Question

A flat surface is covered with insulation with a thermal conductivity of 0.08 W/ mK. The temperature at the interface between the surface and the insulation is 300°C. The outside of the insulation is exposed to air at 30°C, and the heat trans- fer coefficient for convection between the insulation and the air is 10 W/m². K. Ignoring radiation, determine the minimum thickness of insulation, in m, such that the outside of the in- sulation is no hotter than 60°C at steady state.​

Answer 1

Answer:

A flat surface is covered with insulation with a thermal conductivity of 0.08 W/m-K. The temperature at the interface between the surface and the insulation is 300oC.

The outside of the insulation is exposed to air at 30oC and the convection heat transfer coefficient between the insulation and the air is 10 W/m2-K.