Assessment of efficiency of drying grain materials using microwave heating

Boshkova, Irina; Volgusheva, Natalya; Тітлов, Олександр; Титар, С. С.; Boshkov, Leonid

doi:10.15587/1729-4061.2019.154527

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Paper [14] shows the prospects of using microwave energy to dry grain crops. Based on the experimental data, it was established that microwave drying should be accompanied by blowing through a grain layer.…”

Section: Testing a Microwave Device For The Treatment Of Plant Materials By Various Technologies I B O S H K O V Amentioning

confidence: 99%

Testing a microwave device for the treatment of plant materials by various technologies

Boshkova

Volgusheva

Boshkov

et al. 2020

EEJET

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Section: Testing a Microwave Device For The Treatment Of Plant Materials By Various Technologies I B O S H K O V Amentioning

confidence: 99%

Testing a microwave device for the treatment of plant materials by various technologies

Boshkova

Volgusheva

Boshkov

et al. 2020

EEJET

Self Cite

View full text Add to dashboard Cite

show abstract

Mathematical description of super-high frequencies drying process of free-running food media in device with combined energy input

2020

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At the present time the maim quantity of free-running food products, including grains, are dried in units with convective method of heat input. To intensify convective drying, general attention is paid to improving the method of moving and mixing the product with drying agent, to guarantee fast and quality drying. The use of high and super-high frequency allows can significantly intensify the drying processes, because the phenomenon of super-high frequencies energy into heat conversion throughout the processed material volume contributes to the most uniform heating of the product, compared to other heat input methods. The optimal solution for drying free-running food products is a combination of convective and high-frequency heat input methods. This combination allows controlling gradients of moisture content and temperature, changing its directions, which significantly affects quality of the resulting dry product. In this regard, combined approach to drying process modeling is of practical interest: on the one hand, there are used analytical solutions, based on physical laws application or phenomenological equations, and, on the other hand, experimentally established a relationship between temperature and moisture content of media, which is considered as a heat and mass transfer characteristic for each material.

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Analytical study of temperature field during microwave drying of the material

Boshkova

Volgusheva

Boshkov

2020

J. Phys.: Conf. Ser.

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Mathematical models of heating wet materials in a microwave field are analyzed. A thermal conductivity model is presented that considers two internal sources of heat, positive and negative. A negative heat source considers moisture output during drying of the material. A formula is obtained for calculating the temperature of a semi-bounded body under the action of internal heat sources for boundary conditions of the first kind. The results of calculations of the temperature of water and a dense layer of wheat grain are presented, depending on the duration of the microwave field and the specific power for the heating period. It is shown that in order to obtain reliable results, it is necessary to correctly set the efficiency of the microwave chamber. The results of calculations of moisture content and temperature of a layer of wheat grain for a period of constant drying speed are presented.

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Assessment of efficiency of drying grain materials using microwave heating

Cited by 4 publications

References 14 publications

Testing a microwave device for the treatment of plant materials by various technologies

Testing a microwave device for the treatment of plant materials by various technologies

Mathematical description of super-high frequencies drying process of free-running food media in device with combined energy input

Analytical study of temperature field during microwave drying of the material

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