Question

A stone kiln has been built with 10 cm thick terracotta plates, stacked to form a working space of 3.8 m

deep by 10 m in diameter. The pit is fitted with a limestone plug with a vent hole in the center. The stone

plug is 5 cm thick.

The interior of the pit is heated to 850°C. The surroundings are at 20°C. coefficent conduct for terakota is 0.31 W/mk limestone 3.2W/mk How much heat is lost

through the walls of the kiln?

How much heat is lost through the stone plug?

If you find that you are having to add 950 kJ/s of heat to maintain the temperature, what is the

heat lost by convection (and removing water, etc.)?

Answer 1

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