The radiation heat flux from a heating element at a temperature of 800°C, in a furnace maintained at 300°C is 8 kW/m2. The flux, when the element temperature is increased to 1000°C for the same furnace temperature is_____________________?

Question

Accepted Answer

16.5 kW/m2. Radiation heat flux is proportional to the fourth power of the absolute temperature difference. Increasing the element temperature from 800°C to 1000°C increases the flux significantly.