Design optimization using dielectric slab for efficient microwave heating

In this paper, usage of a dielectric slab on the top and bottom sides, on the top side, and on the bottomside of a clay sample was presented as a means of improving heating efficiency in multimode applicator. In order toaccomplish the optimization procedure, we used four different dielectric slab types having different thickness values. Thesimulated results show that by using additional dielectric slab it is possible to increase the electric field intensity insidethe applicator and obtain higher power absorption rates within the sample and high-efficiency designs.

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[1] Metaxas AC, Meredith RJ. Industrial Microwave Heating. London, UK: IET, 1983.
[2] Meredith RG. Engineers’ Handbook of Industrial Microwave Heating. London, UK: Institution of Electrical Engineers, 1998.
[3] Mehdizadeh M. Microwave/RF Applicators and Probes. 2nd ed. Norwich, NY, USA: William Andrew, 2015.
[4] Chow TV, Chan T, Reader HC. Understanding Microwave Heating Cavities. London, UK: Artech House, 2000.
[5] Metaxas AC. Radio frequency and microwave heating: A perspective for the millennium. Power Engineering Journal 2000; 14: 51-60.
[6] Osepchuk JM. Microwave power applications. IEEE Microwave Theory and Techniques Society 2002; 50: 975-985.
[7] Rajpurohit DS, Chhibber R. Design optimization of two input multimode applicator for efficient microwave heating. International Journal of Advances in Microwave Technology (IJAMT) 2016; 1: 68-73.
[8] Ali IA. Effect of load on the heating efficiency and temperature uniformity in multimode cavity applicators. Journal of Microwave Power and Electromagnetic Energy 2016; 50: 123-137.
[9] Brodie G. The influence of load geometry on temperature distribution during microwave heating. Transactions of the ASABE (American Society of Agricultural and Biological Engineers) 2008; 51: 1401-1413.
[10] Cha-um W, Rattanadecho P, Pakdee W. Experimental analysis of microwave heating of dielectric materials using a rectangular wave guide (MODE: TE10) (Case study: Water layer and saturated porous medium). Experimental Thermal and Fluid Science 2009; 33: 472-481.
[11] Cabrera JM, Morcillo AD, Pedreno Molina JL, Sanchez Hernandez D. A new method for load matching in multimode microwave heating applicators based on the use of dielectric layer superposition. Microwave Opt Technol Lett 2004; 40: 318-322.
[12] Cabrera MJ, Escalante J, Morcillo AD, Gonzalez AM, Hernandez DS. Load matching in multimode microwave heating applicators based on the use of dielectric layer with commercial materials. Microwave Opt Technol Lett 2004; 41: 414-417.
[13] Tortajada DE, Cabrera JM, Morcillo AD. Load matching in microwave heating applicators by means of geneticalgorithm optimization of dielectric multilayer structures. Microwave Opt Technol Lett 2005; 47: 426-430.
[14] Requena Perez ME, Pedreno-Molina JL, Pinzolas Prado M, Monzo Cabrera J, Diaz Morcillo A, Sanchez Hernandez D. Load matching in multimode microwave-heating applicators by load location optimization. In: Proceedings of the 34th European Microwave Conference, Amsterdam: 2004. pp. 1549-1552.
[15] Requena Perez ME, Pedreno Molina JL, Monzo Cabrera J, Morcillo AD. Multimode cavity efficiency optimization by optimum load location experimental approach. IEEE Transactions on Microwave Theory and Techniques 2005; 53: 2114-2120.
[16] Pedreno Molina JL, Cabrera JM, Pinzolas M. A new procedure for power efficiency optimization in microwave ovens based on thermographic measurements and load location search. International Communications in Heat and Mass Transfer 2007; 34: 564-569.