Abstract
In this chapter a comprehensive study of the phenomena involved in the dehydration process of wet porous solids through the use of electromagnetic waves with the aim to improve process strategies has been presented. Electromagnetic waves penetrate into the material and heat it volumetrically, due to the interaction of the electric field with water molecules. Fundamental aspect of electromagnetic fields, and microwave, sun and infrared drying is reviewed and the effect of drying method on the drying rate, heating rate and product quality have been discussed along with different applications. A general mathematical modeling based on the diffusion theory (mass and heat conservation equations), Maxwell’s equations, Lambert’s law and Poynting vector theorem that predicts the volumetric heating and drying behavior of bioproduct was derived and the importance of this procedure of analysis on the drying process optimization were also discussed.
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Acknowledgments
The authors would like to express their thanks to CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico, Brazil), CAPES (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Brazil), and FINEP (Financiadora de Estudos e Projetos, Brazil) for supporting this work; to the authors of the references in this paper that helped in our understanding of this complex subject, and to the Editors by the opportunity given to present our research in this book.
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Barbosa de Lima, A.G., Delgado, J.M.P.Q., Silva, E.G., de Farias Neto, S.R., Santos, J.P.S., de Lima, W.M.P.B. (2016). Drying Process in Electromagnetic Fields. In: Delgado, J., Barbosa de Lima, A. (eds) Drying and Energy Technologies. Advanced Structured Materials, vol 63. Springer, Cham. https://doi.org/10.1007/978-3-319-19767-8_5
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