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Документ Method of fault-type recognition based on the dissolved gas analysis using a set of diagnostic criteria(The Institution of Engineering and Technology, 2023) Shutenko, Oleg Volodymyrovych; Kulyk, Oleksii SerhiiovychThis paper proposes a method for recognising the fault type using a set of diagnostic criteria. Existing approaches to the interpretation of dissolved gas analysis (DGA) results usually rely on single diagnostic criteria. The proposed method solves the problems of incomplete use of diagnostic information and discrepancies in the norms and criteria for recognising the same fault inherent in the existing methods. The feature of the method is the analysis of the compliance of the DGA results of the diagnosed equipment with the ones of the equipment with a confirmed diagnosis from the fault database. This approach outperforms the existing methods in the number of faults recognised, allowing a wider range of faults to be detected, including combined faults. In addition, the method provides an opportunity to identify possible causes and localise the fault. This feature is unique and provides a significant advantage when interpreting DGA results. The proposed method demonstrates significantly higher accuracy (100%) in recognising various fault types, including combined faults, in comparison to existing methods (about 50%). The proposed method has a 60% success rate in determining the cause and location of a fault, but this figure depends on the database with faults of various types used.Документ Cleansing of oilfield wastewater using inertial forces(ФОП Яроче́нко Я. В., 2022) Seif, Houssein; Moiseev, V. F.Публікація Global energy market: development trends and relationships between its individual sectors(IOSI, Center for Tech and Media Research, 2024) Stepurina, Svitlana; Huz, Ostap; Mehyar, SamerThe energy market is one of the key factors in the functioning of various business entities and economic development in general. Here it is important to take into account the conditions for the formation of such a market, the influence of various factors on its dynamics and trends in its development. For these purposes, it is advisable to consider data from the corresponding segment of the stock market on which securities of various energy market companies are traded. The dynamics of quotes for such securities helps to understand the obvious and hidden trends in the functioning of such a market. Based on this, the work examines quotes for the classical components of individual segments of the energy market. Among these components, prices for oil, gas, gasoline and fuel oil are highlighted. The work presents graphs for different data and their individual statistical characteristics. The dynamics of the relationship between individual segments of the energy market are also considered. The research results are confirmed by individual graphs and estimates, which also makes it possible to understand the overall progress of the study.Публікація Energy market dynamics as reflected in selected european global indices(2024) Bril, Mykhailo; Petrukhnov, Oleksiy; Mehyar, SamerThe energy market plays an important role in providing appropriate resources, both for the needs of each person and for the development of various economic agents. Such provision makes it possible for individual business entities to function normally, to develop the economy and to satisfy the basic needs of people. Energy resources include oil, gas, fuel oil, and coal. The sale of these resources is carried out through their free sale on the market using various instruments in the form of certain securities. For the purposes of energy market analysis, it is important to know the quotes of such securities, taking into account the peculiarities of the functioning of a certain market segment. Based on this, the work examines the dynamics of the energy market as reflected by individual European global indices. The article presents the dynamics of individual indicators of the corresponding indices and conducts their comparative analysis. This allows you to determine the best time to enter the market. The work presents various graphs and diagrams that allow you to understand the progress of the study and evaluate the results obtained.Публікація Determination of the influence of natural antioxidant concentrations on the shelf life of sunflower oil(PC Тесhnology сеntеr, 2020) Sytnik, Natalia; Kunitsia, Ekaterina; Mazaeva, Viktoria; Chernukha, Anton; Bezuglov, Oleg; Bogatov, Oleg; Beliuchenko, Dmytr; Maksymov, Andrii; Popov, Mykola; Novik, I. O.The influence of natural antioxidants from different types of vegetable raw materials on the processes of oxidative and hydrolytic spoilage of sunflower oil during storage is studied. Plant antioxidants are more environmentally friendly and safer than synthetic ones. Green tea leaves and oak bark were used as vegetable raw materials. Water-ethanol extracts from vegetable raw materials were added to oil samples in experimental concentrations. The samples were stored in the laboratory conditions at the temperature of (20±2) °C. The study was performed for 5 months. The values of the acid and peroxide numbers were determined. The most effective blend of antioxidants showed the increase in the acid number from 0.12 to 0.20 mg KOH/g (concentration of green tea extract – 0.05 %, without the addition of oak bark extract). According to the values of the peroxide number, the most effective blends of antioxidants were the experiment points with the following green tea extract:oak bark extract ratio: (0.05:0.05) %, (0.025:0.025) %, (0.025:0.05) %, (0.05:0.025) %. To determine the induction period of oil and, accordingly, its shelf life under experimental conditions, the values of the peroxide numbers were used. It is rational to use extractives from oak bark and green tea under the following conditions: the concentration of each of the antioxidant extracts in terms of dry matter – (0.025‑0.04) %. The maximum induction period is 100 days. The efficiency of natural antioxidants in terms of the concentration of oak bark and green tea extracts is 0.05 and 0.025 %, respectively, was compared to the effectiveness of the corresponding concentration of one of the synthetic antioxidants – butylhydroxyanisole. When using butylhydroxyanisole, the induction period of oil was 65 days, and when using natural antioxidants – 74 days.Документ Визначення фізико-хімічних властивостей нафти родовища Мангишлаку(ТОВ "Планета-Принт", 2020) Умбарова, М.; Богоявленська, Олена ВолодимирівнаДосліджено фізико-хімічні характеристики нафти родовища Мангишлаку. Проведено типізацію та оцінку товарних властивостей нафти.Документ Використання діелектричної проникності нафти для прогнозування напрямку її переробки(ТОВ "Планета-Принт", 2020) Сатер, Набиль Абдель; Чернявський, Андрій ВолодимировичПредставлено метод оперативного прогнозування напрямку переробки нафтової сировини, заснований на визначенні її діелектричної проникності. Даний метод може використовуватися, як попередній етап у дослідженні потенційних можливостей сировини та легко реалізується в умовах нафтового промислу та НПЗ.Документ Процес отримання гудрону з важких вуглеводневих залишків(Національний технічний університет "Харківський політехнічний інститут", 2022) Карножицький, Павло Володимирович; Сіробаба, Мирон Олександрович; Терновська, Анастасія Сергіївна; Білець, Дар'я ЮріївнаУ роботі показано вивчення процесу отримання гудрону з важких вуглеводневих залишків. Проведено вхідні аналізи відібраних зразків нафти. Шляхом дистиляції під тиском нижче атмосферного отримані зразки гудронів.Документ Thermal-hydraulic calculation of oil pipelines network based on a two layers bond-graph(Національний технічний університет "Харківський політехнічний інститут", 2020) Fyk, M. I.; Fyk, I.; Abbood, M.Purpose. Parallel synchronized calculation of networks with certain hydraulic and thermal properties of separate oil pipelines, which is possible with the use of a two-layer bond graph and a complex methods of potentials in nodes and methods loop currents in circuits. The authors propose to link two layers of graphs of the scheme using the equation of state of oil as a gas-liquid mixture, which will simplify and increase the speed of calculations. Findings. The principles of operation of the ball valve of the shut-off valve and its main differences from the flopper shutter are considered in detail. Also, the geometric parameters of the ball itself are demonstrated in detail. Examples of design are given, and the operating principle of the most common models of shut-off valves is described. Originality. The connection of the hydraulic and thermal layer of the bond-graph is realized by taking into account the average temperatures and the total heat transfer coefficient on the branches of the graph. Practical implications. The developed system of equations of the two-layer bond graph is applied to an estimation of work of networks of oil pipelines at designing and change of operational modes.