The mathematical model of carrot slices drying
2011
Aboltins, A., Latvia University of Agriculture, Jelgava (Latvia). Faculty of Engineering, Institute of Agriculture Machinery | Upitis, A., Research Institute of Agricultural Machinery, Riga (Latvia)
Drying of carrots 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 moisture content and drying rate were calculated and presented. Using drying rate, the layer of carrot slices drying was simulated and receiving results compared with experimental data. Obtained measurement results are in high correlation with calculations. Presented mathematical model contains 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. Experimental and theoretical results showed that the carrot slices 3.5 cm thick layer was dry in 8 hours using a convective airflow with temperature 37 deg C.
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