A 1-cm thick, AISI 302 stainless steel wall is insulated with a 5 cm-thick layer of fiberglass (density of 28 kg/m3) on its outside surface. In a test with ambient air at 300K, the surface temperature of the insulation is 310K. hc for the outside surface is 6 W/m2 K and the emissivity of the insulation is 0.8.

*Determine the temperature of the inner surface of the stainless steel. Hint: this is a problem where you need to consider materials properties as a function of temperature. see attached tables. (Hint: Develop a thermal circuit)

Table A.3 Insulators and building materials: Thermal properties 879 Table A.1b Solid metals: Temperature depent for metal compositions)