The thermal conductivity of a sheet of rigid, extruded insulation is reported to be k 0.029 W/m K. The measured temperature difference across a 20-mm-thick sheet of the material is T1 T2 10 C.
(a) Whatistheheatfluxthrougha2m2msheetof the insulation?
(b) What is the rate of heat transfer through the sheet of insulation?