Electrohydrodynamic drying of apple slices: Energy and quality aspects

被引:93
|
作者
Martynenko, Alex [1 ]
Zheng, Weiwei [1 ]
机构
[1] Dalhousie Univ, Fac Agr, Dept Engn, Truro, NS B2N 5E3, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
EHD; Convective drying; Apple; Color; Energy efficiency; HIGH-ELECTRIC-FIELD; NEEDLE ELECTRODE; COMPUTER-VISION; WIRE ELECTRODE; SEA-CUCUMBER; EHD; MICROWAVE; KINETICS; PRETREATMENT; DEHYDRATION;
D O I
10.1016/j.jfoodeng.2015.07.043
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
In this study, EHD was applied for apple slices drying through a multiple needle-to-plate electrode with a fixed 25 mm gap, using different combinations of voltage and air velocity at room temperature. Effects of EHD on drying kinetics, color degradation, and energy consumption were studied. High voltage significantly increased drying rate by 1.5-4 times at high (5 m/s) and low (1 m/s) air velocity, respectively. Combined EHD-convective drying was more efficient for moisture removal than sole EHD drying. The most significant effect of EHD on drying rate was observed at the highest voltage and low air velocity. Effect of EHD on color was insignificant at voltages below 10 kV, but higher voltage intensified progressively color degradation. Energy, used in EHD drying, was negligibly small (1-2%) as compared to the total energy consumption of AC/DC converter. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:215 / 222
页数:8
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