Modeling and Simulation of Potato Microwave Drying Dynamics

Abstract: Using the self-made microwave hot air coupling drying system, the temperature and water content of potato diced under different microwave powers (600, 900, 1 200 and 1500 W) were tested to obtain the microwave drying curve, drying rate curve and drying of potato. The optimal microwave power density was established to establish a microwave drying kinetic model and an effective moisture diffusion model for the potato.

microwave drying equipment

The effective water diffusion coefficient model of potato diced was substituted into COMSOL Multiphysics software to establish a three-field coupling model of electromagnetic field, solid heat transfer and dilute matter transfer. The results showed that the microwave drying rate of potato diced entered after the acceleration period of 270 s. During the deceleration period, the optimal microwave power density of the microwave drying equipment is 6 W/g. The drying model can be described by the Page equation. The effective moisture diffusion coefficient of the microwave drying of the potato is 4.35×10–9~9.02×10–9 m2/s. .

 potato microwave drying