Факультет технічних систем і енергоефективних технологій (ТеСЕТ)
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Item Enhancement of the correlation of the photons of thermal light(John Wiley & Sons, 2021) Khokhlov, D.L.The scheme of the arrangement of five 50/50 non‐polarizing beam splitters is considered. It may provide for the enhancement of the correlation of the photons of thermal light up to 75%. The correlation of the photons after the arrangement can be measured using ghost imaging, Bell test, Hong‐Ou‐Mandel interference.Item Methodology for determining the installed capacity of a cogeneration unit and development of related measures for its implementation(Sumy State University, 2025) Yehorov, Y.; Сотник, Микола Іванович; Sotnyk, Mykola IvanovychThe decentralisation of energy supply to critical infrastructure facilities in Ukraine allows to increase their sustainability and energy efficiency by introducing cogeneration units that simultaneously generate electricity and heat. In order to determine the technical parameters of cogeneration units that should be used to supply electricity to boiler houses of heating systems or other facilities, as well as to identify additional measures to be implemented to integrate the unit into the technological process, a methodology is proposed that includes the following steps: 1. Determination of the estimated total average hourly electricity consumption by the boiler house (calculated based on the actual consumption during the coldest month of the heating period, for example, January) – Paverage fact, kW.Item An overview of robot applications in automotive industry(Published by ELSEVIER, 2021) Bartoš, M.; Bulej, V.; Bohušík, M.; Stanček, J.; Іванов, Віталій Олександрович; Ivanov, Vitalii Oleksandrovych; Macek, P.The paper deals with an overview of industrial robot usage possibility in automotive industry which nowadays is the most important customer of industrial robotic market. The first part of paper describes the situation of industrial robot usage and offers an overview of application of robots in world industry. Later we deal with the most common applications of robots, especially in the automotive industry, as well as trends and perspectives on the future of automotive robotics. Finally, there was presented a model task from real industrial practice in form of specific project overview about robotized tightening of screws on the production line of car seats at the end of the article.Item Technology of sulfur reduction in petroleum refinery flare disposal using waste metals(Sumy State University, 2025) Ahmed, I.H.; Пляцук, Леонід Дмитрович; Pliatsuk, Leonid Dmytrovych; Батальцев, Євген Володимирович; Bataltsev, Yevhen VolodymyrovychIn this experimental study, the most important topics were highlighted, namely that in all oil refineries and oil and gas producing fields, large quantities of gas are burned for purposes including getting rid of sulfur compounds and hydrogen sulfide gas (Fig. 1). The emissions of these fuels are released into the atmosphere, leaving behind greenhouse gases such as sulfur dioxide and carbon dioxide. These gases are known to directly impact climate change and global warming, in addition to being toxic and carcinogenic substances for humans, animals, and other living organisms.Item Infiltration process in selective laser sintering(Sumy State University, 2025) Bezkhlibnyi, D.; Pukhalska, G.The technological process of infiltration is widely used as a method of postprocessing of additive manufacturing products (SLS, SLM) to reduce the technological porosity of the resulting products and increase their functionality. Infiltration is carried out outside the main installation (in the furnace). It is based on the penetration of infiltrated substances, which have a lower melting point compared to the main material, into the pores of the product due to the capillary effect, which significantly increases the density. The technology is used for products obtained by sintering metal, non-metallic powders, composite compositions. The essence of the infiltration method is that a cellular framework is formed from the powder of a more refractory component, and then the pores are filled with a molten low-melting component (metal or alloy). To improve infiltration, a small amount (2.5÷5.0%) of infiltrate powder or any other lowmelting substance is added to the powder of the refractory component before molding [1].Item Investigation of the operating process of a high-pressure centrifugal pump with taking into account of improvement the process of fluid flowing in its flowing part(IOP Publishing Ltd, 2021) Кондусь, Владислав Юрійович; Kondus, Vladyslav Yuriiovych; Гусак, Олександр Григорович; Husak, Oleksandr Hryhorovych; Yevtushenko, J.V.Centrifugal pumps are used in most industries. In particular, they are effectively used in the technological processes of oil production to create reservoir pressure at oil fields. Due to increasing demand for petroleum products, there is a need to improve such pumps to increase reservoir pressure by increasing their pressure. The research considered the possibility of improving the centrifugal pump impeller design by changing its blade system. It is theoretically possible to increase the pump head by changing the blade outlet angle at the impeller outlet β2 to 