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Paper Information

Journal:   JOURNAL OF AGRICULTURAL SCIENCE (UNIVERSITY OF TABRIZ)   2007 , Volume 17 , Number 2; Page(s) 199 To 208.
 
Paper: 

THE THIN LAYER DRYING KINETICS MODELING OF WHEAT (TAJAN LINE)

 
 
Author(s):  RAFIEE SH.*
 
* DEPARTMENT OF AGRICULTURAL MACHINERY ENGINEERING, AGRICULTURAL BIOSYSTEM ENGINEERING, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

Artificial drying is one of the most common methods of preservation of agricultural products. Drying conditions can affect physical and mechanical properties of grain. The drying process must be designed and controlled to minimize drying damage. In this study, the thin layer drying kinetics behavior of wheat (tajan) with initial moisture content of 26% (d.b.) in a convective type experimental dryer was investigated and mathematical modeling using four replications of thin layer drying kinetics models from the literature was performed. Drying experiments were carried out at inlet temperatures of 35, 45, 50, 60 and 70°C. Drying time to reach 10.5 % moisture content from the initial moisture content at various drying air temperatures were found to be between 62 and 246 min. Six different thin layer mathematical drying kinetics models were compared according to their correlation coefficient to estimate drying kinetics curves. The effects of drying air temperature on the model constants and coefficients were predicted by regression models. According to the results, the approximation of diffusion model represents the curves of the wheat drying kinetics (r=0.932). Non-linear regression method was used to simulate the drying kinetics as a function of the temperature.

 
Keyword(s): DRYING KINETICS, MODELING, THIN LAYER, WHEAT
 
References: 
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