A pipe in a manufacturing plant is transporting superheated vapor at a mass flow

Question

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 degree C. FIGURE P2-68 The temperature drop between the inlet and exit of the pipe is 7 degree C, and the constant pressure specific heat of vapor is 2190 J/kg degree C. If the air temperature in the manufacturing plant is 25 degree C, determine the heat transfer coefficient as a result of convection between the outer pipe surface and the surrounding air.

Explanation / Answer

A pipe in a manufacturing plant is transporting superheated vapor at a mass flow

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