Engineering, Energy, Transport AIC

Borys Kotov – Doctor of Technical Sciences, Professor of the Department of Agricultural Engineering and Systems Engineering, State Agrarian and Engineering University in Podilia   (St. Shevchenko, 13, Kamianets-Podilsky, Khmelnytsky region, 32316, e-mail: rkalinichenko@ukr.net, https://orcid.org/0000-0001-6369-3025).
Roman Kalinichenko – Candidate of Technical Sciences, Associate Professor of the Department of Power Engineering, Electrical Engineering and Electromechanics Separated subdivision of NUBiP of Ukraine «Nizhyn Agrotechnical Institute» (Shevchenka St., 10, Nizhyn, Chernihiv region 16600, e-mail: rkalinichenko@ukr.net, : //orcid.org/0000-0001-9325-1551).
Anatoliy Rud – Agroengineering and system technology department State Agrarian and Engineering University in Podilia (St. Shevchenko, 13, Kamianets-Podilsky, Khmelnytsky region, 32316, e-mail: anatoliyrudj@gmail.com, http://orcid.org/0000-0002-7206-7103).
Sergiy Hrushetskiy – Candidate of Technical Sciences, Associate Professor of the Department of Agroengineering and System Engineering State Agrarian and Engineering University in Podilia (St. Shevchenko, 13, Kamianets-Podilsky, Khmelnytsky region, 32316, e-mail: g.sergiy.1969@gmail.com, https://orcid.org/0000-0002-6434-1213).

One of the main requirements for grain dryers is the need for high-quality cooling of grain material after drying. Today, the most widespread are grain coolers built into grain dryers. As the practice of operation has shown, the most widespread in agriculture mine grain dryers with their cooling zones are ineffective: the temperature of the grain after cooling often exceeds the ambient air temperature by 15-30 0C, which is unacceptable. Devices with boxes have such disadvantages as uneven distribution air in the volume of grain mass and the corresponding uneven temperature field of the cooling air, limited opportunities for intensifying heat transfer during grain cooling.
More promising for agricultural grain dryers are external coolers, which are installed separately from the dryer and can operate in an independent mode, which has a number of advantages: the quality of cooling improves, the productivity of existing grain dryers increases due to the use of the cooling part as a dryer.
The main disadvantages of using the existing external column coolers: the need for an additional vehicle - a bucket elevator for reloading grain from the dryer to the column; vertical arrangement, it is necessary to use transporting means for grain for feeding to a considerable height. But if a pneumatic transport loader with a pulsating air flow is used as a vehicle, then the efficiency of the coolers can be increased due to the removal of a part of the heat accumulated by the grain by the transporting air flow.
The paper proposes an analytical rationale for increasing the efficiency of coolers with pneumatic transport in a pulsating air flow.

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