On the drying of the rice with infrared energy—Part (II)

Abstract

From the results of the experiment that the air volume of the ventilation is changed, it is found that the most effective ventilation to dry the rice quickly is the natural ventilation.
But the one to minimize the moisture content of the air in the drying box is the 2.8m/s of air speed at the exhaust hole of this drying equipment.
When the reducing speed of the moisture content in a rice increase over 0.04-0.05% per minute, the cracking percentage of the rice rises.
But if we consider the fore-heating and maintenance of heat, we finish the drying about 5 or 10 minutes under the severe radiation (0.21 Watt/cm²) and that cost is 400-500 Yen per Tan.