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Infrared Radiation Drying of Mint Leaves

Author(s): B. S. Demirturk | H. Kocabiyik | B. S. Demirturk

Journal: Journal of Tekirdag Agricultural Faculty
ISSN 1302-7050

Volume: 5;
Issue: 3;
Start page: 239;
Date: 2008;
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Keywords: Drying curve | drying rate | specific energy consumption | color change

The effects of air velocity on the drying characteristics, drying time and drying rate of mint leaves were investigated at infrared drying. Specific energy consumption and color properties of dried mint leaves were examined. Experiments were conducted using four levels of air velocity (0.5, 1.0, 1.5 and 2.0 m/s) at 1080 W/m2 of infrared radiation density. The drying time ranged from 64 to 180 minutes for all the drying conditions. The drying rate increased with decreasing of air velocity. The specific energy consumption values varied between 37.04 and 106.58 MJ/kg-evaporated water for all the drying conditions. Colour parameters were found to be affected by process variables.
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