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5. Appendix A – Transmission of thermal energy in a continuous annealing furnace
Heat in a continuous annealing furnace is transmitted by radiation and convection. For thin sheet metal, we verify that :
the temperature gradient across the strip thickness is negligible;
heat exchange by conduction in the strip is negligible.
5.1 Transmission of thermal energy by radiation
To establish the temperature-time relationship for the belt, we would need to know the temperature and emissivity of the furnace's radiant elements, and the emissivity of the belt.
In fact, all that is known is the temperature T c of the control torque and the radiation exchange factors F ...
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Appendix A – Transmission of thermal energy in a continuous annealing furnace
Appendix B – Measuring belt temperature by radiation
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