Performance analysis of drying of carrot slices in a semi-industrial continuous band dryer
2009
Aghbashlo, Mortaza | Kianmehr, Mohammad Hossien | Arabhosseini, Akbar
This paper presents the energy and exergy analysis of drying process in a semi-industrial continuous band dryer. Experiments were performed on thin layer drying of carrot slices with thickness of 5mm, at air temperatures of 50, 60 and 70°C, drying air mass flow rates of 0.61, 1.22 and 1.83kg/s and feeding rates of 2.98x10⁻⁴, 3.48x10⁻⁴ and 4.16x10⁻⁴ kg/s. The effects of drying variables were evaluated on weight loss of dried products, energy utilization, energy utilization ratio, exergy loss and exergy efficiency. An amount of 250g of fresh material was used on each band for drying experiments and the weight loss of dried samples were found to be in the range of 51.6-84.4% of initial weight. The energy utilization and energy utilization ratio varied between 3.78-25.57kJ/s and 0.1554-0.3752, respectively. The exergy loss and exergy efficiency were found to be in the range of 0.6677-14.1577kJ/s and 0.5527-0.9329, respectively.
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