Drying Characteristics of Soybeans
Keywords:
rewetted soybeans,
single-layer drying,
cylinder model,
drying simulation,
Arrhenius type equation
1993 Volume 55 Issue 1 Pages 51-56
Details
1993 Volume 55 Issue 1 Pages 51-56
Samples of about 100g of soybeans, variety “TAMAHOMARE”, were conditioned to 35% moisture content (w. b.) and single layer drying tests were made for 72hours at 30, 40, 50 and 60°C and humidity in the range of 20 to 70 percent (RH). The sample pan section was 150mm in diameter with a 5mm opening screen replacing the bottom and air flow rate set at 10m3/h (0.157m/s).
Having plotted the free moisture ratios on the semilogarithmic paper versus drying time, the intercept of asymtotic straight line of the curvature became to 0.69.
For this reason, an infinite cylinder model was presented and quite good agreement was obtained between the experimental results and the model predicions.
The drying rate coefficients K2(1/h) estimated from those experimenal data were resolved into Arrhenius type equation as follows;
K2=482.48·exp(-2583.6/T)
Standard deviation 1.19×10-3(1/h)
