Physics · Heat Transfer
Two insulating materials of thermal conductivity K and 3K are available for lagging a pipe carrying a hot fluid. If the radial thickness of each material is the same, how should they be arranged to minimize heat loss?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The material with higher thermal conductivity should be used for the inner layer and the one with lower thermal conductivity for the outer layer.
- 2The material with lower thermal conductivity should be used for the inner layer and the one with higher thermal conductivity for the outer layer.✓
- 3The sequence in which the insulating materials are used is immaterial.
- 4It is not possible to judge unless the precise numerical dimensions are provided.
Correct answer
The material with lower thermal conductivity should be used for the inner layer and the one with higher thermal conductivity for the outer layer.
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