Answered: In a pharmaceutical plant, a copper…

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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Question

In a pharmaceutical plant, a copper pipe (kc=400 W/mK) with inner diameter of 20 mm and wall thickness of 2.5 mm is used for carrying liquid nitrogen to a storage tank. The liquid oxygen flowing in the pipe has an average temperature of -200°C and a convection heat transfer coefficient of 120 W/m2K. The condition surrounding the pipe has an ambient air temperature of 20C and a combined heat transfer coefficient of 20 W/m2K. If the dew point is 10°C, determine the thickness of the insulation (ki=0.05W/mK) around the copper pipe to avoid condensation on the outer surface. Assume thermalcontact resistance is negligible.

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