The research on dynamic modeling of thin layer carrots

For investigating moisture content variation law of thin layer carrots during hot-air drying, In this paper, the dynamic modeling and drying characteristics were studied, two models were used in the experimental data, the effects of air temperature, air-flow rate and sample thickness on drying kinetics of carrot slices were investigated, and the moisture effective diffusion coefficients were calculated by the Fick´s diffusion model. Results showed that dynamic modeling of thin layer carrots can be described by Page model, the coefficients of equation were obtained through regression analysis, and the D_eff with air temperature, air-flow rate and sample thickness equation was obtained by multiple linear regression, the D_eff value increased from 0.84×10^-9 to 6.69×10^-9m²/s as drying temperature, air-flow rate and sample thickness increased.