A 15 cm outer diameter steam pipe is covered with 5 cm high temperature insulation (k = 0.85 W/m ⁰C) and 4 cm of low temperature (k = 0.72 W/m ⁰C). The steam is at 500 ⁰C and ambient air is at 40 ⁰C. Neglecting thermal resistance of steam and air sides and metal wall. Calculate: The heat loss from 1.0 m length of the pipe. The temperature drops across the insulation.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A 15 cm outer diameter steam pipe is covered with 5 cm high temperature insulation (k = 0.85 W/m ⁰C) and 4 cm of low temperature (k = 0.72 W/m ⁰C). The steam is at 500 ⁰C and ambient air is at 40 ⁰C. Neglecting thermal resistance of steam and air sides and metal wall. Calculate:

  • The heat loss from 1.0 m length of the pipe.
  • The temperature drops across the insulation.
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