In a pharmaceutical plant, a copper pipe (kc= 400 W/m-K) with innerdiameter of 20 mm and wall thickness of 0.07 m is used for carrying liquidoxygen to a storage tank. The liquid oxygen flowing in the pipe has anaverage temperature of -200°C and a convection heat transfer coefficient of120 W/m2.K. The condition surrounding the pipe has an ambient airtemperature of 20°C and a combined heat transfer coefficient of 20 W/m2.K.If the dew point is 10°C, determine the thickness of the insulation (k;= 0.05W/m-K) around the copper pipe to avoid condensation on the outer surface.Assume thermal contact resistance is negligible.Liq. O2, –200°Ch= 120 W/m²-K´- Pipe, k̟ = 400 W/m-KInsulationk; = 0.05 W/m-KSurrounding air, 20°Cheombined = 20 W/m² KDew point = 10°CD2D3The thickness of the insulation ism.

GivenD1=20mmt=0.07m=70mmD2=70+70=140mmTi=-200°C=-200+273=73kT∞=20°C=20+273=293K

Answered: In a pharmaceutical plant, a copper…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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