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TWO‐PHASE MODELING AND THE QUALITY OF SOYBEAN SEEDS DRIED IN A COUNTER‐CURRENT MOVING BED DRIER
Author(s) -
LACERDA A.F.,
LISBOA M.H.,
OLIVEIRA M.S.,
BARROZO M.A.S.
Publication year - 2004
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.2004.00382.x
Subject(s) - countercurrent exchange , work (physics) , mass transfer , humidity , mechanics , water content , relative humidity , air temperature , air velocity , process (computing) , germination , flow (mathematics) , environmental science , chemistry , thermodynamics , meteorology , horticulture , physics , computer science , geotechnical engineering , engineering , biology , operating system
The purpose of the present work is to study the simultaneous heat and mass transfer between air and soybean seeds in a countercurrent moving bed dryer, based on the application of a two‐phase model to the drying process. The numerical solution of the model is obtained by using a computational code based on backwards differential formulae. The experimental data of air humidity and temperature and of seed moisture content and temperature at the dryer outlet are compared to the simulated values, showing a good agreement. This work also analyzes the effect of the main process variables (drying air temperature, air relative humidity, air velocity and solids flow rate) on the soybean seeds quality during drying. Empirical equations fitted to the experimental data are proposed for predicting the soybean seed quality (germination, vigor and fissures) as a function of the investigated variables.