A continuous high voltage electrostatic field system for thawing food materials

https://doi.org/10.4081/jae.2021.1163

Authors

  • Ehsan Movahedi Department of Biosystems Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of.
  • Morteza Sadeghi | sadeghimor@iut.ac.ir Department of Biosystems Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of. https://orcid.org/0000-0002-0547-9650
  • Amin Allah Masoumi Department of Biosystems Engineering, College of Agriculture, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of.
  • Naser Hamdami Department of Food Science and Technology, College of Agriculture, Isfahan University of Technology, Isfahan, Iran, Islamic Republic of.

Abstract

A laboratory continuous high voltage electrostatic field thawing system was designed and constructed in accordance with standards for food machinery. A corona discharge in wire-plate electrodes was considered for the system and a stainless-steel sheet was utilized as conveyor belt. A corona flow was created by using high voltage of 15, 20, and 25 kV and electrode gaps of 6, 8, and 10 cm. To evaluate the system, frozen tylose MH4000 gel with a moisture content of 77% w.b. as a meat analog was thawed from –10 to 0°C. The thawing duration, which was mostly aimed at increasing the temperature of a control sample (no electrostatic field), considerably decreased when the gel was thawed in the presence of high voltage. High voltage and electrode gap showed a significant effect on both thawing duration and specific energy consumption (P˂0.0001). The thawing duration decreased significantly by decreasing the electrode gap and increasing the applied voltage. In terms of energy consumption, the best condition (minimum specific energy consumption of 10.33 kJ kg–1) was obtained for 15 kV, and an electrode gap of 10 cm.

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Published
2021-05-10
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Original Articles
Keywords:
Continuous thawing, corona flow, electrostatics, Tylose gel, wire-plate arrangement.
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How to Cite
Movahedi, E., Sadeghi, M., Masoumi, A. A., & Hamdami, N. (2021). A continuous high voltage electrostatic field system for thawing food materials. Journal of Agricultural Engineering, 52(2). https://doi.org/10.4081/jae.2021.1163