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This article addresses the problem that fluctuations in the torque of an internal combustion engine (ICE) lead to additional energy losses, as it causes fluctuations in the speed and kinetic energy of the car. These losses increase as the frequency of oscillations of the torque of the internal combustion engine approaches the frequency of free (natural oscillations) of the running gear of the car in the longitudinal direction. If there is an elastic connection between the traction force and the movement of the car, the movement of the latter can be represented as complex. At the same time, the portable movement is uniform, and the relative movement is oscillatory. This article presents the results of the study of these losses for cars with mechanical and combined electromechanical drive wheels. Analytical expressions are obtained, which allows to take into account additional energy losses including the tangential rigidity of the tire and the rigidity of the suspension in the longitudinal direction. When using a combined electromechanical drive of the drive wheels as well as in the case of a mechanical transmission of a car, the resonance is dangerous. But with the increase in the share of torque kem on the wheel generated by the electric motor, the relative additional energy losses for the movement of the car are reduced.

The main parameters of the microclimate of pig farms are regulated by the norms of technological design. Naturally, such micro-climate parameters at real energy prices require high costs, but these are the most favourable conditions for the life of suckling piglets. According to the presented analysis, the problem of research is the need to provide a micro-climate in the room for comfortable keeping of pigs, which is currently achieved through high energy. The purpose of the development is to increase the efficiency of the microclimate of pig farms by using a mechatronic control system, rational use of utilized air energy and soil thermal potential with reduced energy costs of the ventilation system. The problem is solved by creating such a mechatronic system to ensure the microclimate of pig farms, which can: switch the direction of airflow to ensure the operation of the system in winter and summer; to control the movement of air, which must be disposed of according to the parameters of its quality; to provide a local microclimate in each place where animals are kept; rational use of soil thermal energy as a source of alternative energy; to carry out automatic pumping of the water necessary for humidification of air, and its utilization. The article presents the results of research of parameters of the developed mechatronic system of providing microclimate of pig premises, which were carried out in three stages: research of heat exchanger of side-evaporating type; substantiation of the ventilation system of polluted air intake; substantiation of the ventilation system for injecting clean air taking into account it's geothermal heating/cooling. The advantage of the proposed mechatronic system of the microclimate of pig farms is that it allows increasing the efficiency of microclimate by rational use of energy of utilized air (due to the use of side-evaporator type heat exchanger based on Maisotsenko cycle) and soil heat potential (geothermal energy) at low operating costs of the ventilation system through the additional provision of mechatronic elements. The presented results of numerical simulation of the indirect evaporative heat exchanger allow us to state that the cooling effect obtained in indirect evaporative channels can be quite high in comparison with traditional air conditioning patterns. The presented heat exchanger based on the Maisotsenko cycle (M-cycle) of considered heat carrier flow scheme is characterized by its high cost-effectiveness, low specific cost, small operational costs and structural simplicity, which is confirmed in the works. The models obtained in the Star CCM +software package can be used for optimization analysis of air-cooling with variations in the Reynolds number, humidity, channel length and geometric dimensions of channels. Because of analytical investigations of the contaminated air intake ventilation system, the method was developed and on its basis – the algorithm was implemented for the determination of geometrical arrangement of holes in the air duct of the mechatronic system for pigsty microclimate maintenance.

The research deals with problems of animal waste potential usage in order to produce biogas for energy generation in Ukraine. Although there are favorable conditions to develop biogas sector based on animal waste, the share energy, produced from it, is extremely low. The paper analyzes energy potential of agricultural biomass in Ukraine, economic tools, aimed at stimulating electricity generation from biogas based on animal waste, the results of their impact on biogas plants deployment. Among a number of barriers, which inhibit the development of this sector in Ukraine, the main ones are the need for significant initial investments to construct profitable biogas plants and a large amount of raw materials for their uninterrupted operation. Given the fact that 48.2% of farm animals are concentrated in small-scale farms and households, which cannot individually implement biogas projects, it is proposed to combine their financial and raw material resources within energy co-operatives. Economic benefits, which may be gained by small-scale farms within energy co-operative through the sale of electricity, generated from biogas, by feed-in tariff are calculated. It is discussed that in addition to economic benefits for small-scale farms owners, realization of the co-operative model in the bio-energy sector will let to obtain a number of ecological and social benefits both for territorial communities, and the state as a whole. International Journal of Sustainable Energy Planning and Management, Vol 18 (2018)

