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Experimental and mathematical investigations of convective solar drying of four varieties of olive leaves

Paper ID Volume ID Publish Year Pages File Format Full-Text
19411 43063 2008 9 PDF Available
Title
Experimental and mathematical investigations of convective solar drying of four varieties of olive leaves
Abstract

The aim of this work is to study the drying kinetics of four varieties of Tunisian olive leaves (Chemlali, Chemchali, Zarrazi and Chetoui) by using an indirect forced convective solar dryer consisting of a solar collector, an auxiliary heater, a circulation fan and a drying cabinet used for drying experiments. Experiments are conducted at three temperatures (40, 50 and 60 °C), ambient relative humidity (29–32%) and at a drying air flow rate of 0.0556 m3/s. Three models available in the literature were used to describe experimental kinetics. The experimental drying curves show only the falling rate period. Air temperature has a significant effect on drying kinetics. The statistical parameters (correlation coefficients and standard errors) show that the Page model could be used to determine the curve drying equations from the experimental drying curves. The characteristic drying curves of olive leaves are determined empirically by using the corresponding curve drying equations. Apparent moisture diffusivities of olive leaves were determined from the analytical solution of Fick's equation. Values vary from 2.95 × 10−10 to 3.60 × 10−9 m2/s. They depend on the olive leaves variety and on temperature.

Keywords
Olive leaf; Solar drying; Kinetics; Air temperature; Apparent diffusivity; Activation energy
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Experimental and mathematical investigations of convective solar drying of four varieties of olive leaves
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Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 86, Issue 3, September 2008, Pages 176–184
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us