Effect of needle number on drying rate of kiwi fruit in EHD drying process - Agricultural Sciences

AS > Vol.4 No.1, January 2013

Agricultural Sciences

Volume 4, Issue 1 (January 2013)

ISSN Print: 2156-8553 ISSN Online: 2156-8561

Google-based Impact Factor: 1.01 Citations h5-index & Ranking

Effect of needle number on drying rate of kiwi fruit in EHD drying process ()

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DOI: 10.4236/as.2013.41001 4,698 Downloads 7,864 Views Citations

Author(s)

Mohammad Jafar Dalvand, Seyed Saeid Mohtasebi, Shahin Rafiee

Affiliation(s)

Department of Agricultural Machinery, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran.

ABSTRACT

Electrohydrodynamic (EHD) drying is a novel method of non-thermal processing. In this drying method, drying can be carried out using either AC or DC high voltages. The thermodynamic considerations regarding the lowering of temperature under EHD drying include rapid rates of evaporation and exothermic interaction of the electric field with a dielectric material. Multi-point and plate electrode systems are efficient in accelerating drying of agricultural materials. The electrode produces corona wind, which resembles a round jet, impinges and removes moisture from the surface. The enhancement of drying rate by corona discharge from needle electrodes has been experimentally evaluated in this study. Effects of three different categories, one needle, nine needles and seventeen needles on drying rate of kiwi fruit were studied, moreover in each category, Experiments were carried out using DC voltage levels of 6, 10.5 and 15 kV and field intensities 4.5 kV/cm. Results showed that the effect of needle number on drying rate was significant and drying rate of kiwi fruit reduced with increasing in needle numbers.

KEYWORDS

Drying Rate; Electrode; Field Strength; High Voltage; Needle Number

Share and Cite:

Dalvand, M. , Mohtasebi, S. and Rafiee, S. (2013) Effect of needle number on drying rate of kiwi fruit in EHD drying process. Agricultural Sciences, 4, 1-5. doi: 10.4236/as.2013.41001.

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