FIG. 6. Effect of air flow rate and percentage of air recycle on simulated
value of specific energy consumption (SEC) of one-stage drying of 220 min
(drying temperature of 110 C) and two-stage crumb rubber drying at
initial drying temperature of 130 (40 min) and 110 C (180 min), initial
moisture content (Min) of 45 % dry basis and desired final moisture content (Mf) of 0.5 % dry basis, crumb rubber bed depth 25 cm (air flow rates
of 432 and 600 m3 =min-m3 of rubber are equivalent to 2.2 and 5 m =s,
respectively).