کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
762112 | 896666 | 2007 | 11 صفحه PDF | دانلود رایگان |
This article represents the results of the variation in density and shrinkage of apricots during its osmotic dehydration. Shrinkage was investigated by means of dimensionless volume, diameter and length. Various osmotic agents such as sucrose, glucose, fructose, maltodextrin and sorbitol were used. It was found that the shrinkage of apricots could be well correlated with the moisture content of the sample during osmotic dehydration. The relationship between dimensionless parameters and moisture content was investigated by using eight non-linear models for each osmotic agent. It was find that the following proposed model can be confidently use for explaining the effect of shrinkage during osmotic dehydration of apricots.V/V0,D/D0,L/L0,ρ/ρ0=a+b·exp(cX)+d·exp(e·Xf)V/V0,D/D0,L/L0,ρ/ρ0=a+b·exp(cX)+d·exp(e·Xf)In addition, the osmotic dehydration kinetics of apricots with and without shrinkage was studied. The effective diffusivities calculated from the diffusional model with and without shrinkage varied from 10.342 × 10−9 m2/s to 5.139 × 10−9 and from 1.755 × 10−10 and 0.767 × 10−10 m2/s, respectively.
Journal: Energy Conversion and Management - Volume 48, Issue 10, October 2007, Pages 2611–2621