The mathematical modeling of changes in grain moisture and heat loss on adsorption drying from parameters of grain dryer

Rogovskii, I. L.; Stepanenko, S. P.; Novitskii, A. V.; Rebenko, V. I.

doi:10.1088/1755-1315/548/8/082057

IOP Conf. Ser.: Earth Environ. Sci.

2020

DOI: 10.1088/1755-1315/548/8/082057

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The mathematical modeling of changes in grain moisture and heat loss on adsorption drying from parameters of grain dryer

I. L. Rogovskii

S. P. Stepanenko²,

A. V. Novitskii

et al.

Abstract: The literary review has established that to reduce the heat loss of a dryer, the heat insulation of the dryer design, heat recovery and suction air flow are used. However, the use of prospective suction airflow is not fully disclosed. In the article, based on the equations of mass transfer, thermal and material balance, the dependences of grain moisture and heat consumption on drying from the regime parameters of the dryer, grain properties, and air flow used during drying are found. Analytical dependencies ar… Show more

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Cited by 3 publications

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Modeling and calculation power saving modes grain drying materials under energy fields

Hryshchenko

2020

Tehnìka ta energetika

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Storing grain quality materials in post harvest handling and storage is largely dependent on correctly implemented the drying process. In agricultural production mainly use costly convection dryer. The main share of wasteful energy consumption accounts for heat drying agent, some heat is lost to the environment through the working surface of the dryers and spent coolant. Ways to reduce these energy costs is to reduce the amount of drying agent in the process to the level necessary to absorb and remove moisture from the dryer and the working volume of the principles of targeted "delivery" of energy to vysushuyemoho material. Last principles successfully implemented using contactless energy supply of electromagnetic fields in a material exposure by microwave or infrared radiation. The article deals with the theoretical background processes of drying material in cyclic mode with infrared heating and high frequency electromagnetic field. The equations change over time settings grain material by heating using high frequency electromagnetic field or infrared light and ventilation in the grain does not allow heated air drying cycle count process. The algorithm calculating the overall process of drying cycle to determine rational modes of the process, providing minimize energy costs. The article deals with the theoretical background processes of drying material in cyclic mode with infrared heating and high frequency electromagnetic field. The equations change over time settings grain material by heating using high frequency electromagnetic field or infrared light and ventilation in the grain does not allow heated air drying cycle count process. The algorithm calculating the overall process of drying cycle to determine rational modes of the process, providing minimize energy costs. The article deals with the theoretical background processes of drying material in cyclic mode with infrared heating and high frequency electromagnetic field. The equations change over time settings grain material by heating using high frequency electromagnetic field or infrared light and ventilation in the grain does not allow heated air drying cycle count process. The algorithm calculating the overall process of drying cycle to determine rational modes of the process, providing minimize energy costs. The equations change over time settings grain material by heating using high frequency electromagnetic field or infrared light and ventilation in the grain does not allow heated air drying cycle count process. The algorithm calculating the overall process of drying cycle to determine rational modes of the process, providing minimize energy costs. The equations change over time settings grain material by heating using high frequency electromagnetic field or infrared light and ventilation in the grain does not allow heated air drying cycle count process. The algorithm calculating the overall process of drying cycle to determine rational modes of the process, providing minimize energy costs.

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Modeling and calculation power saving modes grain drying materials under energy fields

Hryshchenko

2020

Tehnìka ta energetika

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Statistical Analysis of Functioning of Repair Service of Ukraine

Nоvitskiy¹

2021

Tehnìka ta energetika

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The efficiency of agriculture and its individual sectors largely depends on the provision of technical means for technological processes of production. Reducing the number of agricultural machinery and equipment, reducing the quality indicators of their use leads to a reduction in the volume of production of the agrarian industry. In connection with the constant development of scientific and technological progress, the study of the market of agricultural machinery and repair costs for loss of performance requires new research and modern scientific approaches. In recent years, the formation of directions to ensure the reliability of agricultural machinery in the system of innovation processes based on the analysis of repair costs remains relevant. The paper presents the results of research on the dynamics of expenditures on repair of agricultural machinery in the period 2015-2019. From the information sources of the State Statistics Service of Ukraine it was found that in 2019 the costs of repair of agricultural equipment amounted to 2127.5 million UAH. The maximum expenses for repair of agricultural equipment in 2019 in Ukraine among regions was 279.55 million UAH in Kyiv region. Expenditures of funds for repair of agricultural equipment in Kyiv region have a dispersion in the range from 1,726 thousand UAH to 44866.29 thousand UAH. During the processing of statistical data, the agricultural enterprises of the region were conditionally divided into three gradations: І grade – 42 enterprises; ІІ grade – 101 enterprises; ІІІ grade – 43 enterprises. Prospective directions of research are the analysis and synthesis of costs for repair of agricultural machinery, improvement of maintenance and repair strategies. The methods of research of agricultural machinery repair costs should be based on the results of statistical analysis, take into account the state of machines in operation, the repair strategies addopted, the results of technical condition monitoring.

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Experimental study of grain vibration during high-intensity heat treatment

A.¹,

Stepanenko²,

Котов³

2020

M&EAgri

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Purpose. Clarification of the mathematical description and calculation of the processes of micronization and vibrational movement of grain in cross-air flow on the basis of experimental studies. Methods. Experimental studies were performed on a manufactured sample of a machine for high-intensity heat treatment of grain using experimental planning methods and statistical processing of experimental data. Results. A mathematical description of the motion of grain mixture particles on a vibroconveyor with high-intensity heat treatment of grain during action on the mixture of air flow is given. The trajectories of particles with different sizes depending on high-intensity heat treatment are obtained. With certain assumptions, the regularities of the change in the speed of movement and exposure of the micronization of the material particle (grain) from the coordinates and humidity are obtained. Conclusions. As a result of research: 1) a regression dependence was obtained to determine the micronization exposure and it was established that the micronization exposure for the given energy parameters of the installation should last from 60 to 180 seconds; 2) the change of the speed of vibratory movement of grain depending on its humidity is theoretically substantiated and it is proved that the ascending air flow increases the speed of grain movement, and the descending one – decreases; 3) experimentally determined the empirical dependence of changes in the speed of vibration, which allows the formation of the required speed of vibration of grain by changing the parameters: the slope of the vibrating surface 5÷8°, oscillation frequency 33÷52 s-1, grain moisture 10÷20% and downward air flow rate 0.1÷2 m / s in rational modes of installation for grain micronization on a vibrating conveyor. Keywords: trajectory, vibration displacement, vibration conveyor, air flow, micronization, humidity, coefficient of friction.

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The mathematical modeling of changes in grain moisture and heat loss on adsorption drying from parameters of grain dryer

Cited by 3 publications

References 11 publications

Modeling and calculation power saving modes grain drying materials under energy fields

Modeling and calculation power saving modes grain drying materials under energy fields

Statistical Analysis of Functioning of Repair Service of Ukraine

Experimental study of grain vibration during high-intensity heat treatment

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