Mathematical modeling on hot air drying of thin layer apple pomace

The hot air convective drying characteristics of thin layer apple pomace were evaluated in a laboratory scale dryer. The drying experiments were carried out at 75, 85, 95 and 105 °C and at the air velocity of 1.20 ± 0.03 m/s. Different mathematical models were tested with the drying behavior of apple pomace in the dryer. The results indicated that the Logarithmic model can present better predictions for the moisture transfer than others; the drying process took place in two falling rate periods, the effective diffusivities in the second period were about six times greater than that in the first period; the general relationship of moisture ratio against drying duration in the thin-layer convective drying of apple pomace were found and can be used in design and operation of the convective drying, suggested by 0.9923 of square correlation coefficient and 0.00001 of chi square.

[1]  N. Sanjuán,et al.  Dehydration kinetics of red pepper (Capsicum annuum L var Jaranda) , 2003 .

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

[3]  S. Sokhansanj,et al.  Mass and dimensional changes of single canola kernels during drying , 1999 .

[4]  G. Fenton,et al.  Rapid dry weight determination of kiwifruit pomace and apple pomace using an infrared drying technique , 1998 .

[5]  Darko Velić,et al.  Influence of airflow velocity on kinetics of convection apple drying , 2004 .

[6]  D. M. Bruce.  Exposed-layer barley drying: Three models fitted to new data up to 150°C☆ , 1985 .

[7]  S. Alzamora,et al.  Air drying behaviour of apples as affected by blanching and glucose impregnation , 1998 .

[8]  A. Cihan,et al.  A liquid diffusion model for drying rough rice , 1993 .

[9]  H. Ramaswamy,et al.  EVALUATION AND MODELING OF TWO-STAGE OSMO-CONVECTIVE DRYING OF APPLE SLICES , 2002 .

[10]  T. Ohlsson,et al.  Microwave-assisted air dehydration of apple and mushroom , 1998 .

[11]  Robert H. Driscoll,et al.  The thin-layer drying characteristics of garlic slices , 1996 .

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

[13]  I. Dincer,et al.  Heat and moisture diffusion in slab products due to convective boundary condition , 2003 .

[14]  Dursun Pehlivan,et al.  Mathematical modelling of solar drying of apricots in thin layers , 2002 .

[15]  F. Vergara,et al.  Analysis of the Drying Processes of Osmotically Dehydrated Apple Using the Characteristic Curve Model , 1997 .

[16]  Kamil Kaygusuz,et al.  Drying behaviour of hazelnuts , 1998 .

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

[18]  İbrahim Doymaz,et al.  Modelling of olive cake thin-layer drying process , 2005 .

[19]  K. Saçılık,et al.  The thin layer drying characteristics of organic apple slices , 2006 .

[20]  Jun Wang,et al.  Effect of 60Co irradiation on drying characteristics of apple , 2003 .

[21]  Pedro Fito,et al.  DRYING KINETICS OF APPLE CYLINDERS UNDER COMBINED HOT AIR–MICROWAVE DEHYDRATION , 2004 .

[22]  S. M. Hendorson.  Grain Drying Theory (I) Temperature Effect on Drying Coefficient , 1961 .

[23]  Mehmet Pala,et al.  The thin-layer drying characteristics of corn , 2003 .

[24]  G. M. White,et al.  Fully-Exposed Drying of Popcorn , 1981 .

[25]  John Crank,et al.  The Mathematics Of Diffusion , 1956 .

[26]  T. Labuza,et al.  Effect of geometry on the effective moisture transfer diffusion coefficient , 1996 .

[27]  Jun Wang,et al.  Drying characteristics of irradiated apple slices , 2002 .

[28]  P. Panchariya,et al.  Thin-layer modelling of black tea drying process , 2002 .

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

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

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

[32]  Y. Onur Devres,et al.  The thin layer drying characteristics of hazelnuts during roasting , 1999 .

[33]  Antonio Mulet,et al.  HEAT AND MASS TRANSFER MODEL FOR POTATO DRYING , 1994 .

[34]  C. Ertekin,et al.  Mathematical modeling of thin layer solar drying of sultana grapes , 2001 .

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