Перегляд за Автор "Yeshchenko, Oksana"

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Forecasting of performance parameters of the sugar house in the sugar factory
(1999) Mironchuk, Valeriy; Gulyy, Ivan; Shtangeeva, Nadiya; Yeshchenko, Oksana
The universal model of the multistage sugar crystallization has been developed which permits to simulate the multistage crystallization process with the help of the computer with the sufficient degree of detail and sequence sharply corresponding to the real industrial process. The proposed universal model of the sugar crystallization process allows to forecast the parameters of the performance of the sugar house in the sugar factory. The investigations carried out have demonstrated the advantage of the sugar crystallization schemes with the recirculation.
Optimization of the technological process of flax seed germination
(2019) Kraevska, Svitlana; Yeshchenko, Oksana; Stetsenko, Natalia
A mathematical model of the flaxseed germination process was constructed using the regression and correlation analysis methods. The model obtained determines the optimum germination modes. In the course of the experimental research, we applied experimental design techniques and mathematical processing of the experimental data. Using the computer programmes MathCad and. Microsoft Excel optimized the flax seed germination and set its optimum modes. The constructed mathematical model makes it clear that the maximum germination energy 99.64% is achieved at the temperature 27.5°C and humidity 95%. The experimental and statistical models of germination of flax seeds have been obtained,describing the process with the correlation coefficient R = 0.96–0.99.The data obtained can be used to predict the quality parameters of flax seedlings and the energy consumption to obtain them. Було побудовано математичну модель процесу пророщування насіння льону з використанням методіврегресійного та кореляційного аналізу. За допомогою отриманої моделі визначено оптимальні режими пророщування.Під час проведення експериментальних досліджень застосовувались методи планування експерименту і математичної обробки експериментальних даних. За допомогою комп’ютерних програм MathCad та Microsoft Excel проведено оптимізацію процесу пророщування насіння льону та встановлено оптимальні режими. З побудованої математичної моделі випливає, що максимальна енергія проростання 99,6% досягається при температурі 27,5°С та вологості 95%.Отримані експериментально-статистичні моделі процесу пророщування насіння льону описують перебіг процесу з коефіцієнтом кореляції R = 0,96-0,99, і можуть бути використані для прогнозування якісних показників готового напівфабрикату й енерговитрат на його отримання.
Sucrose cooling crystallization modeling
(2013) Mironchuk, Valeriy; Yeshchenko, Oksana; Samilyk, Marina
Based on the material balance equations and understanding of the final-grade massecuite cooling crystallization process as the technology object, a simulation model of the process has been built by which the computational experiments have the computational experiments. By results of these experiments, analytical exponential dependences of the massecuite characteristics change during cooling crystallization have been obtained, namely, grain content, weight, purity and dry solids weight ratio of massecuite syrup. The constructed model has been used to study the industrial cooling crystallization process. It is proved that the results of the experiment of the developed simulation model fully reflect the nature of the industrial process of final-grade massecuite cooling crystallization of sucrose. Typical scheme industrial cooling crystallization with massecuite water or impure sugar solution dilution and authors’ scheme with an intermediate heat massecuite have been considered. It’s experimentally shown that the use of final-grade massecuite intermediate heating after cooling to 50-52 ºC by 7-10 ºC increases the effect of crystallization to 8.4% by reducing the viscosity of massecuite syrup, the surface tension and alignment of the massecuite cooling rate at sucrose crystalization rate. Consequently, the exclusion of dilution of massecuite by water or impure sugar solution and its replacement by intermediate heating provides a more complete depletion of molasses and increases the amount sugar grains in the massecuite.