Abstract
<jats:p>The monograph "Energy systems and resources: optimisation and rational use" is devoted to topical issues in the field of energy, materials science and sustainable development, including the study of magnetic field effect on silicon microstructure, development of innovative designs of solar concentrators, use of solid domestic waste in the energy balance of Ukraine, as well as the prospects and technologies of co-combustion of coal and biomass at thermal power plants. In 1 Section "Magnetic treatment of semiconductor silicon", within the framework of research on the influence of magnetic field on the microstructure of silicon grown by the Czochralsky method (Cz-Si), doped with elements Al, Mg, Cu, Fe, Zr, Hf, the influence of these impurities on the interaction energy of silicon atoms in the crystal lattice is considered for the first time. It is found that doping with elements reducing the interaction energy leads to an increase in defects during magnetic treatment for 240 hours, while 720 hours of treatment reduces their number. In 2 Section "Support frame of solar concentrator with flat triangular mirrors" of the monograph is devoted to the development of improved designs of solar concentrators used in the field of green energy. The research is aimed at reducing production costs and increasing efficiency by reducing the number of metal elements and introducing automated assembly processes. The developed new design with fewer elements contributes to cheaper production and faster assembly process. The prototypes can find wide application in agriculture, organic waste recycling and energy supply of residential buildings within the concept of "green" buildings. In 3 Section "Technological aspects of producing refuse derived fuel" special attention is paid to the issues of involvement of solid domestic waste in the energy balance of Ukraine by creating alternative solid fuel (RDF - refuse derived fuel). The kinetics of convective drying of RDF of different compositions depending on temperature and speed of the heat carrier is investigated. Drying coefficients, rates of thermal decomposition of organic and mineral substances, as well as calorific value of RDF are determined. The results obtained are the basis for the development of energy-efficient RDF production technologies to reduce dependence on fossil fuels. The 4 Section "Choice optimization of the type of energy resource for the region" considers the current state and prospects of the energy complex of Ukraine. Based on the analysis of available energy resources, the methodology of selection and justification of priority fuels for regional energy supply is proposed. Environmental aspects of utilisation of traditional resources such as coal, oil, gas and nuclear fuel are considered, as well as the possibilities of transition to alternative energy sources. The 5 Section "Scientific and technical solutions for implementing biomass combustion at coal-fired TPP in Ukraine" is devoted to the development of technologies for co-combustion of coal and biomass, which is a promising direction for reducing emissions of harmful substances, diversifying fuel sources and improving combustion conditions at thermal power plants. The technologies of biomass combustion and gasification are considered, experimental studies of co-combustion of gas coal and biomass are carried out, thermal calculations of boiler plants using ANSYS FLUENT are performed. Recommendations for implementation of these technologies at Ukrainian TPPs were developed. Thus, the results presented in the monograph are an important contribution to the solution of urgent problems in the field of sustainable energy, material science and environmental safety. The monograph will be useful for engineers, researchers, designers and specialists working in the field of energy, waste processing and development of "green" technologies.</jats:p>