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A steam pipe (k = 35 W/m-K) carrying steam at 260°C is of 15-cm diameter and 20-mm thickness. The convection coefficient on the inside is 45 W/m2 -K. An insulation of 4 cm thickness with a conductivity of 0.08 W/m-K is installed over the pipe with a contact resistance of 6 × 10–4 °C-m2 /W. The outside is exposed to surroundings at 30°C with a convection coefficient of 18 W/m2 -K. Determine the heat flow per unit length of pipe and the interface temperatures.

A steam pipe (k = 35 W/m-K) carrying steam at 260°C is of 15-cm diameter and 20-mm thickness. The convection coefficient on the inside is 45 W/m2 -K. An insulation of 4 cm thickness with a conductivity of 0.08 W/m-K is installed over the pipe with a contact resistance of 6 × 10–4 °C-m2 /W. The outside is exposed to surroundings at 30°C with a convection coefficient of 18 W/m2 -K. Determine the heat flow per unit length of pipe and the interface temperatures.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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A steam pipe (k = 35 W/m-K) carrying steam at 260°C is of 15-cm diameter and 20-mm
thickness. The convection coefficient on the inside is 45 W/m2
-K. An insulation of 4 cm
thickness with a conductivity of 0.08 W/m-K is installed over the pipe with a contact
resistance of 6 × 10–4
°C-m2
/W. The outside is exposed to surroundings at 30°C with a
convection coefficient of 18 W/m2
-K. Determine the heat flow per unit length of pipe and
the interface temperatures.

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