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A pipe (ID: 130 mm, OD: 165 mm, k=15 W/m²-K, Length: 2 meters)is insulated with several materials, and convection on the inside and outside of the pipe is as follows. Oil inside is at 118°C and air outside is at 25°C.

A pipe (ID: 130 mm, OD: 165 mm, k=15 W/m²-K, Length: 2 meters)is insulated with several materials, and convection on the inside and outside of the pipe is as follows. Oil inside is at 118°C and air outside is at 25°C.

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 pipe (ID: 130 mm, OD: 165 mm, k=15 W/m²-K, Length: 2 meters) is insulated with several materials, and convection on the inside and outside of the pipe is as follows. Oil inside is at 118°C and air outside is at 25°C. Material kĄ or h Thickness A 10.256 W/m2-K 25 mm В 2.369 W/m2-K 30 mm 0.257 WIm2-K 40 mm Oil inside h = 120.3T3 (T in K) 2 Air outside h = 0.27T3 (T in K) Determine heat losses of the pipe, and what must be the temperature of the oil to decrease the heat losses by 20%?
Transcribed Image Text:A pipe (ID: 130 mm, OD: 165 mm, k=15 W/m²-K, Length: 2 meters) is insulated with several materials, and convection on the inside and outside of the pipe is as follows. Oil inside is at 118°C and air outside is at 25°C. Material kĄ or h Thickness A 10.256 W/m2-K 25 mm В 2.369 W/m2-K 30 mm 0.257 WIm2-K 40 mm Oil inside h = 120.3T3 (T in K) 2 Air outside h = 0.27T3 (T in K) Determine heat losses of the pipe, and what must be the temperature of the oil to decrease the heat losses by 20%?
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