Mathematical modelling of thin-layer drying of carrot.

This paper presents a new mathematical model for thin-layer drying process, which was verified with experimental data. A laboratory scale static-tray dryer was used to obtain the experimental data. Carrot cubes were used for drying experiments. Experiments were performed at air temperatures of 50, 60 and 70°C at constant air velocity of 1 m s -1 . Fifteen different mathematical drying models and the new model were compared based on the correlation coefficient, root mean error and reduced chi-square between the experimental and predicted moisture ratios. Consequently, of all the drying models, the proposed model was selected as the best mathematical model for describing the drying kinetics of carrot cubes. Constants related to the new model are reported and correlated with air temperature using Arrhenius equation.

[1]  V. Demir,et al.  Mathematical modelling of convection drying of green table olives , 2007 .

[2]  S. M. Henderson,et al.  Progress in Developing the Thin Layer Drying Equation , 1974 .

[3]  G. M. White,et al.  Relative Humidity Effect on the High-Temperature Drying of Shelled Corn , 1973 .

[4]  L. Diamante,et al.  Mathematical modelling of hot air drying of sweet potato slices , 2007 .

[5]  A. Midilli,et al.  A NEW MODEL FOR SINGLE-LAYER DRYING , 2002 .

[6]  V. Karathanos.  Determination of water content of dried fruits by drying kinetics , 1999 .

[7]  W. K. Lewis.  The Rate of Drying of Solid Materials. , 1921 .

[8]  Javad Khazaei,et al.  Modeling of thin-layer drying kinetics of sesame seeds : mathematical and neural networks modeling , 2007 .

[9]  Lope G. Tabil,et al.  Thin-layer drying characteristics and modeling of pistachio nuts , 2007 .

[10]  G. E. Page,et al.  FACTORS INFLUENCING THE MAXIMUM RATES OF AIR DRYING SHELLED CORN IN THIN LAYERS. , 1949 .

[11]  Koksal Erenturk,et al.  Comparison of genetic algorithm and neural network approaches for the drying process of carrot , 2007 .

[12]  J. Khazaei,et al.  Application of Superposition Technique for Modeling Drying Behavior of Avishan (Zataria multiflora) Leaves , 2008 .

[13]  K. Górnicki,et al.  Drying curve modelling of blanched carrot cubes under natural convection condition , 2007 .

[14]  Nelson Bracho,et al.  Weibull distribution for modeling air drying of coroba slices , 2008 .

[15]  İbrahim Doymaz,et al.  Convective air drying characteristics of thin layer carrots , 2004 .

[16]  Ray A. Bucklin,et al.  Effects of Drying Air Parameters on Rice Drying Models , 1985 .

[17]  Yahya I. Sharaf-Eldeen,et al.  A Model for Ear Corn Drying , 1980 .

[18]  İbrahim Doymaz,et al.  The kinetics of forced convective air-drying of pumpkin slices , 2007 .

[19]  Mortaza Aghbashlo,et al.  Influence of drying conditions on the effective moisture diffusivity, energy of activation and energy consumption during the thin-layer drying of berberis fruit (Berberidaceae) , 2008 .

[20]  G. M. White,et al.  Drying Soybeans With Heated Air , 1973 .

[21]  Dursun Pehlivan,et al.  Modelling of drying kinetics of single apricot , 2003 .