Browsing by Author "Foris, Svitlana M."

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Construction of a Mathematical Model for Dust Transport Process at an Industrial Site with a Perforated Protective Screen
(TECHNOLOGY CENTER PC, Kharkiv, 2026) Biliaiev, Mykola M.; Berlov, Oleksandr V.; Biliaieva, Viktoriia V.; Kirichenko, Pavlo S.; Kozachyna, Vitalii A.; Mashykhina, Polina B.; Savin, Valerii V.; Semenenko, Pavlo V.; Usenko, Andrii Yu.; Foris, Svitlana M.
ENG: This work considers the process of dust pollution of the air at an industrial site when using a protective perforated screen. The removal of dust from contaminated land surfaces in areas where there are coal storage facilities leads to intensive air pollution in working areas. This poses a threat to the health of workers. Therefore, for practice, an important solution is to reduce the level of dust pollution of the air at industrial sites. A likely engineering solution to such a task is to use protective screens, in particular, protective screens with perforations. These screens reduce the speed of the oncoming wind flow, which, in turn, reduces the intensity of dust formation. The location of the screens at an industrial site is important. A laboratory experiment was conducted to determine the patterns of air flow velocity distribution behind a protective screen with perforations. The experimental data showed that the screen makes it possible to reduce the wind flow velocity by 5–6 times over an extension of the order of 2H from the screen (H is the height of the screen). The air flow velocity increases intensively behind the screen in the area 2H–4H. These results make it possible to determine the rational location of the screen relative to the dust formation area. For theoretical assessment of the effectiveness of these screens, a numerical model was built based on the fundamental equations of continuum mechanics. The modeling equations include the dust mass transfer equation and the potential motion equation. Using the constructed numerical model, a computational experiment was conducted, which confirmed the effectiveness of using perforated protective screens: the area of dust air pollution in height decreased almost 3 times. The cost of computer time for conducting a computational experiment is 2 seconds. This makes it possible, when carrying out design work, to perform a series of calculations in a short period of time.
Efficiency of Low-Calorific Fuel Use in Counterflow Lime Kilns
(D.A. Tsenov Academy of Economics, Svishtov, Bulgaria, 2023) Foris, Svitlana M.; Pererva, Valeriia Ya.; Usenko, Andrii Yu.; Foris, Oleksiy M.
ENG: Highly expensive energy carriers require revision of the existing engineering approaches in heating of industrial furnaces. The paper presents the results of research into the performance of a shaft kiln for lime-stone burning, which was fired with mixtures of natural gas and a fuel gas of a low calorific value. On the basis of studying various schemes of fuel distribution between the burners, the optimal operation mode of the kiln with reduced consumption of natural gas by 30% was identified. The lime quality indicators increase when the blast furnace gas is supplied to the central burner and improve when supplied to the peripheral burners. The joint supply of blast furnace gas in the calorific value section of the natural blast furnace mixture 9.4 ÷ 35 MJ/m3 allows keeping the performance of the furnace unchanged. At the same time, the coefficient of replacing natural gas with blast furnace gas is close to unity The proposed mode of heating the furnace with a capacity of 200 t/day with a natural blast furnace mixture provides 30% natural gas savings.
Major Lessons Learnt from an Online Teaching of Automation and Control Courses during the Pandemic and the Way ahead: A Critical Interpretative Synthesis
(Public Organization "Ukrainian Assembly of Doctors of Sciences in Public Administration", Kyiv, Ukraine, 2023) Таrasevich, Iryna G.; Tarasevich, Alena V.; Foris, Svitlana M.; Kuzmenko, Mykhailo Y.
ENG: Covid-19 brought in adapted frameworks, concepts, and tools into the design and delivery of automation courses at technical universities. Although university digitalization has been around for a while, it has been used primarily for the administrative purpose rather than for teaching and learning. A natural, powerful stimulator, the pandemic pushed the universities to explore new avenues in further digitalization of education. The goal of this critical interpretive synthesis is to make a summary of the major lessons learnt from the online teaching of automation courses during the pandemic and their further implementation. It is also aimed at exploring major tensions and barriers that users (teaching faculty, students, and administrative personnel) have been grappling with. The tensions and barriers are presented in this paper from three distinct perspectives – from the perspectives of students, teaching faculty, and university administrators. Whether students thrive or survive, the faculty rethink and upskill their teaching, and the institution is capable of meeting multiple, often competing needs and shifting priorities of the market – warrants further research on the topic. An important question to be addressed in future inquiries is whether the stakeholders that are engaged in the process of developing, teaching, and taking an automation course, are able to reconceptualize their roles and continue to grow professionally.