The Effect of Electric Field Distributions on Grains and Insect for Dielectric Heating Applications

Authors: S. Santalunai, T. Thosdeekoraphat, C. Thongsopa

Abstract:

This paper presents the effect of electric field distribution which is an electric field intensity analysis. Consideration of the dielectric heating of grains and insects, the rice and rice weevils are utilized for dielectric heating analysis. Furthermore, this analysis compares the effect of electric field distribution in rice and rice weevil. In this simulation, two copper plates are used to generate the electric field for dielectric heating system and put the rice materials between the copper plates. The simulation is classified in two cases, which are case I one rice weevil is placed in the rice and case II two rice weevils are placed at different position in the rice. Moreover, the probes are located in various different positions on plate. The power feeding on this plate is optimized by using CST EM studio program of 1000 watt electrical power at 39 MHz resonance frequency. The results of two cases are indicated that the most electric field distribution and intensity are occurred on the rice and rice weevils at the near point of the probes. Moreover, the heat is directed to the rice weevils more than the rice. When the temperature of rice and rice weevils are calculated and compared, the rice weevils has the temperature more than rice is about 41.62 Celsius degrees. These results can be applied for the dielectric heating applications to eliminate insect.

Keywords: Copper plates, Electric field distribution, Dielectric heating.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1093906

References:

[1] H. Sarnago, O. Lucia, A. Mediano, and JM. Burdio, "Class-D/DE Dual- Mode-Operation Resonant Converter for Improved-Efficiency Domestic Induction Heating System,” IEEE Transactions on Power Electronics, vol. 28,pp. 1274-1285. 2013.
[2] M. Lichan, K.W.E. Cheng, and W.C. Ka, "Systematic Approach to High-Power and Energy-Efficient Industrial Induction Cooker System: Circuit Design, Control Strategy, and Prototype Evaluation,” IEEE Transactions on Power Electronics, vol. 26,pp. 3754 - 3765.
[3] N.A. Ahmed, "High-Frequency Soft-Switching AC Conversion Circuit With Dual-Mode PWM/PDM Control Strategy for High-Power IH Applications,” IEEE Transactions on Industrial Electronics, vol. 58, pp. 1440 - 1448. 2011.
[4] H. Oka, S. Uchidate, N. Sekino, Y. Namizaki, K. Kubota, H. Osada, F.P. Dawson, and J.D. Lavers, "Electromagnetic Wave Absorption Characteristics of Half Carbonized Powder-Type Magnetic Wood,” IEEE Transactions on Magnetics, vol. 47 pp. 3078-3070. 2011.
[5] K. Myungsik, and K. Kwangsoo, "Development of a compact cylindrical reaction cavity for a microwave dielectric heating system,”Review of Scientific Instruments, vol. 83 pp.1. 2012.
[6] C. Li, J. Wang, and J. Zhu, "Experiment and Theoretical Study on Thermal Performance of Honeycomb Ceramic Regenerative Heat Exchanger,” Power and Energy Engineering Conference (APPEEC) Asia-Pacific, pp. 1-6. 2010.
[7] M. Granada, and W. Ferney, "Experimental prototype for endogenous drying wood by radio frequency (RF),”. Alternative Energies and Energy Quality (SIFAE), International Symposium on IEEE, pp. 1-8. 2012.
[8] A. Bayrashev, and B. Ziaie, "Silicon wafer bonding with an insulator interlayer using RF dielectric heating, Micro Electro Mechanical Systems,” The Fifteenth, International Conference on IEEE, vol. 419- 422. 2002.
[9] G. Jeffrey, 2012. "Characterization of Thermosetting Polymers.” How to Get More Out of Your Rheometer-Part Three
[10] S.O. Nelson, 2006. "Agricultural applications of dielectric measurements,” IEEE Transactions on Dielectrics and Electrical Insulation, vol. 13, pp. 688-702. 2006.
[11] S. O. Nelson, "Dielectric properties of agricultural products Measurements and Applications,” IEEE Trans. Elect. Insul, vol. 26, pp. 845-869. 1991.
[12] V. Komarov, "Dielectric and Thermal Properties of Materials at Microwave Frequencies,” Handbook, Artech House. 2012.
[13] S. Wang, J. Tang, J.A. Johnson, E. Mitcham, J.D. Hansen, G. Hallman, S.R. Drake, and Y. Wang, "Dielectric Properties of Fruits and Insect Pests as related to Radio Frequency and Microwave Treatments,” Biosystems Engineering, vol. 85, pp. 201-212. 2003.