Absrtact: In view of the problems of low drying efficiency, high energy consumption and poor quality of hickory nuts by hot air, the effects of microwave power and loading capacity on the microwave drying characteristics of hickory nuts were studied by single factor experiment. According to the law of water content change of walnut nut in microwave drying equipment, the law of water content and water loss rate of walnut nut dry base changing with time under different microwave power and loading was discussed, and the microwave drying dynamics model of walnut was established.
The results showed that microwave power had a greater effect on the drying rate of pecan nuts than the loading rate, and the microwave drying process of pecan nuts could be divided into two stages: accelerated drying stage and slow drying stage. According to the analysis, the dynamic model of microwave drying of pecan nuts satisfies Page equation. According to the drying experimental data, the drying model is solved by regression fitting with MATLAB software. The coefficient of the model is over 0.99.
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