A 1.0 mm diameter wire is maintained at a temp. of 400 °C and exposed to a convection environment at 40 °C with h= 120 W/m2. °C. Calculated the thermal conductivity that will just cause an insulation thickness of 0.2 mm to produce a "critical radius".

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Example 5
A 1.0 mm diameter wire is maintained at a temp. of
400 °C and exposed to a convection environment
at 40 °C with h= 120 W/m?. °C. Calculated the
thermal conductivity that will just cause an
insulation thickness of 0.2 mm to produce a "critical
radius".
Answer: k= 0.084 W/m.°C
Transcribed Image Text:Example 5 A 1.0 mm diameter wire is maintained at a temp. of 400 °C and exposed to a convection environment at 40 °C with h= 120 W/m?. °C. Calculated the thermal conductivity that will just cause an insulation thickness of 0.2 mm to produce a "critical radius". Answer: k= 0.084 W/m.°C
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