A furnace wall in the pharmaceutical industry is constructed from 220 mm of heat resistant clay bricks, 150 mm of face bricks, 50 mm of 85% magnesia and 3 mm of metal plate on the outside. If the...

Extracted text: A furnace wall in the pharmaceutical industry is constructed from 220 mm of heat resistant clay bricks, 150 mm of face bricks, 50 mm of 85% magnesia and 3 mm of metal plate on the outside. If the inside surface temperature is 1500°C and the outside surface temperature is 90°C, calculate the following: 3.1 The heat loss in kJ/h m2. 3.2 The temperature between layers; NB: k (heat resistant clay bricks) = 4 kJ/mh°C; k (Face brick) = 2.8kJ/mh°C; k (85% magnesia) = 0.24kJ/m h°C; and k (metal plate) = 240 kJ/m h°C