An alternate procedure for the calculation of rotary-dryer is proposed, using the operating characteristics and the ratio of the time rate of heat capacity. The number of transfer unit in the period of constant rate of drying may be calculated from the knowledge of the humidity-increase in the dryer.
Drying characteristic curves of ricebran are plotted from the experimental data and the diffusion data and the diffusion coefficients of the moisture in the ricebran are calculated.
An example for the calculation of rotary-dryer is given.