The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates heat by convection and radiation to air and wall, respectively. The temperatures of air and wall are 15 oC. The insulation layer has a thickness of 10 cm and a thermal conductivity of 15 W/m.K. What is the value of the heat transfer coefficient at the outside surface of the layer, if the temperature at the outside surface should not exceed 225 oC? (The emissivity and the width of the surface are 0.3 and 1 m., respectively. =5.67x10-8 W/m2K4).
The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates heat by convection and radiation to air and wall, respectively. The temperatures of air and wall are 15 oC. The insulation layer has a thickness of 10 cm and a thermal conductivity of 15 W/m.K. What is the value of the heat transfer coefficient at the outside surface of the layer, if the temperature at the outside surface should not exceed 225 oC? (The emissivity and the width of the surface are 0.3 and 1 m., respectively. =5.67x10-8 W/m2K4).
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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The inside surface of an insulation layer is maintained at 350oC and the outside surface dissipates
heat by convection and radiation to air and wall, respectively. The temperatures of air and wall are 15 oC.
The insulation layer has a thickness of 10 cm and a thermal conductivity of 15 W/m.K. What is the value of
the heat transfer coefficient at the outside surface of the layer, if the temperature at the outside surface
should not exceed 225 oC? (The emissivity and the width of the surface are 0.3 and 1 m., respectively.
=5.67x10-8 W/m2K4).
Transcribed Image Text:Tw=15°
Т3225°C
Ть 3350°C
e=0.3
To=15°C
ho=?
10 cm
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