The relevance of this study is to solve the basic task for society to ensure sustainable management by improving the spatial management system of natural resource assets, increase their usage efficiency and ensure sustainable socio-economic development of Ukraine on this basis. At all levels of the state government, there appeared a need to ensure spatial management and transform the organizational structure of natural resource management on the basis of the introduction of a modern system of territorial natural entities with the change of relevant functions, mechanisms and powers in the direction of increasing the ecological and economic effect in various spheres of economic activity. Aim of the research: identification of the highest priority, to ensure sustainable management in resource constraints, the composition of threats and risks and their grouping; development of a closed scheme of permanent clarification of the most important, for spatial sustainable development, threats and risks. The methodological basis of the study is the work of domestic and foreign scientists on spatial management of natural resources, sustainable spatial development and economic security, regulations, analytical and statistical materials of ministries and departments, international organizations, other scientific and information materials. The study involves the use of a number of interrelated methods, including methods: analysis and synthesis; system analysis; economic and mathematical; expert assessments; graphic, etc. The scheme of grouping of organizational and economic mechanisms of realization of spatial model of management of sustainable management within a certain state formation is constructed. According to which a universal, for three stages of implementation of the corresponding type of macro- model (initiation, consolidation, incorporation) spatial management of sustainable development, algorithm is developed. The use of the latter involves: continuous grouping and identification of the most significant threats and risks (in a closed cycle of management, organizational and economic, forecasting, analytical and econometric procedures); development of measures to eliminate the consequences of turbulent shifts.

In the search for new energy resources, scientists have discovered ways to use the Earth itself as a valuable source of power. Geothermal power plants use the Earth’s natural underground heat to provide clean, renewable energy. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/33764

In the present study the interaction of Hydrogen Sulfide with inside and outside single-wall carbon nanotube of (5,0) and (5,5) was investigated. This study was conducted using DFT at B3LYP/6-31G* level of theory. Computational calculations were performed in the gaseous phase in Gaussian 09. The geometry of all molecules under investigation was determined by optimizing all geometrical variables without any symmetry constraints. The harmonic frequencies were computed from analytical derivatives for all species in order to define the minimum-energy structures. The adsorption energies, the thermodynamic properties, HOMO-LUMO energy gaps and partial charges of the interacting atoms were also studied during two rotation kinds of H2S molecules vertical and horizontal to the main axes of nanotube. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35161

The main goal of the research is to create a device structures (solar cells, optical detectors, and hard radiation detector gases) based on heterojunctions and semiconductor-metal structures. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34062

The article is aimed at researching priority sectors of investment in the energy sphere. The share of global investments in electric energy, oil, gas, development of renewable energy sources, and also in energy efficiency is analyzed. It is indicated that global investments in energy sector have decreased somewhat, in particular the investments in renewable energy sources have reduced the most. Energy investments of the world countries where the largest investors are the countries with the developed economies, namely China and the United States of America, are researched. Investment trends in the energy sector of both developed and developing countries are defined. The role of renewable energy sources in increasing access to electricity and promoting investment in electric energy decentralization technologies is allocated. The general investments and investments of the exchange market in renewable energy sources are analyzed, their priority sectors are defined. The risks that can reduce investments in energy in general and in renewable energy sources in particular are indicated.

Automobile industry is one of the most developed industries in Ukraine and in the world today. The ever-increasing demand for transportation leads to an increase in demand for fuel, which in turn increases its deficit and value. Therefore, the high cost of traditional hydrocarbon fuels and the constant reduction of their world reserves compels scientists to find renewable biofuels. The objective of this paper is to present results of a study aimed at investigating the possibility of using alternative fuels derived from the alcohol industry waste, in pure form and as additives to hydrocarbon fuels. According to the results, the main technical and operational properties of alternative fuels received on the basis of A-92 petrol and fusel oils, experimental values of density, viscosity, distillation temperature on the ENGLER machine, temperature of formation steam congestion, their optimal percentages in the mix for different types were obtained in internal combustion engines. The findings of the research also indicate that an addition of fusel oils to A-92 gasoline leads to improvement of the viscosity-temperature characteristics of formed mixtures and increase in the temperature of formation steam cork, which ultimately reduces the consumption of fuels by 10-12% and also contributes to solving the problem of recycling fusel oils.