A double-pipe heat exchanger is constructed of a copper (k = 380 W/m-°C) inner tube of internal diameter D₁ = 1.2 cm and external diameter Do 1.6 cm and an = outer tube of diameter 3.0 cm. The convection heat transfer coefficient is reported to be hi = 700 W/m²-°C on the inner surface of the tube and ho = 1400 W/m2-°C on its outer surface. For a fouling factor Rfi = 0.0005 m²-°C/W on the tube side and Rfo = 0.0002 m²-°C/W on the shell side, determine the overall heat transfer coefficient based on the outer surface area of the tube. _______W/m²-K

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
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Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.28P
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A double-pipe heat exchanger is constructed of a copper (k = 380 W/m-°C) inner tube of internal diameter D₁ = 1.2 cm and external diameter Do 1.6 cm and an = outer tube of diameter 3.0 cm. The convection heat transfer coefficient is reported to be hi = 700 W/m²-°C on the inner surface of the tube and ho = 1400 W/m2-°C on its outer surface. For a fouling factor Rfi = 0.0005 m²-°C/W on the tube side and Rfo = 0.0002 m²-°C/W on the shell side, determine the overall heat transfer coefficient based on the outer surface area of the tube. _______W/m²-K
double-pipe
constructed of a copper (k = 380 W/m-°C)
inner tube of internal diameter Di
A
heat
exchanger
is
= 1.2 cm
and external diameter Do
= 1.6 cm and an
outer tube of diameter 3.0
cm.
cm. The
convection heat transfer coefficient is
reported to be hi = 700 W/m2_°C on the
inner surface of the tube and ho
1400
W/m2-°C on its outer surface. For a fouling
factor Rf i =
0.0005 m2-°C/W on the tube
side and Rfo = 0.0002 m2-°C/W on the shell
side, determine the overall heat transfer
coefficient based on the outer surface area
of the tube.
W/m2-K
Transcribed Image Text:double-pipe constructed of a copper (k = 380 W/m-°C) inner tube of internal diameter Di A heat exchanger is = 1.2 cm and external diameter Do = 1.6 cm and an outer tube of diameter 3.0 cm. cm. The convection heat transfer coefficient is reported to be hi = 700 W/m2_°C on the inner surface of the tube and ho 1400 W/m2-°C on its outer surface. For a fouling factor Rf i = 0.0005 m2-°C/W on the tube side and Rfo = 0.0002 m2-°C/W on the shell side, determine the overall heat transfer coefficient based on the outer surface area of the tube. W/m2-K
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