Design Guidelines for High Performance Industrial Furnaces - High Temperature Air Combustion: From Energy Conservation to Pollution Reduction - page 320

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0.39

FIGURE 5.76 Distribution of wind rate generated by fan.

Inside width
of furnace

FIGURE 5.77 Region of “down blowing” in furnace.

g. Calculation of heating and cooling: calculation of heating and cooling
can be conducted by using φ CH of surface of coils and the heat con-
duction coefficient of inside coils. In this case, the calculation of
discrete differential equation of heat conduction can be done on a
personal computer. Details can be seen in the paper “The Method of
Numerical Calculation of Non-stable Heat Conduction” (The Iron and
Steel Institute of Japan).

5.4.4 M ELTING F URNACE

5.4.4.1 Energy Savings and Exhaust Gas Regulation

It is required that the fuel used for aluminum-melting furnaces be cost-effective, and
often oil such as heavy oil Type A is used. Aluminum-melting furnaces are batch-
operated, and the temperature inside the furnace is raised from 700˚C to approxi-
mately 1150˚C, when the melting of aluminum starts. As a means of recovering