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Radiation-:-Exchange-between-Surfaces

A 250 mm by 250 mm ingot casting, 1.5 m high and at 1225 K temperature, is stripped from its mold. The casting is made to stand on end on floor of a large foundry whose wall, floor and roof can be assumed to be at 300 K temperature. Make calculation for rate of radiant heat interchange between casting and room. The casting material has an emissivity of 0.85


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This Chapter Radiation-:-Exchange-between-Surfaces consists of the following topics

A thermos flask has a double walled bottle and the space between the walls is evacuated so as to reduce the heat flow. The bottle surfaces are silver plated and the emissivity of each surface is 0.025. If the contents of the bottle are at 375 K, find the rate of heat loss from the thermos bottle to the ambient air at 300 K

A 250 mm by 250 mm ingot casting, 1.5 m high and at 1225 K temperature, is stripped from its mold. The casting is made to stand on end on floor of a large foundry whose wall, floor and roof can be assumed to be at 300 K temperature. Make calculation for rate of radiant heat interchange between casting and room. The casting material has an emissivity of 0.85

Interchange factor for infinitely long concentric cylinders is given by

A 250 mm by 250 mm ingot casting

1.5 m high and at 1225 K temperature

is stripped from its mold. The casting is made to stand on end on the floor of a large foundry whose wall

floor and roof can be assumed to be at 300 K temperature. Make calculation for the rate of radiant heat interchange between the casting and the room. The casting material has an emissivity of 0.85

Radiation : Exchange between Surfaces

Heat-Transfer