Browsing by Author "Nakashydze, Liliya V."
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Item Assessment of Energy Security of Ukraine in the Implementation of Renewable Energy Technologies(Національний університет «Полтавська політехніка імені Юрія Кондратюка», 2022) Hilorme, Tetiana; Nakashydze, Liliya V.; Liashenko, IrynaENG: The article investigates the definition of indicators of effective assessment of energy security of Ukraine in the implementation of renewable energy technologies based on SWOT analysis. Priority of implementation of technologies using energy of renewable sources on leveling of threats to energy supply of the country is defined. The scientific and methodological approach to assessment of innovative development of Ukraine in the system of energy security using a modified model of SWOT analysis is substantiated. The advantage of the model is compactness of development due to the use of a single platform and efficiency of use due to the absence of the need to reload data into a specialized system. With the help of fractal analysis, a graphical interpretation of the comparison of SWOT analysis components in the innovative development of Ukraine in the system of energy security is built. The peculiarity of the proposed model lies in the fact that the data, having both qualitative and quantitative characteristics, are subject to analysis. As a conclusion, it is proposed to carry out an economic analysis of the factors influencing the prioritization of key technologies in the Ukrainian industry.Item Determination of Features of Formation of Energy Supply Systems with the Use of Renewable Energy Sources in the Transition Period(ПП «Технологічний Центр», Харків, 2021) Nakashydze, Liliya V.; Gabrіnets, Volodymyr O.; Mitikov, Yurii; Alekseyenko, Sergey; Liashenko, IrynaENG: An urgent scientific and practical problem is the formation of energy efficient systems for ensuring climatic conditions in premises based on the use of renewable energy sources. The work has improved the technical and methodological approach to the calculations of energy supply and storage systems when using energy-active fences. The special effectiveness of these fences has been shown in the transitional periods of the year, that is, in spring and autumn. A mathematical model has been developed to reliably predict the process of ensuring temperature comfortable conditions (heat balance) when using nonparametric statistics methods. It will improve the quality of forecasting the effect of external air temperature during the transitional periods of the year. The temperature inside the room is taken into account in the presence of a multilayer energy-active fence. To determine the approach to the use of heat in energy supply systems during the transition period, thermal parameters from the inner and outer sides of the building structure are considered. This makes it possible to take into account changes in the heat transfer of these structures when designing a power supply system and determining the optimal modes of its functioning in various natural conditions. The function of energy-active fences associated with the generation of additional heat into the system, obtained through the conversion of solar radiation energy, is considered. To increase this generation, special multilayer designs of energy-active fencing have been proposed. The proposed thermal modernization with the use of energy-active fences allows, on average, over the cold period of the year, to reduce energy consumption by 3.5 times for industrial and residential buildings.Item Improvement of Reliability of Converters of Renewable Energy Considering the Characteristics of Problem Areas(SHEE “Prydniprovska State Academy of Civil Engineering and Architecture”, Dnipro; Slovak University of Technology, Bratislava, Slovakia, 2018) Nakashydze, Liliya V.; Nakashydze, Irina S.; Brynzin, YevhenEN: The use of the proposed methodology allows consideration of the features of operation of certain problem areas of constructive interfaces, including those that are technologically equipped with the largest number of thermal conductive inclusions per unit area, i.e. to determine the worst heat-shielding characteristics by which heat losses of building premises should be determined.Item The Model for Forecasting Sales of Energy Supply Systems Based on Renewable Energy Sources(Сумський державний університет, 2023) Hilorme, Tetiana; Nakashydze, Liliya V.; Liashenko, IrynaENG: Building an effective model for forecasting sales of products (works, services) allows enterprises to achieve the desired level of competitiveness. It is determined that the most relevant for industrial enterprises, engaged in the sale of energy supply systems based on renewable energy sources, are economic and mathematical methods that take into account the seasonality factor. The purpose of the article is to build a model for forecasting sales of energy supply systems based on renewable energy sources. The main research method is correlation and regression analysis. The article substantiates a model for forecasting the sale of energy supply systems to economic agents by industrial enterprises, which is based on determining the functional relationship between the seasonality factor (seasonal component, harmonic component of the model) and the objective function of ensuring an effective time sequence of management decisions/measures and which, unlike the existing ones, takes into account the duration of the seasonality factor, which increases the efficiency of management decisions by optimizing the time lag between their adoption and implementation. As a conclusion, the elasticity coefficient for energy saving costs in order to ensure the competitiveness of industrial enterprise products reaches 100 times the value.Item Quantitative and Qualitative Aspects of Solar Energy Input to the Working Surface of a Solar Photovoltaic Installation During Ground Testing(АКЦЕНТ ПП, Dnipro, 2019) Nakashydze, Liliya V.; Nakashydze, Irina S.EN: The monograph deals comprehensively with the use of renewable energy sources in terms of the introduction of energy-saving technologies, the solution of problems of increasing the reliability of their use, the formation of a system for assessing the development of renewable energy sources in the face of global challenges, etc. These issues are considered in detail in the analysis of the prospects for the use of elements of protection against electrical overload in solar cells, the results of experimental studies of the implementation of such components. The application of heat pump technologies and energy-active converters of solar radiation energy in the field of resource saving is considered. Materials for solving the problems of acoustic impact on the environment in the implementation of energy-saving technologies, etc. are presented in various ways. This monograph is of scientific and practical importance and is intended for masters, postgraduate students of technical and economic specialties, teachers, researchers and managers engaged in energy saving technologies at industrial enterprises and in the housing and communal sector of Ukraine. .Item Substantiation for the Selection of Parameters for Ensuring Electrothermal Protection of Solar Batteries in Spacecraft Power Systems(РС Тесhnology Сеntеr, Kharkiv, Ukraine, 2022) Hilorme, Tetiana; Nakashydze, Liliya V.; Mazurik, Stanislav; Gabrіnets, Volodymyr O.; Kolbunov, Vadim; Gomilko, IgorENG: A relevant scientific-practical issue related to the sustainable development of outer space is the selection of optimal parameters of solar panels for the uninterrupted supply of energy in the power plants of spacecraft. It has been determined that advancing energy-efficient technologies is a prerequisite for ensuring stable space activities. The decision-making process regarding the choice of alternative options for ensuring the electrothermal protection of solar panels in the power plants of spacecraft occurs under the conditions of uncertainty and various risks. A methodical approach to assessing the effectiveness of options for building electrothermal protection systems for solar panels in the power plants of spacecraft has been devised. The hierarchical structure of the problem about approving of the choice of electrothermal protection of solar panels has been constructed on the basis of the method of analytical hierarchical process, which makes it possible to derive a set of optimal options. Five alternative options for electrothermal protection of solar panels have been chosen, which, unlike existing ones, take into consideration the phases of the life cycle, namely, the period of active operation. The selection of criteria for choosing the parameters of ectrothermal protection of solar panels in the power installations of spacecraft has been substantiated: ensuring the smooth operation of solar panels; availability of service in emergencies; the life cycle of solar panels; the cost of solar panels; technical safety; mass-size indicators. It is argued that the chosen optimal alternative “Solar panels with protection on the basis of self-resetting fuses” could prolong the active life cycle and, as a result, reduce the number of repairs (current and overhaul) of solar panels in space activities. Owing to the use of this option, positive results could be achieved such an increase in the active life cycle by 20 %, as well as an increase in technical safety by 24 %.