A copper pipe that carries refrigerant at - 20 ° C has an outer diameter of 10 mm and is exposed to air at 25 ° C whose coefficient of heat transfer by air convection is h = 50 W/ (m ^2 • K) . It is proposed to apply insulation with a conductivity of < = 0.5 W/(m • K). Determine the thickness beyond which heat transfer to the pipe will be reduced. Calculate the heat transfer for insulation chicknesses of 2.5, 5 and 7.5 mm, for this consider a section of pipe 1 m long.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A copper pipe that carries refrigerant at - 20 ° C
has an outer diameter of 10 mm and is exposed to
air at 25 ° C whose coefficient of heat transfer by
air convection is h = 50 W/(m ^ 2 • K) . It is
proposed to apply insulation with a conductivity of
k = 0.5 W/ (m • K). Determine the thickness beyond
which heat transfer to the pipe will be reduced.
Calculate the heat transfer for insulation
thicknesses of 2.5, 5 and 7.5 mm, for this consider
a section of pipe 1 m long.
%3D
Transcribed Image Text:A copper pipe that carries refrigerant at - 20 ° C has an outer diameter of 10 mm and is exposed to air at 25 ° C whose coefficient of heat transfer by air convection is h = 50 W/(m ^ 2 • K) . It is proposed to apply insulation with a conductivity of k = 0.5 W/ (m • K). Determine the thickness beyond which heat transfer to the pipe will be reduced. Calculate the heat transfer for insulation thicknesses of 2.5, 5 and 7.5 mm, for this consider a section of pipe 1 m long. %3D
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