Summary
The concept of this study is to obtain optimum drying condition of the multiple bin dryer with a single fan. The purpose is to estimate the air flow rates in each bin on various ventilating condition, in order to dry grain by safe and efficient method.HomePage
In this paper, when the volume of bulk rough rice in each bin could be estimated, the static pressure at plenum chamber with multiple bins was estimated and the air flow rates in each bin were computed. Relationship among the static pressure at plenum chamber, PT, the sedimentary depth of bulk rough rice, Li, and the resistance of air flow, DP, was investigated and, relationship between the moisture content, Mi, and the apparent density, di, was also obtained. The empirical equations for the prediction of the ventilating condition were derived from these results. Consequently, it was shown that the limits of air flow rate and volume of rough rice in each bin were could be predicted by the computed simulation using these equations.
In part 2, total resistance of air flow are measured under the conditions of different sedimentary depth of rough rice and various ventilating area. It shows that the estiniated value is consistent with the measured value, and the prediction with computed simulation could be applied to the actual operation of the multiple bin dryer.Keywords: multiple bin dryer, resistance of air flow, air flow rate