شماره ركورد كنفرانس :
5048
عنوان مقاله :
Propose suitable model for modeling of moisture ratio and estimation of effective moisture diffusivity of onion slices by hot air dryer
Author/Authors :
Sedigheh ،Abbasi Chemical Engineering Dept - Faculty of Engineering - Ferdowsi University of Mashhad , Mahmood ،Mousavi Chemical Engineering Dept - Faculty of Engineering - Ferdowsi University of Mashhad , Mohebbat ،Mohebbi Food Science & Technology Dept - College of Agriculture - Ferdowsi University of Mashhad
كليدواژه :
moisture ratio , Onion , Drying , Modeling , Moisture Diffusivity , Drying rate
عنوان كنفرانس :
ششمين كنگره بين المللي مهندسي شيمي
چكيده لاتين :
Onion slices were dried under different processing conditions by hot air dryer. Slice thickness, air velocity were
constant and inlet air temperature, drying time were varied to study the drying behavior. Thin layer drying of onion
slices was carried out at air temperatures of 60, 70, 80 and 90 °C and air velocity of 1.5 m s . The drying occurred in
the falling rate of drying period. 13 available moisture ratio models were fitted to the drying data. The model proposed
in this study had a higher squared correlation coefficient ( R2 ), and low sum of square error (SSE ) and thus predicted
drying behaviour of the onion slices more accurately. The average effective moisture diffusivity of onion slices ranged
between 0.125821´10-10 m2 s-1 and 0.788957´10-10 m2 s -1 . The values for eff D increased with a increase in air
temperature and decrease in moisture content under all drying conditions.
