Some Aspects of the Modelling of Thin-Layer Drying of Sawdust

Andrzej Bryś, Agnieszka Kaleta, Krzysztof Górnicki, Szymon Głowacki, Weronika Tulej, Joanna Bryś and Piotr Wichowski
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Andrzej Bryś: Institute of Mechanical Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 164, 02-787 Warszawa, Poland
Agnieszka Kaleta: Institute of Mechanical Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 164, 02-787 Warszawa, Poland
Krzysztof Górnicki: Institute of Mechanical Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 164, 02-787 Warszawa, Poland
Szymon Głowacki: Institute of Mechanical Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 164, 02-787 Warszawa, Poland
Weronika Tulej: Institute of Mechanical Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 164, 02-787 Warszawa, Poland
Joanna Bryś: Institute of Food Science, Warsaw University of Life Sciences, ul. Nowoursynowska 159c, 02-787 Warszawa, Poland
Piotr Wichowski: Institute of Environmental Engineering, Warsaw University of Life Sciences, ul. Nowoursynowska 159, 02-776 Warszawa, Poland

Energies, 2021, vol. 14, issue 3, 1-16

Abstract: Drying of spruce, beech, willow, and alder sawdust was examined in a laboratory type dryer. The effect of drying air temperature T (25, 60, and 80 °C) and airflow velocity v (0.01, 0.15, and 1.5 m/s) was investigated. The obtained results demonstrated that drying air temperature and airflow velocity have impacts on the drying of sawdust. The experimental dehydration data of sawdust obtained were fitted to theoretical, semi-theoretical, and empirical thin-layer models. The accuracies of the models were estimated using the correlation coefficient ( R ), root mean square error (RMSE), and reduced chi-square (χ 2 ). All models except the theoretical model of a sphere described the drying characteristics of sawdust satisfactorily. The effect of T and v on the parameters (constants and coefficients) of the drying models were determined. The effect, by the proposed equations, was also described. This work combines aspects of mechanical engineering and modelling of the drying process.

Keywords: sawdust; drying; dehydration; modelling; mechanical engineering (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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