Question

The furnace wall consists of 200m of fire brick and 115m insulating brick having thermal conductivity of 0.7m and 25w/m² respectively. Calculate the heat transfer per metre square of the furnace wall when the temperature difference across the slab is 500°C

Answer 1

$\dot Q=(A_1+A_2)\frac{k_1k_2}{k_1+k_2}∆t=107~kW.$