Видання зареєстровані авторами шляхом самоархівування
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Item Вплив золошлакових відходів Сумської ТЕЦ на навколишнє середовище(Сумський державний університет, 2025) Залевська, І.В.; Гурець, Лариса Леонідівна; Hurets, Larysa LeonidivnaСучасний розвиток будь-якої сфери промисловості нерозривно пов'язаний із впливом на навколишнє середовище і сфера енергетики не виключення. У звіті [1] Енергетичного союзу ЄС наголошується на досягненні значного прогресу у сфері відновлювальної енергетики. Проте з іншого боку питання утилізації вже накопичених відходів теплоенергетики все ще не вирішене.Item Development of the Turbulent Diffusion Model of Fine Suspended Substances in the Lower Atmosphere Layer(Kaunas University of Technology, 2022) Козій, Іван Сергійович; Kozii, Ivan Serhiiovych; Пляцук, Леонід Дмитрович; Pliatsuk, Leonid Dmytrovych; Жиленко, Тетяна Іванівна; Zhylenko, Tetiana Ivanivna; Гурець, Лариса Леонідівна; Hurets, Larysa Leonidivna; Батальцев, Євген Володимирович; Bataltsev, Yevhen Volodymyrovych; Sayenkov, D.A promising direction for solving the problem of air pollution by fine substances is the use of numerical modeling in the development of mathematical models of the transport of pollutants in the atmosphere. An urgent problem in applying mathematical models with numerical algorithms and software is constructing a qualitative model that would meet both the physical parameters and fulfill all the optimal conditions of numerical analysis. The main objective of this study was to develop an algorithm of a mathematical model based on the equation of distribution of impurities in a turbulent medium. That allows considering the simultaneous influence of wind speed, turbulence of atmospheric air, pollution parameters, direction, and wind force on the size of scattering zones. The unique feature of the study is the use of the coordinate splitting equation of impurities distribution in a turbulent environment with subsequent normalization and parameterization of conditions. Finding integrands functions in the calculation algorithm allows obtaining a stable computational algorithm of the proposed propagation model of fine suspended particles. The solution of the function implemented in the Mathcad Prime 7 software. Distributions of concentrations and their levels for various values of turbulence of atmospheric air and dangerous wind speed are received. The most significant number of fine particles is at a distance of up to 4 km from the emission source. Still, there is also the transfer of contaminants at more than 5 km (up to 57 % of the initial emission concentration). The model has convenient software and algorithmic software, the time of calculation of graphic visualizations up to 20 minutes on medium-power computers. The obtained mathematical model can use in systems of forecasting man-caused load on the environment for the prompt solution of environmental problems.Item Distribution of the Dispersed Phase in the Gas Cleaning Equipment with Pulsating Plug(Institute of Power Engeneering, 2021) Козій, Іван Сергійович; Козий, Иван Сергеевич; Kozii, Ivan Serhiiovych; Пляцук, Леонід Дмитрович; Пляцук, Леонид Дмитриевич; Pliatsuk, Leonid Dmytrovych; Гурець, Лариса Леонідівна; Гурец, Лариса Леонидовна; Hurets, Larysa LeonidivnaThe work is devoted to the reduction of the technogenic impact on the environment from the emissions of heat power engineering by using highly efficient equipment for the complex purification of exhaust gases — equipment with a regular pulsating plug (RPP). The aim of the study is the physical and mathematical description of the mechanisms of the process of capturing fine dust in equipment with an on-load tap changer. This goal is achieved by describing the physical picture of the dust collection process in experimental equipment with an on-load tap-changer; mathematical description of the condensation capture of fine dust; descriptions of the process of droplet distribution in the layer of turbulizing packing elements during upward movement of phases. As a result of calculations, an equation was obtained for determining the radius of a particle in the process of condensation of a vapor-gas-liquid system, which allows one to determine the further possibility of trapping particles due to the inertial or turbulent-diffusion mechanism in the device. An equation is obtained for calculating the diameter of liquid droplets formed during the crushing of liquid flows by turbulizing packing elements, which allows us to conclude that the phase contact surface is developed due to the pulsating movement of packing elements. Studies of the equipment with an on-load tapchanger allow us to speak about the possibility of its use for the complex cleaning of dust and gas emissions from heat power enterprises in order to reduce the negative impact on the environment.Item Mathematical Modeling of Nutrient Release from Capsulated Fertilizers(Budapest University of Technology and Economics, 2020) Вакал, Вікторія Сергіївна; Вакал, Виктория Сергеевна; Vakal, Viktoriia Serhiivna; Павленко, Іван Володимирович; Павленко, Иван Владимирович; Pavlenko, Ivan Volodymyrovych; Вакал, Сергій Васильович; Вакал, Сергей Васильевич; Vakal, Serhii Vasylovych; Гурець, Лариса Леонідівна; Гурец, Лариса Леонидовна; Hurets, Larysa Leonidivna; Ochowiak, M.The article is devoted to the study of reducing the technogenic load from high-dose nitrogen pollution of the soil layer by encapsulating granules of nitrogen fertilizers in slowly soluble phosphate-containing membranes. The process of dissolving and washing out of the primordial soil layer of the nutrients from urea, encapsulated by super phosphate shells in soil columns, was studied according to agrochemical techniques. The purpose of the work is to determine the parameters of the investigated process, based on which the previously developed physical model of soil washing of moving nitrogen forms, based on experimental data. The process of changing the loss of nitrogen from the soil when using different types of fertilizers depending on the amount of washing was studied by simulation. Mathematically, the process is described in general terms as a linear differential equation of the first order in partial derivatives. The solution of the equation under the initial and boundary conditions allowed to calculate the parameters of the model describing the nature of changes in the losses of nitrogen from the soil column. Comparison of calculated and experimental data showed a coincidence of values with a correlation coefficient above 0.96 for investigated nitrogen fertilizers with different composition of the phosphate-containing coating.Item Determining the effect of anthropogenic loading on the environmental state of a surface source of water supply(Technology Center, 2020) Ponomarenko, R.; Пляцук, Леонід Дмитрович; Пляцук, Леонид Дмитриевич; Pliatsuk, Leonid Dmytrovych; Гурець, Лариса Леонідівна; Гурец, Лариса Леонидовна; Hurets, Larysa Leonidivna; Grigorenko, N.; Sherstiuk, M.; Miakaiev, O.At present, even for a fairly large surface water object, the effectiveness of the forecasting models of water qualitative composition is largely determined by the completeness and adequacy of the source information. A review of approaches to using such models is given in scientific papers [1, 2]. Traditional forecasting methods, developed for using modern information and computing tools, are typically not effective in solving complex practical tasks on forecasting the state of a specific water object, taking into consideration all its features.