UDC 631.365.22
DOI 10.36461/NP.2025.74.2.010

TEST RESULTS OF THE IMPROVED AERODYNAMIC DEVICE FOR DRYING BULK MATERIAL
M.S. Volkhonov¹, Doctor of Technical Sciences, Professor, R.M. Kovalenko¹, Postgraduate,
A.V. Khrameshin², Candidate of Technical Sciences, Associate Professor
¹Federal State Budgetary Educational Institution of Higher Education "Kostroma State Agricultural Academy", Kostroma, Russia, This email address is being protected from spambots. You need JavaScript enabled to view it.
²Federal State Budgetary Educational Institution of Higher Education "Udmurt State Agricultural University", Izhevsk, Russia

Under the climatic conditions of the non-chernozem zone of Russia, drying and active ventilation of almost all harvested grain is required. The use of aerodynamic dryers makes it possible to minimize damage to high-moisture grain. In order to reduce energy consumption and the dust content in the air of the working area, a system for recirculating the used drying agent has been developed. It has been found that the use of the developed system for recirculating the used drying agent makes it possible to increase the filtration rate through the grain by 3.08 ... 7.67%, to achieve a higher uniformity of agent distribution along the length of the drying chamber - the coefficient of variation decreases from 10.35 to 8.01%, which has a positive effect on the uniformity of drying and the stability of grain unloading. By using the recirculation system, the integral energy consumption is significantly reduced by 35.38 % from 7.8 to 5.04 MJ/kg of evaporated moisture. The operation of the mobile aerodynamic device for drying of bulk materials, equipped with the developed system of recirculation of the drying agent, is most effective in the mode of partial recirculation of the used drying agent. Opening 10-20% of the recirculation branch pipe of the valve – mixer compared to the drying agent change mode reduces the integral energy consumption by 18.84 ... 16,59 %.
Keywords: aerodynamic device, drying agent recirculation system, grain drying, air mixing.

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