GATE ME 2014 Set 4 — Question 52
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Heat Transfer → Conduction → 1D Steady Conduction
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Question
A plane wall has a thermal conductivity of W/m.K. If the inner surface is at and the outer surface is at , then the design thickness (in meter) of the wall to maintain a steady heat flux of W/m should be _______
Correct answer
0.33 to 0.35
Solution
According to Fourier's Law of heat conduction for a plane wall:Where:
(Heat flux)
(Thermal conductivity)
(Inner surface temperature)
(Outer surface temperature)
is the thickness of the wall.Substituting the values:
(Heat flux)
(Thermal conductivity)
(Inner surface temperature)
(Outer surface temperature)
is the thickness of the wall.Substituting the values:
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