Факультет цифрових технологій та автоматизації виробництва
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Документ Theoretical analysis of strength resistance to displacement of improved digging working body of potato combine harvester(National Institute for Research-Development of Machines and Installations Designed for Agriculture and Food Industry, 2021) Nalobina, O. O. ; Shymko, A. V.; Bundza, О. Z.; Holotiuk, M. V.; Herasymchuk, O. P.; Puts, V. S.; Shovkomyd, O. V. ; Налобіна, О. О.; Голотюк, М. В.; Бундза, О. З.The amount of energy required to perform technological processes in agriculture largely depends on the size of the resistance to the displacement of the working bodies of machines. The main factor of energy consumption performing the technological process of potato harvesting is the resistance to the displacement of the diggingworking body. In order to reduce the resistance to displacement an improved design of the digging body is proposed. An analytical study was conducted to determine the problem of moving the working body in the soil environment. The strength of the soil resistance is determined and the regularity of the influence on its change of parameters and the shape of the blade and separation parts of the digging working body is established.Calculations are made using the Mathematica application program. The graphic dependences and contours of the isocline ofthe traction flange of the working bodyploughshare part are obtained. Analysis of the calculations allowed to set the parameters of the instrument panelsurface,of which provide a minimum of traction resistance. The schedule and contours of isoclines of the change of the total resistance to the displacement of soil mass with the tubers onthe working bodyseparation surface depending onthe distance between the bars and the size of their intersection are also obtained.Analysis of the dependence of soil resistance and tubers on the separation surface indicates that an increase in the size of the geometric size of rods intersection leads to a significant increase in the resistance of the medium. The material presented in the article can be used for analytical determination of the resistance of the diggingworking body of potato harvesting machines of arbitrary geometric shape in the soil medium with tubers.Документ Criteria for Evaluation of Efficiency of Energy Transformation Based on Renewable Energy Sources(Economic Laboratory for Transition Research, Podgorica, 2018) Nitsenko, V.; Mardani, A.; Streimikis, J.; Shkrabak, I. V.; Klopov, I.; Novomlynets, O.; Podolska, O.; Шкрабак, І. В.In the context of shortage of natural resources in Ukraine, the prob-lem of evaluating efficiency of the implementation of renewable energy sources (RES) becomes of particular importance and comes in first place, since its solution will reduce the energy dependence of the state. Theoretical, methodological and practical issues of diver-sification of energy sources and evaluation of their effectiveness have found their development in modern works of domestic and foreign scientists. However, methods proposed by the scientists for evaluating efficiency of the transformation of energy consumption based on RES are purely theoretical and do not fully allow to deter-mine the current state and directions of diversification of energy sources. The research is aimed at improving methodological support and developing criteria for evaluating the efficiency of energy con-sumption transformation based on RES. The article considers the main methods of evaluating efficiency of involving RES in the energy consumption of the state, region and enterprise. Advantages, draw-backs and perspectives of diversifying energy sources based on RES are shown. The system of criteria for evaluating effectiveness of energy consumption transformation based on RES is proposed. It is based on economic, environmental and social efficiency.