Comparison of predictions from neural networks (static and dynamic) and mathematical models in drying of thyme leaves (Part I).

Thin layer drying characteristics of thyme leaves (Anethum sowa L.) under fluidized (air velocity 2.8 m/s), semi fluidized (air velocity 2.1 m/s) and fixed bed (air velocity 1.2 m/s) drying conditions were studied at various air temperatures (40, 50, 60 and 70°C). In this paper, thin-layer drying kinetics as well as analysis and multilayer feed-forward (static) and recurrent (dynamic) neural networks were employed to evaluate dynamic drying behavior of thyme leaves. The best mathematical representation provided by the Page model (R 2 =0.9979, SSE= 0.0026 and RMSE=0.0012) was used for predicting the behavior of the thin layer drying in thyme leaves. Prediction of drying kinetics was achieved with correlation coefficients (R 2 ) greater than 0.9994 and 0.9986 and MSE lower than 0.0015 and 0.0016 using static and recurrent ANNs, receptively.

[1]  R. Singh,et al.  USE OF VARIABLE EQUILIBRIUM MOISTURE CONTENT IN MODELING RICE DRYING. , 1978 .

[2]  J. J. Bimbenet,et al.  MODELLING OF DRYING IN ORDER TO IMPROVE PROCESSING QUALITY OF MAIZE , 1991 .

[3]  Somchart Soponronnarit,et al.  Cross-Flow Fluidized Bed Paddy Dryer: Prototype and Commercialization , 1995 .

[4]  C. Bonazzil,et al.  INFLUENCE OF DRYING CONDITIONS ON THE PROCESSING QUALITY OF ROUGH RICE , 1997 .

[5]  Anan Pongtornkulpanich,et al.  DRYING CHARACTERISTICS OF CORN IN FLUIDIZED BED DRYER , 1997 .

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

[7]  Adnan Midilli,et al.  Single layer drying behaviour of potato slices in a convective cyclone dryer and mathematical modeling , 2003 .

[8]  M. Izadifar,et al.  SIMULATION OF A CROSS-FLOW CONTINUOUS FLUIDIZED BED DRYER FOR PADDY RICE , 2003 .

[9]  Can Ertekin,et al.  Drying of eggplant and selection of a suitable thin layer drying model , 2004 .

[10]  R. C. Verma,et al.  Thin-layer infrared radiation drying of onion slices , 2005 .

[11]  I. Doymaz,et al.  Influence of pretreatment solution on the drying of sour cherry , 2007 .

[12]  Xiaosong Hu,et al.  Mathematical modeling on hot air drying of thin layer apple pomace , 2007 .

[13]  Y. Tipsuwan,et al.  Moisture content and water activity prediction of semi-finished cassava crackers from drying process with artificial neural network , 2008 .

[14]  Adnan Topuz,et al.  Predicting moisture content of agricultural products using artificial neural networks , 2010, Adv. Eng. Softw..

[15]  Saeid Minaei,et al.  Drying of Pomegranate Arils: Comparison of Predictions from Mathematical Models and Neural Networks , 2010 .

[16]  S. P. Sonawane,et al.  Kinetics of potato drying using fluidized bed dryer , 2012, Journal of Food Science and Technology.

[17]  Ali Akbar Sabziparvar,et al.  Modeling moisture diffusivity, activation energy and specific energy consumption of squash seeds in a semi fluidized and fluidized bed drying , 2011, Journal of Food Science and Technology.

[18]  I. Doymaz,et al.  Drying characteristics of sweet cherry , 2011 .

[19]  Cengiz Yildiz,et al.  Original paper: The prediction of seedy grape drying rate using a neural network method , 2011 .

[20]  A. Nikbakht,et al.  Evaluation of Thin-Layer Drying Models for Simulation of Drying Kinetics of Quercus (Quercus persica and Quercus libani) , 2011 .

[21]  Mortaza Aghbashlo,et al.  Prediction of carrot cubes drying kinetics during fluidized bed drying by artificial neural network , 2011, Journal of food science and technology.

[22]  Mohammad Hadi Khoshtaghaza,et al.  Designing and optimizing a back propagation neural network to model a thin-layer drying process , 2011 .

[23]  S. Minaei,et al.  Effective parameters on drying of Hypericum perforatum L. leaves , 2011 .

[24]  R. Chayjan,et al.  Modelling moisture diffusivity of pomegranate seed cultivars under fixed, semi fluidized and fluidized bed using mathematical and neural network methods. , 2012, Acta scientiarum polonorum. Technologia alimentaria.

[25]  R. Chayjan,et al.  Modeling of some pistachio drying characteristics in fix, semi fluid and fluid bed dryer , 2012 .

[26]  S. Minaei,et al.  Effective Moisture Diffusivity, Activation Energy and Energy Consumption in Thin-layer Drying of Jujube (Zizyphus jujube Mill) , 2012 .