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Heat and Mass Transfer in Drying of a Plate in a Continuous High- and Superhigh-Frequency Electromagnetic Field

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Abstract

The absorption of electromagnetic energy by a plate in the high- and superhigh-frequency bands is considered. Linear (at constant process parameters) problems of heating the plate using these types of energy input under convective drying conditions with the convective heat- and mass-transfer with the gaseous environment are formulated and analytically solved both in the general case and for drying at the first stage. In the former case, the drying intensity is described based on the analytical solution of the mass-transfer (moisture diffusion) problem under the condition that the phase transformations occurred at the surface of the body. For the drying process at the first stage, it is assumed that all the heat that was input to the body was consumed for moisture evaporation, because of which the body was not heated, and that the partial vapor pressure at the surface of the plate was equal to the saturated vapor pressure at the temperature of the surface of the pressure. The temperature dependence of the saturated vapor pressure was described by the Antoine equation. The heating problems were solved for the local and average-plate-volume temperature. Based on the solutions, the heating of the body and its effect on the drying kinetics were numerically modeled, which demonstrated the validity of the equations. The change in the process parameters in the course of the process was proposed to be calculated by a zonal piecewise step method.

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Authors and Affiliations

  1. Russian State Agrarian University (Timiryazev Moscow Agricultural Academy), 127550, Moscow, Russia

    S. P. Rudobashta

  2. Lomonosov Institute of Fine Chemical Technology, MIREA – Russian Technological University, 119571, Moscow, Russia

    E. M. Kartashov

  3. Ivanovo State University of Chemistry and Technology, 153000, Ivanovo, Russia

    G. A. Zueva

Authors
  1. S. P. Rudobashta
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  2. E. M. Kartashov
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  3. G. A. Zueva
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Correspondence to S. P. Rudobashta.

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Translated by V. Glyanchenko

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Rudobashta, S.P., Kartashov, E.M. & Zueva, G.A. Heat and Mass Transfer in Drying of a Plate in a Continuous High- and Superhigh-Frequency Electromagnetic Field. Theor Found Chem Eng 55, 261–269 (2021). https://doi.org/10.1134/S0040579521020093

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