Studies on the Characteristics of Moisture Transfer in Cereal Grain (Part 1)

An Investigation of Two Falling-rate Drying Periods with Two-Tanks Model

Abstract

The drying characteristics of two stages of falling-rate periods observed in grain drying have been assumed to depend on the presence of brown rice and husk, respectively.
In this paper, the water tanks model was developed based on the grain configuration to describe these drying characteristics for rough rice and barley drying.
Concretely speaking, the authors supposed that brown rice and husk were two water tanks combined with each other in series and that the tanks had each capacity and the connected pipes of each resistance. And then, this model was called as “Two-Tanks Model”.
From the comparison of mathematical model and experimental results for thin layer drying, the usefulness of this model was recognized.
Dynamic equilibrium moisture content and the effect of air temperature on drying constants were investigated.