This study delves into the multifaceted landscape of energy efficiency management with the objective of rationalizing the utilization of energy resources. The article considers a methodical approach to the study of the level of energy intensity of economic activity, covering levels of management, from the macro level to the level of an individual enterprise. In general, it is advisable to supplement the proposed approach with existing methods that extend the content to the results of energy efficiency research. Using the Life Cycle Assessment (LCA) method and other methodologies, we explore various dimensions of energy resource utilization and the scale of energy efficiency management across different stages of the lifecycle. Additionally, the study introduces levels of energy efficiency management developed by the authors, providing a structured framework for optimizing energy use. Through rigorous analysis, we evaluate the environmental impacts, energy consumption patterns, and efficiency levels associated with diverse energy management strategies. Our findings illuminate key areas for improvement and optimization in energy utilization practices, offering insight beneficial for policymakers, industry stakeholders, and environmental advocates alike. By leveraging the comprehensive framework of LCA alongside the developed levels of energy efficiency management, this research contributes to a nuanced understanding of energy efficiency management, thereby facilitating informed decision-making towards sustainable energy utilization pathways. Examining the example of building the life cycle of gas production and highlighting the main stages of its transformation from a raw resource to a finished product for consumption allows for the consideration of the entire chain of creation of the added value of this energy resource and enables control of the level of its influence on the results of the activities of economic units involved in this chain, as well as the consequences of their impact on the environment. This allows us to conclude that the approach discussed in the article can be used both for researching the energy efficiency of individual enterprises, as well as their associations, industries, and the economy in general.

The paper presents an experimental study on the formation process of burden surface texture on the blast furnace throat and its influence on the radial distribution of gas flow. The study was performed with the application of blast furnaces equipped with a bell-type charging device using radio-isotope means for the control of burden surface texture (profile) and burden surface level, i.e., gamma locators for burden surface texture. The study was carried out under the conditions of an operating blast furnace in an iron and steel plant using a unique GEOTAPS system for automated control of geometric and temperature parameters of burden material surface on the blast furnace throat. The influence of the surface texture on the gas flow distribution was also investigated. The possibility of a self-stabilization effect for burden surface texture and gas flow in an operating blast furnace under suitable conditions was experimentally proven. As a result of the experimental study performed, four ways of energy-saving technology implementation were determined for the control of blast furnace melting based on the data on the burden surface texture and previously unknown regularities of surface layer formation of burden material on the throat of an operating blast furnace with a bell-type charging device. The main idea of the paper is the development of automated control for the radial distribution of burden material and gas flow using actual or predicted surface texture parameters as important intermediate factors that both describe the process and have a significant simultaneous influence on it.

Purpose. To study the impact of digital maturity of energy enterprises on achieving the effects of sustainable development in the conditions of the fourth industrial revolution. Methodology. The study on energy enterprises economic efficiency was based on the results of a statistical analysis of their activity economic indicators and a macroeconomic analysis of the prerequisites for the digitalization of Ukrainian energy companies, as well as considering the results of an analytical study of foreign companies digital transformation. The application of the benchmarking method made it possible to highlight the best examples of digital changes of energy companies in the field of sustainable development. The generalization method made it possible to point out the effects of digitization of sustainable development for energy companies. Findings. Effectiveness of energy enterprises due to the implementation of digital transformation is reasoned, which allows achieving the effect of sustainable development by ensuring environmental, economic, and social development. Based on the calculation of economic efficiency values, the most efficient energy enterprise was determined, whose activity is characterized by the highest level of digital transformations aimed at achieving the goals of sustainable development. Originality. The dependence between the level of digital maturity of energy enterprises and their economic efficiency is substantiated. The spheres of energy enterprises activity have been established, whose efficiency and importance increases with the level of digitalization. The technical characteristics of energy enterprises digitalization in the spheres of implementation of sustainable development goals, namely economic, social, and environmental ones, are highlighted. Practical value. The main directions of energy enterprises activity have been determined based on the selection of the effects of sustainable development, which are achieved thanks to digitalization. The efficiency of the enterprise because of digitalization is substantiated, considering the directions of sustainable development.

The purpose of the paper is to substantiate the expediency of diversifying educational services in the context of energy transformation and to highlight the modern approaches and teaching methods that contribute to the implementation of changes in the coal industry in the context of its reform to...

Purpose. To justify the prerequisites of the energy transition as a necessary condition for the implementation of changes in the energy sector and the importance of the concept of smart specialization as a potential for generating investments for the implementation of measures within the framework of the energy transition. Methodology. The method for calculating the average annual rate of growth of renewable energy capacities was used. To substantiate the growth potential of investments in the energy transition in regions, the compound interest method was used, and an investment forecast was made based on the growth rates of foreign investments in Ukraine and the growth rate of global investments in low-carbon energy. Findings. The necessity of energy transition for Ukrainian energy industry is substantiated, and it is proposed to implement the policy of smart specialization for the implementation of energy changes. An example of coal-mining regions was considered, and attention was drawn to the importance of the development of the coal industry to ensure energy security, while the priority of the development of renewable energy sources was emphasized. Originality. The relationship between the implementation of the energy transition policy and the regional policy of smart specialization is substantiated, taking into account the provisions and content of modern regulatory acts on regional development and energy transition, as well as familiarizing with the experience of foreign countries. Practical value. The expediency of considering the issue of energy transition together with the implementation of the concept of smart specializations at the regional level is substantiated. This will make it possible to focus on energy sector to explore the prerequisites for the implementation of energy changes and to attract additional investments, taking into account the world experience of investing in low-carbon energy.

The static and dynamic reserve of voltage in input of voltage autonomous inverter being a component of parallel power active compensator on the physical realizability of inactive current components with the determined response, pulsations amplitude and commutation frequency of invertor switches was considered. Invariance of closed system of automated power quality regulation with relay control to the parametric and external disturbances is provided by the dynamic voltage reserve calculated from the obtained expressions. Special attention is given to the possibility of using this system in mining. Proposed approaches also can be used in the training of engineers in the electrical and mining industries.