
Author:
J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:
McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemical Engineering
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
Elements of Chemical Reaction Engineering (5th Ed…
Elements of Chemical Reaction Engineering (5th Ed…
Chemical Engineering
ISBN:
9780133887518
Author:
H. Scott Fogler
Publisher:
Prentice Hall
Process Dynamics and Control, 4e
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:
9781119285915
Author:
Seborg
Publisher:
WILEY
Industrial Plastics: Theory and Applications
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:
9781285061238
Author:
Lokensgard, Erik
Publisher:
Delmar Cengage Learning
Unit Operations of Chemical Engineering
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:
9780072848236
Author:
Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:
McGraw-Hill Companies, The
SEE MORE TEXTBOOKS