Design Guidelines for High Performance Industrial Furnaces - High Temperature Air Combustion: From Energy Conservation to Pollution Reduction - page 317

Heat treating
materials

FIGURE 5.73 Dimension of furnace height.

Clearance (L) between
furnace ceiling and upper-
surface of fan is necessary
for restricting the wind
volume passing through this
cylindrical face under 15m/s.

L

D fan

FIGURE 5.74 Clearance between furnace ceiling and fan.

3. Cycle time according to treating capacity (traveling speed)
4. Furnace length regarding the heating time, soaking time, and cooling
time
(Deciding furnace length for a batch furnace: length of heating

materials + about 2 m)
d. Necessary heat capacity in furnace: in general, the heating materials
in a heat treatment furnace are treated by the heat pattern as shown in
Figure 5.75 . The heat capacity necessary for conducting the heat pattern
is calculated as follows
1. Heating materials H CP

H CP = M ( C F - C room )