Synelnikov Oleksandr

@ldubgd.edu.ua

Associate Professor of the Department of Civil Protection at the Faculty of Civil Protection
Lviv State University of Life Safety

Synelnikov Oleksandr


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https://researchid.co/o.synelnikov
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Scopus Publications

Scopus Publications

  • SUBSTANTIATING THE PARAMETRIC TEMPERATURE MODE DURING A FIRE ON TRANSFORMERS PLACED INSIDE PROTECTIVE STRUCTURES
    Roman Palchykov, Yaroslav Ballo, Vadym Nizhnyk, Viktor Mykhailov, Andrii Gavryliuk, et al.
    Eastern European Journal of Enterprise Technologies, 2024
    The object of this study was the change in temperature during a fire on transformers located in protective structures. Investigating the change in temperature during a fire on transformers located in protective structures is one of the priority tasks for protecting the economy and national security of the country. The studies solved the problem of fire resistance of the enclosing structures of protective structures in which the transformer is located. The fire resistance of enclosing structures has been confirmed by meeting the conditions related, in particular, to the calculated value of the critical temperature of the material. The selection of the calculation scenario for investigating the temperature regime during a fire on a transformer located in a protective structure was carried out according to two scenarios of the occurrence and spread of fires. The study demonstrated temperature changes in the protective structure during the burning of the transformer based on data of the temperature sensor installed at heights of 1 m, 10 m, and 18 m above the place of occurrence of combustion. Certain conditions were taken into account for the calculation scenarios of the spread of fire and changes in the temperature effect on building structures. Cases when an automatic water fire extinguishing system is functioning and not functioning in the protective structure were taken into account. In order to substantiate the temperature regime during a transformer fire, the conditions of the greatest impact of temperature on building structures were adopted. The following conditions were accepted: there is no automatic fire extinguishing system in the protective room; temperature sensor readings were located at a level of 18 m from the floor level of the protective structure. The calculation of the temperature regime during a transformer fire, which is located in the protective structure, was carried out using a field model, employing the reaction of simple stoichiometry (transformer oil can contain only carbon, hydrogen, oxygen, and nitrogen atoms). Based on the results of this study, a modified temperature regime during a fire on transformers located in protective structures was substantiated. The maximum temperature range for a developed fire was from 900 °C to 1100 °C. A standardized time (up to 30 minutes) has also been established during which the building structures of protective structures must withstand the effects of the modified temperature regime
  • Analysis of sorption of vehicle liquids with sand that appear after car accidents reproduced in laboratory scale
    Andrzej Polanczyk, Małgorzata Ciuka-Witrylak, Oleksandr Synelnikov, Vasil Loik
    Matec Web of Conferences, 2018
    Introduction: Increasing number of vehicles corelates with an increase in car accidents’ risk which pose a threat of environment contamination. Therefore, this study was undertaken to analyze the sorption process for two vehicle fluids contacted with sand. Methods and findings: Sorption process was analyzed with the use of dedicated experimental set-up in the laboratory scale. Contact of sand (50cm3) with 100cm3 of two sorbates (brake fluid-BF and diesel-D) with the following properties: pure BF, pure D, 0.75-BF and 0.25-D, 0.5-BF and 0.5-D, 0.25-BF and 0.75-D were investigated. Finally, non-linear regression for the mathematical description of sorption process was prepared. The results indicated that the higher amount of D in mixture the higher absorption of sorbate by sand. Moreover, the highest sorption was recorded for pure BF and the lowest for the mixture of equal amount of BF and D. Furthermore, analysis of absorbed mixtures volume indicated that for the composition of 0.25-BF and 0.75-D, 29ml of liquid was absorbed. While, for the equal amount of brake fluid and diesel 30ml of liquid was absorbed. Finally, for the composition of 0.75-BF and 0.25-D, 27ml of liquid was absorbed.
  • Thermoelastic state of a half-space with an edge crack under local heating conditions
    V.M. Zelenyak, L.I. Kolyasa, V.B. Loik, O.D. Synelnikov
    Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 2018
    1 ‒ Lviv Polytechnic National University, Lviv, Ukraine, email: kolyasa.lubov@gmail.com 2 ‒ Lviv State University of Life Safety, Lviv, Ukraine V. M. Zelenyak1, Cand. Sc. (Tech.), Assoc. Prof., orcid.org/0000-0002-6653-4326, L. I. Kolyasa1, Cand. Sc. (Phys.-Math.), orcid.org/0000-0002-9690-8042, V. B. Loik2, Cand. Sc. (Tech.), orcid.org/0000-0002-3772-1640, O.D. Synelnikov2, Cand. Sc. (Tech.), orcid.org/0000-0002-0429-147X
  • Production of renewable energy resources via complex treatment of cyanobacteria biomass
    Myroslav Malovanyy, Volodymyr Nikiforov, Olena Kharlamova, Olexander Synelnikov, and
    Chemistry and Chemical Technology, 2016
    The process of cyanobacteria complex treatment via obtaining of inedible fat, suitable for the production of biodiesel and biogas has been investigated. The prospective application of hydrodynamic cavitation to increase the efficiency of inedible fat extraction and biogas synthesis is shown. A comprehensive strategy for the cyanobacteria use in the energy and agricultural technologies is suggested.