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The kinetics of celery slice air drying have been measured in a vacuum chamber. Experiments were carried out at various temperatures under conditions of low pressure. The drying rate versus product water content curves showed no constant drying rate period in all cases. A marked initial warming-up period, and a relatively long period of slightly decreasing material temperature followed by a final...
This work aimed at studying the effects of temperature and air flow rate on heat transfer coefficient during the forced air drying of onion slices. The weight losses in 5 mm thick onion slices were determined during the drying at 40, 45, 50, 55, 60 and 65°C and 0.7, 0.9 and 1.1 m/s air flow rates. Each experiment lasted 2 h. The heat transfer coefficient was calculated based on the empirical results...
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