Mathematical model of carrot slices drying
2011
Aboltins, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Upitis, A., Latvia Univ. of Agriculture, Jelgava (Latvia)
Drying of carrot slices was investigated in a laboratory dryer with a heater with thermostat. Carrots were grated in slices with a thickness of 1-2 mm, width of 4-5 mm and placed in the perforated container with layer thickness 30-35 mm. Based on the experimental data, the time dependency of the moisture content and drying rate were calculated and presented. Using drying rate, the layer of carrot slices drying was simulated and the received results compared with the experimental data. The obtained measurement results are in high correlation with calculations. The presented mathematical model contains a system of partial differential equations including the matter and environmental temperatures (Θ(x, t) and T(x, t)) and mass exchange (W(x, t), d(x, t)) and it can be used for thick, porous medium layers, containing small particles, drying. The experimental and theoretical results showed that the carrot slices 3.5 cm thick layer was dry in eight hours using a convective airflow with temperature 37 deg C.
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