Abstract
In order to optimize the design and usage of Paddy Drying and Storage Facility, it is effective to get the characteristics of moisture content of received paddy in the facility. In this paper, the multiple regression equation of moisture content was proposed. Moreover, the moisture content of standing paddy which influences the change of moisture content of received paddy was studied.
1. The distribution of moisture content of received paddy is approximated by normal distribution, and the linear relationship between the mean and standard deviation was obtained.
2. The predictor variables of weather condition such as receiving day (D), precipitation of the day before (P'), duration of sunshine (S), and relative humidity (H) were selected for the analysis. The multiple regression equation shown in Eq. (5) was derived from data measured for 4 years, and the coefficient of multiple correlation is about 0.7.
3. The moisture content of standing paddy starts to decrease at daybreak, and the drying rate is about 0.7% w.b./h. The moisture content of standing paddy is lowest at 4-5p.m., then the absorption occurs untill daybreak of next day.
4. The standing paddy absorbs or dries due to the difference of the equilibrium moisture conetent, and the absorbing constant (or drying) is about 0.25h-1.
5. The effect of precipitation on the moisture content of standing paddy remains on the next day, and this fact corresponds to the effect of the precipitation of the day before on the multiple regression equation of the moisture content of received paddy in the facility.
