A pipe in a manufacturing plant is transporting superheated vapor at a mass flow rate of 0.3 kg/s. The pipe is 10 m long, has an inner diameter of 5 cm and pipe wall thickness of 6 mm. The pipe has a thermal conductivity of 17 W/m.K, and the inner pipe surface is at a uniform temperature of 120 °C. The temperature drop between the inlet and the exit of the pipe is 7 °C, and the constant pressure specific heat of vapor is 2190 J/kg.°C. If the air temperature in the manufacturing plant is 25°C, determine the heat transfer coefficient as a result if convection between the outer pipe surface and the surrounding air. T(r) = 120°C Superheated Air, 25°C r2 vapor r1 0.3 kg/s L = 10 m Tin-Tout = 7°C

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Chapter7: Forced Convection Inside Tubes And Ducts
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A pipe in a manufacturing plant is transporting superheated vapor at a mass flow rate
of 0.3 kg/s. The pipe is 10 m long, has an inner diameter of 5 cm and pipe wall thickness
of 6 mm. The pipe has a thermal conductivity of 17 W/m.K, and the inner pipe surface
is at a uniform temperature of 120 °C. The temperature drop between the inlet and the
exit of the pipe is 7 °C, and the constant pressure specific heat of vapor is 2190 J/kg.°C.
If the air temperature in the manufacturing plant is 25°C, determine the heat transfer
coefficient as a result if convection between the outer pipe surface and the surrounding
air.
T(r) = 120°C
Superheated
Air, 25°C
r2
vapor
r1
0.3 kg/s
L = 10 m
Tin-Tout = 7°C
Transcribed Image Text:A pipe in a manufacturing plant is transporting superheated vapor at a mass flow rate of 0.3 kg/s. The pipe is 10 m long, has an inner diameter of 5 cm and pipe wall thickness of 6 mm. The pipe has a thermal conductivity of 17 W/m.K, and the inner pipe surface is at a uniform temperature of 120 °C. The temperature drop between the inlet and the exit of the pipe is 7 °C, and the constant pressure specific heat of vapor is 2190 J/kg.°C. If the air temperature in the manufacturing plant is 25°C, determine the heat transfer coefficient as a result if convection between the outer pipe surface and the surrounding air. T(r) = 120°C Superheated Air, 25°C r2 vapor r1 0.3 kg/s L = 10 m Tin-Tout = 7°C
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