Volume 8
Issue 2
Agricultural Engineering
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume8/issue2/abs-29.html
EFFECTIVE WATER DIFFUSION COEFFICIENT IN FABA BEAN SEEDS DURING DRYING.PART I. DETERMINATION OF VALUES
Ireneusz Bia這brzewski, Ryszard Myhan, Romuald Cydzik
Department of Agricultural Process Engineering,
University of Warmia and Mazury in Olsztyn, Poland
ABSTRACT
The effective water diffusion coefficient was determined in faba bean seeds during drying. Faba bean seeds with an initial moisture content of 0.240 kg/kg were dried under natural convection conditions at 15, 20, 25, 30 and 35°C. The results obtained in the study show that in the process of convective drying of faba bean seeds the effective water diffusion coefficient is related to moisture content in a temperature range [15, 35]°C, and moisture content range. It was also found that the effective water diffusion coefficient is significantly affected by temperature in a range [15, 35]°C, but not in a range [20, 30]°C. The exponential form of the Arrhenius equation describes, with sufficient accuracy, the effective water diffusion coefficient in faba bean seeds during drying, as a function of material moisture content and temperature.
Key words: faba bean, drying, effective water diffusion coefficient, mathematical models.
Ireneusz Bia這brzewski
Department of Agricultural Process Engineering,
University of Warmia and Mazury in Olsztyn, Poland
14 Heweliusza Street, 10-718 Olsztyn, Poland
email: irekb@uwm.edu.pl
Ryszard Myhan
Department of Agricultural Process Engineering,
University of Warmia and Mazury in Olsztyn, Poland
14 Heweliusza Street, 10-718 Olsztyn, Poland
email: ryszard.myhan@uwm.edu.pl
Romuald Cydzik
Department of Agricultural Process Engineering,
University of Warmia and Mazury in Olsztyn, Poland
14 Heweliusza Street, 10-718 Olsztyn, Poland
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