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https://ela.kpi.ua/handle/123456789/43251
У зібранні розміщено матеріали, що опубліковані або готуються до публікації в наукових журналах та збірниках.

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  • Ескіз
    ДокументВідкритий доступ
    Mathematical Model of Heat Transfer Process of Production of Granulated Fertilizers in Fluidized Bed
    (Asian Research Publishing Network (ARPN), 2021) Korniyenko, Bogdan Y.; Ladieva, Lesya R.; Galata, Liliya P.
    A mathematical model of heat exchange of the process of production of granular fertilizers in the fluidized bed was developed. The mathematical models of the fluidization and granulation process in the fluidized bed are analyzed. The main processes affecting the production of granular mineral fertilizers - heat exchange, mass transfer, vaporization, crystallization - are determined. Transient characteristics of air temperature, temperature of granules and moisture content of granules were obtained. The computer experiment confirmed the adequacy of the proposed mathematical model of the process of production of granular mineral fertilizers in the fluidized bed. The main characteristics that affect the production of pellets in a fluidized bed are air temperature and pellet temperature. To obtain a fertilizer of a given quality, it is necessary to control the moisture content of the granules. The proposed mathematical model of heat transfer of the process of production of granular fertilizers in the fluidized bed together with the controller can be used to build an automated process control system.
  • Ескіз
    ДокументВідкритий доступ
    Parametric identification of the process of contact membrane distillation
    (Asian Research Publishing Network (ARPN), 2019) Zhulynskyi, Aleksandr; Ladieva, Lesya; Korniyenko, Bogdan
    The mathematical model of the contact membrane distillation process has such an unknown parameter as the membrane permeability coefficient. The coefficient of permeability of the membrane takes into account not only the transfer of heat with the vapor through the pores of the membrane, but also through the polymer structure. In order to determine the coefficient of permeability, which is represented by variables along the length of the channel and in time, methods of the theory of optimal control were applied. An algorithm for identifying variable length and time permeability coefficient is developed. The application of the initial approximation ensures the convergence of the algorithm in the fourth iteration of the gradient procedure. The refined mathematical model of the contact membrane distillation process can be used in control tasks.