A 3-in. Schedule 40 iron pipeline carries steam at 6 atm gauge. The line is uninsulated and is 70 m long. The surrounding air is at 25°C. The emissivity of the pipe wall is 0.70. How many kilograms of steam will condense per hour? What percentage of the heat loss is from conduction- convection?

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 6.7P
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A 3-in. Schedule 40 iron pipeline carries steam at 6 atm gauge. The line is uninsulated and is 70 m long. The surrounding air is at 25°C. The emissivity of the pipe wall is 0.70. How many kilograms of steam will condense per hour? What percentage of the heat loss is from conduction- convection?

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