Engineering, Energy, Transport AIC

Sergii LYASHENKO – Candidate of Technical Sciences, Associate Professor, Head of the Department of Agricultural Engineering and Road Transport of Poltava State Agrarian University (1/3 Skovorody St., Poltava, Ukraine, 36003, e-mail: sergii.liashenko@pdau.edu.ua, https://orcid.org/0000-0002-3227-3738).
Oleksandr KASHCHENKO – Postgraduate Student in specialty 133 Industrial Mechanical Engineering of Poltava State Agrarian University (1/3 Skovorody St., Poltava, Ukraine, 36003, e-mail: oleksandr.kashchenko@pdau.edu.ua, https://orcid.org/0009-0009-7198-9729).

Today, about 3.5–4.0 million m³ of woody biomass is used for energy purposes, such as heating individual residential buildings and social facilities in rural areas with fuelwood, heat generation based on wood waste for technological processes and space heating at wood-processing enterprises, production of thermal and electrical energy at combined heat and power plants and municipal boiler houses, as well as the production of wood briquettes, pellets, charcoal, and synthesis gas.
An effective state policy in the field of woody biomass utilization will make it possible to additionally involve about 4.0 million m³ of energy woody biomass in the energy balance of Ukraine, which will contribute to reducing the country’s energy dependence.
In recent years, there has been an intensification of private business activity in the field of energy use of wood, which indicates the economic attractiveness of this area, but at the same time creates risks of excessive competition due to the limited wood resources in Ukraine.
Thus, stimulating the rational processing of wood waste and the development of innovative technologies is a strategic task of the state and society aimed at increasing the efficiency of woody biomass utilization.
To improve the energy efficiency of the wood biomass comminution process, it is necessary to study the influence of design parameters, in particular the cutting angle and rotor rotational speed, on specific energy consumption and comminution quality.
The results of experimental studies showed that the optimal specific energy consumption at the level of 1.3 Wh/kg is achieved at a cutting angle of 32°44′ and a rotor rotational speed of 1409 min⁻¹. Under these parameters, when using screens with a hole diameter of 0.019 m in the design of a rotary-disc wood biomass grinder, the formation of a particle size distribution of the comminuted material with particle sizes from 3.15 to 45.00 mm in the amount of 89.5% is ensured at a wood moisture content of 34.5%.
The obtained data make it possible to improve the design of the rotary-disc grinder and to substantiate optimal operating modes for reducing energy consumption in the process of wood biomass comminution.

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