Abstract
In order to investigate the dependence of drying air humidity on drying rate for dehumidifying drying, thin layer drying characteristics of rough rice were measured under the condition of drying air temperature at 10, 20, 30 and 40°C, and drying air humidity in the range of 20.4 to 75.6 percent (RH).
As a result, the experimental equation for drying rate was shown on condition of various moisture contents of rough rice in the practical use was shown, and it was clear that the drying rate of rough rice was highly dependent upon the drying air humidity for dehumidifying drying. Relationship between drying air temperature and humidity, and drying rate coefficient, transference moisture content, temporary and dynamic equilibrium moisture content were also investigated and their experimental equations were shown.
