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Drying behavior of carrot slices were studied at 200, 300, 400 and 500 W for constant sample thickness (5mm) in a microwave dryer. By increasing the microwave output powers (200-500 W), the drying time decreased from 17.5 to 9.5 min. The drying process took place in the falling rate period. Six mathematical models for describing the thinlayer drying behavior of carrot slices were investigated. The models were compared based on their coefficient of determination (R2), root mean square error (RMSE) and reduced chi-square (χ2) values between experimental and predicted moisture ratios. The results show that the Midilli model is the most appropriate model for drying behaviour of thin layer carrot slices. Moisture transfer from carrot slices was described by applying the Fick’s diffusion model, and effective moisture diffusion coefficients were calculated. A third order polynomial relationship was found to correlate the effective moisture diffusivity (D eff ) with moisture content. The effective moisture diffusivity increased with decrease in moisture content of carrot slices. Average effective moisture diffusivity increased from 6.33×10 -9 to 1.14×10 -8 m 2 /s with increasing the microwave power.
Dr. Isa Hazbavi. 2013. "Using of Semi-Empirical Models and Fickas Second Low for Mathematical Modeling of Mass Transfer in Thin Layer Drying of Carrot Slice". Global Journal of Science Frontier Research - C: Biological Science GJSFR-C Volume 13 (GJSFR Volume 13 Issue C4).
Crossref Journal DOI 10.17406/GJSFR
Print ISSN 0975-5896
e-ISSN 2249-4626
v1.2
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Total Score: 132
Country: Iran
Subject: Global Journal of Science Frontier Research
Authors: Dr. Isa Hazbavi, Seyed Hashem Samadi, Hamid khafajeh (PhD/Dr. count: 1)
View Count (all-time): 252
Total Views (Real + Logic): 1763
Total Downloads (simulated): 117
Publish Date: 2013 02, Mon
Monthly Totals (Real + Logic):
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