A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a wall thickness of 5.5 mm. It is covered with a 9-cm layer of insulation häving k =0.5 W/m - °C, followed by a 4-cm layer of insulation having k =0.25 W/m - °C. The outside temperature of the insulation is 20°C. Calculate the S heat lost per meter of length. Assume k =47 W/m. °C for the pipe.

A hot steam pipe having an inside surface temperature of 250°C has an inside diameter of 8 cm and a wall thickness of 5.5 mm. It is covered with a 9-cm layer of insulation häving k =0.5 W/m - °C, followed by a 4-cm layer of insulation having k =0.25 W/m - °C. The outside temperature of the insulation is 20°C. Calculate the S heat lost per meter of length. Assume k =47 W/m. °C for the pipe.

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.33P

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