75˚. The design of additional wedge-shaped blades of the second tier of the impeller was developed to reduce some additional hydraulic losses zones. They made it possible to stabilize the fluid flow in the impeller intervane channels, to reduce additional hydraulic losses. In the research, the impeller head was increased up to 26.7% for the proposed design impeller compared to the standard one. The research was performed with a comprehensive analysis of the pump installation life cycle cost. Thus, the development of new ones and the upgrading of pumping installations rooted in the industry with the aim of increasing the head is possible while achieving the minimum pump installation life cycle cost.Item Axial forces in multistage back-to-back pumps(IOP Publishing Ltd, 2021) Kovtun, O.M.; Tverdokhleb, I.B.; Lugova, S.O.; Маківський, Олексій Сергійович; Makivskyi, Oleksii Serhiiovych; Lugovii, O.L.Since the pressure of the pumps for the oil and gas industry and feed water pumps for the thermal and nuclear power plants are increasing and at the same time the production costs need to be reduced, the demands for development of the modern multistage centrifugal pumps are increased. An enlargement of stage numbers results in an increase in the distance between the bearings and as a result the shaft deflection increases. Also, a large number of stages leads to occurrence of a significant axial force acting on the pump rotor. These issues are solved by applying a back-to-back design with a throttling bush between the groups of stages. An arrangement with such throttling bush results in an additional axial force due to the different directions of leakage in the channels (side wall gaps) between the main disks of the last impellers of both stage groups and stator elements. Therefore, the design of a throttling bush with special balancing holes was proposed. This paper examines the processes occurring in the throttling bush and compares the operating parameters for two design options-with special balancing holes, and without them.Item Numerical study of the centrifugal contra rotating blade system(IOP Publishing Ltd, 2021) Куліков, Олександр Андрійович; Kulikov, Oleksandr Andriiovych; Ратушний, Олександр Валерійович; Ratushnyi, Oleksandr Valeriiovych; Ковальов, Ігор Олександрович; Kovalov, Ihor Oleksandrovych; Мандрика, Анатолій Семенович; Mandryka, Anatolii Semenovych; Ігнатьєв, Олександр Савич; Ihnatiev, Oleksandr SavychThe manuscript presents the results of a numerical study of a centrifugal contra rotating blade system based on a low-speed impeller (ns = 65). They were carried out to assess the possibility of using a contra rotating blade mesh operating in conjunction with a standard centrifugal impeller as a method of intensifying the transmission of energy to a fluid. The designs of the systems under consideration and their pressure and energy characteristics are presented.Item Modernization of centrifugal impeller blades(IOP Publishing Ltd, 2021) Ратушний, Олександр Валерійович; Ratushnyi, Oleksandr Valeriiovych; Сохань, Андрій Олександрович; Sokhan, Andrii Oleksandrovych; Ковальов, Ігор Олександрович; Kovalov, Ihor Oleksandrovych; Мандрика, Анатолій Семенович; Mandryka, Anatolii Semenovych; Ігнатьєв, Олександр Савич; Ihnatiev, Oleksandr SavychThe increase of the energy intensity of the pumping equipment reflects general tendency of technology development: to transmit more energy without significant increase of mass and size parameters of their working bodies. It is represented in the “Directive on Determining the Requirements for the Design of Products Consuming Electricity” that forwards a claim for a 40% reduction of energy consumption in Europe by 2020. Considering the task as for the increase of energy intensity of the pump stage, the possibility of creating a higher head and efficiency increase with the same overall dimensions, flow rates and speed of rotation has been considered as a way of solving the task. This can be achieved by replacing the spatial blade system of a centrifugal impeller of low (ns = 65) specific speed by cylindrical blades, since such working bodies perform the process of energy transfer from impeller to working liquid in the most intensive way. It will provide for the head rise of impeller and for the simplification of its manufacturing technology.Item The analysis of the performance of a sewage pump in terms of the wear of hydraulic components(IOP Publishing Ltd, 2021) Молошний, Олександр Миколайович; Moloshnyi, Oleksandr Mykolaiovych; Szulc, P.; Moliński, G.; Сапожніков, Сергій Вячеславович; Sapozhnikov, Serhii Viacheslavovych; Антоненко, Сергій Сергійович; Antonenko, Serhii SerhiiovychThe paper presents the comparison of the performance of the three-blade centrifugal pump operating in sewage water in the function of time. Two conditions of the analysed pump were investigated: a new one and one after a long period of utilization. The main objects of research were the impeller, due to its enormous wear, and the L–shape wear ring. Three dimensional optical scanning was applied to reflect the real geometrical parameters of the analysed pump. The investigations were conducted by means of numerical simulations and a real test. The achieved results indicate the impact of the wear on the performance curves of middle specific speed sewage pump.