Furnace Technology
The method of Lobo and Evans is concerned with the calculation of the

Mass transfer co-efficient
Heat transfer by forced convection in a reboiler
Heat absorption in radiant section of a furnace
Heat transfer in vacuum condensers

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Furnace Technology
Which is not accomplished in an underfired furnace?

Increase in heating capacity/m² of floor space
Reduction in the temperature of furnace gases
Elimination of cold spot at the bottom of the charge
Portection of the periphery of the charge from excessive radiation

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Furnace Technology
The amount of combustible escaping uncon-sumed from the furnace, depends upon the

Air preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)
All of these
Air supplied and furnace temperature
Burner design (thoroughness of mixing versus stratification)

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