An insulated steam pipe located where the ambient temperature is 32°C, has an inside diameter of 50 mm with 10 mm thick wall. The outside diameter of the corrugated asbestos insulation is 125 mm and the surface coefficient of still air, ho = 12 W/m²-K. Inside the p steam having a temperature of 150°C with film coefficient h; = 6000 W/m2-K. Thermal conductivity of pipe and asbestos insulation a and 0.12 W/m-K respectively. Determine the heat loss per unit length of 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.
Chapter1: Basic Modes Of Heat Transfer
Section: Chapter Questions
Problem 1.48P: A horizontal, 3-mm-thick flat-copper plate, 1-m long and 0.5-m wide, is exposed in air at 27C to...
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An insulated steam pipe located where the ambient temperature is 32°C, has an inside diameter of 50 mm with 10 mm thick wall. The
outside diameter of the corrugated asbestos insulation is 125 mm and the surface coefficient of still air, h, = 12 W/m²-K. Inside the pipe is
steam having a temperature of 150°C with film coefficient h; = 6000 W/m2-K. Thermal conductivity of pipe and asbestos insulation are 45
and 0.12 W/m-K respectively. Determine the heat loss per unit length of pipe.
O 120 W
O 110 W
O 140 W
O 130 W
Transcribed Image Text:An insulated steam pipe located where the ambient temperature is 32°C, has an inside diameter of 50 mm with 10 mm thick wall. The outside diameter of the corrugated asbestos insulation is 125 mm and the surface coefficient of still air, h, = 12 W/m²-K. Inside the pipe is steam having a temperature of 150°C with film coefficient h; = 6000 W/m2-K. Thermal conductivity of pipe and asbestos insulation are 45 and 0.12 W/m-K respectively. Determine the heat loss per unit length of pipe. O 120 W O 110 W O 140 W O 130 W
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