A furnace wall consists of 100 mm thick refractory brick and

Last updated: 6/7/2023

A furnace wall consists of 100 mm thick refractory brick and 800 mm thick insulating fire brick separated by an air gap The outside wall is covered with a 20mm thick ness of plaster The inner surface of the wall is at 1500 C and the ambient temperature is at 26 c Calculate the rate at which heat is lost per m of the wall surface The heat transfer coefficient of the ambient air is mentioned to be 22W m K and the air gap resistance to the heat flow is given as 0 16 K W The thermal conductivity of refractory brick insulating fire brick and plaster are 1 5 0 25 and 0 13 W m K respectively Also calculate the interface temperatures of the walls 1100 c RF Bri Insulating Fire Brick R Eins 26 C h 22W m K