Drying behaviour of brined onion slices

Abstract A batch-type experimental dryer with an online weighing mechanism was developed for determining the thin-layer drying behaviour of onion. Thin-layer drying rates of brined onion slices were experimentally determined at four levels of drying air temperature (range of 50–80°C), four levels of air flow velocity (range of 0.25–1.00 m/s) and three levels of air relative humidity (range of 10–20%). The experimental data obtained were fitted into an Arrhenius-type model and power model using non-linear regression analysis. The Arrhenius-type model was found to be more suitable for predicting drying rate constants.

[1]  Robert J. Gustafson,et al.  Thin-Layer Drying Rates of Sunflower Seed , 1984 .

[2]  J. L. Parry,et al.  Mathematical modelling and computer simulation of heat and mass transfer in agricultural grain drying: A review , 1985 .

[3]  R. S. Rapusas,et al.  Bulk density and resistance to airflow of sliced onions , 1995 .

[4]  R. C. Brook,et al.  DYNAMIC PROGRAMMING FOR PROCESS OPTIMIZATION 1. AN ALGORITHM FOR DESIGN OF MULTI‐STAGE GRAIN DRYERS , 1978 .

[5]  R. Blazquez,et al.  MODELING AND OPTIMIZATION OF A DRYER , 1986 .

[6]  D. Marinos-Kouris,et al.  THE DESIGN AND OPTIMIZATION OF AN INDUSTRIAL DRYER FOR SULTANA RAISINS , 1991 .

[7]  G. Lal,et al.  Preservation Of Fruits And Vegetables , 1960 .

[8]  O. Ajibola.  Thin-layer drying of melon seed , 1989 .

[9]  Huizhen Li,et al.  Thin-Layer Drying of Yellow Dent Corn , 1984 .

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

[11]  J. R. Sharp.  A review of low temperature drying simulation models , 1982 .

[12]  Chris T. Kiranoudis,et al.  DRYING KINETICS OF ONION AND GREEN PEPPER , 1992 .

[13]  R. S. Rapusas,et al.  The Thin-Layer Drying Characterstics of White Onion Slices , 1995 .

[14]  W. V. Hukill,et al.  Drying Rate of Fully Exposed Grain Kernels , 1960 .

[15]  D. M. Bruce,et al.  Apparatus for determining mass transfer coefficients at high temperatures for exposed particulate crops, with initial results for wheat and hops , 1983 .

[16]  Lalit R. Verma,et al.  Generalized Single-Layer Rice Drying Models , 1986 .

[17]  Chris T. Kiranoudis,et al.  Equilibrium moisture content and heat of desorption of some vegetables , 1993 .