A pipe transports refrigerant which goes at a temperature of -60 ° C, it has 2 ”internal diameter and 2.3” external diameter with a thermal conductivity of K1= 389W / mK. Insulation of 30cm thick is placed on it with a thermal conductivity of k20.04W / mK the internal convection coefficient is 150 W / m2K. the air is moving at 10m / s on the external surface of the tube which is at a temperature of 20 ° C and the environment is at 40 ° C. Find the external convection coefficient and the total transfer rate of the system.
A pipe transports refrigerant which goes at a temperature of -60 ° C, it has 2 ”internal diameter and 2.3” external diameter with a thermal conductivity of K1= 389W / mK. Insulation of 30cm thick is placed on it with a thermal conductivity of k20.04W / mK the internal convection coefficient is 150 W / m2K. the air is moving at 10m / s on the external surface of the tube which is at a temperature of 20 ° C and the environment is at 40 ° C. Find the external convection coefficient and the total transfer rate of the system.
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter6: Forced Convection Over Exterior Surfaces
Section: Chapter Questions
Problem 6.4P: An electrical transmission line of 1.2-cm diameter carries a current of 200 amps and has a...
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A pipe transports refrigerant which goes at a temperature of -60 ° C,
it has 2 ”internal diameter and 2.3” external diameter with a thermal conductivity of K1= 389W / mK. Insulation of 30cm thick is placed on it with a thermal conductivity of k20.04W / mK the internal convection coefficient is 150 W / m2K. the air is moving at 10m / s on the external surface of the tube which is at a temperature of 20 ° C and the environment is at 40 ° C. Find the external convection coefficient and the total transfer rate of the system.
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