To explore the application of new desiccant wheel dehumidification drying technology in the field of white radish slices drying, the drying characteristics of white radish slices under different temperatures (35, 40, 45 ℃), different air speeds (1, 2, 3 m/s) and different slice thicknesses (3, 5, 7 mm) were experimentally studied.Results showed that the drying time of white radish slices under the conditions of 5 mm slice thickness and 1 m/s drying wind speed was 5.5 h at 35 ℃, and the drying time decreased significantly with the increase of the drying temperature, and the corresponding drying time at 45 ℃ was 4.0 h.In addition, the drying time decreased significantly with the decrease of the slice thickness, and the drying times under the thicknesses of 7 mm, 5 mm, and 3 mm were 6.5 h, 4.0 h, and 2.5 h, respectively.Meanwhile, increasing the drying air speed can also improve the drying rate of radish slices, and the drying rate of 3 m/s can be increased by 14% compared with that of 1 m/s.Heat pump-low temperature regeneration desiccant wheel dehumidification combined drying and single heat pump drying compared with the drying time reduced by 1.0 h, rehydration capacity increased by 6%, with higher drying rate and drying quality.In addition, through the analysis of the drying mathematical model Page model, this paper can better describe the water change law in the drying process of white radish slices.
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