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Information × Registration Number 0218U006308, 0114U005546 , R & D reports Title Fire resistance of engineering structures under fire at petrochemical plants popup.stage_title Head Semerak Mykhajlo Mykhajlovych, Доктор технічних наук Registration Date 17-04-2018 Organization L'viv Fire State University of Vital Activity Safety popup.description2 Report on the research work: 60 p., 31 fig., 8 tab., 30 sources. The object of the study is nonstationary thermal processes in the construction of vertical steel tanks, which occur as a result of the action of thermal factors of fires in storage tanks of oil and oil products storage. The subject of the study is the influence of non-stationary thermal processes in vertical steel tank structures that occur as a result of the thermal factors of fires in storage tanks of oil and oil products storage and their integrity. The purpose of this work is to identify the peculiarities of the influence of non-stationary thermal processes in the designs of vertical steel tanks that occur as a result of the influence of thermal factors of fires on them, on their integrity. On the basis of mathematical modeling of the fire process, a method for determining the heat fluxes, depending on the flame temperature, the geometric dimensions of the tanks and the distance between them, has been developed. A technique for determining the temperature field in the reservoir wall is developed, heated from the heat flux of the fire flame, taking into account the time variation of the heat flow and the change in the thermophysical characteristics as a function of temperature. This made it possible to establish that the time interval for heating the reservoir to a critical temperature of 550 °C is 40 ... 86% more than when calculated with a constant flow and temperature-independent thermophysical characteristics. By mathematical modeling of the heat exchange process in a group fire in a tank farm with the use of the energy equation of the radiant heat exchange and the equation of nonstationary thermal conductivity, the finite element method reveals the regularities of heating the walls of a tank with oil, depending on the degree of its filling, the type of fuel and the distance between the tanks. The most dangerous location of the reservoir relative to the reservoirs is revealed, they are burning. Constructed regression dependences of the maximum temperatures of the internal surfaces of reservoirs that contact the oil. The resulting regression relationships can be used in the design of reservoir parks, taking into account the diameter of the tanks and the distance between them. Key words: vertical steel tanks, non-stationary thermal process, thermal factor, fire, integrity. Product Description popup.authors Байтала Володимир Михайлович Михайлишин Микола Романович Харишин Дем'ян Васильович Чернецький Володимир Володимирович popup.nrat_date 2020-04-02 Close