Evaluation of the efficiency of microwave heating of soils

Authors

DOI:

https://doi.org/10.15587/2706-5448.2023.286551

Keywords:

disinfection technologies, experimental studies, energy efficiency, heat of transformation, thermal calculations, efficiency factor

Abstract

One of the innovative directions of heat treatment of soil in the technologies of decontamination from pesticides, oil products and disinfection is heating in a microwave electromagnetic field. Numerical studies testify to the effectiveness of the microwave treatment method. This is due to the peculiarities of the interaction of the microwave field with dielectric materials. Unique effects arise, such as the possibility of local heating, volume heating of the material, unidirectionality of pressure and humidity gradients. This contributes to the intensification of transfer processes and the possibility of energy savings. However, the challenge at present is to determine the processing regimes, including load mass, specific microwave field power, electric field strength, material layer thickness, and processing time, under which the microwave method will be energy efficient. Conducting multifactorial experimental studies allows determining the conditions of energy feasibility of microwave soil treatment. Therefore, the object of research is the process of heating a dense layer of soil under the action of a microwave electromagnetic field.

The results of studies on the effect of microwave treatment of soil contaminated with organophosphorus pesticides, contaminated with petroleum products, and under what conditions the qualitative effect was obtained, as well as the results of the effect of the microwave field on the pathogenic microflora of the soil used for growing plants, were considered. The high quality of implementation of soil treatment technologies is determined. Energy efficiency was determined on the basis of data on temperature and moisture content, analysis of thermograms of microwave heating of chernozem and clay soil, analysis of the influence of material layer thickness, influence of dielectric properties and power of the microwave field. According to the results of thermal calculations, the values of the efficiency of the microwave chamber and the intensity of the electric field were determined, which are recommended as the basis for scaling in order to transfer the experimental results to industrial installations.

During the research, specific experimental methods of research under microwave heating conditions, analytical methods of thermal calculations, developed by the authors of the experimental research methodology were used. Experimental studies were carried out on the installation created by the authors. The results of the research are intended for the wide implementation into practice of technological calculations of microwave chambers for heat treatment of soils, intensification of disinfection processes under the conditions of energy efficiency of the transformation of the energy of the microwave field into the internal energy of the soil.

Author Biographies

Oksana Bondarenko, Odesa National Technological University

Postgraduate Student

Department of Oil and Gas Technologies, Engineering and Heat Power Engineering

Irуna Boshkova, Odesa National Technological University

Doctor of Technical Sciences, Professor

Department of Oil and Gas Technologies, Engineering and Heat Power Engineering

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Evaluation of the efficiency of microwave heating of soils

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Published

2023-08-30

How to Cite

Bondarenko, O., & Boshkova, I. (2023). Evaluation of the efficiency of microwave heating of soils. Technology Audit and Production Reserves, 4(1(72), 40–47. https://doi.org/10.15587/2706-5448.2023.286551

Issue

Vol. 4 No. 1(72) (2023): Industrial and technology systems

Section

Technology and System of Power Supply

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Copyright (c) 2023 Oksana Bondarenko, Irуna Boshkova

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