Статті
Постійне посилання на розділhttps://dspace.nuft.edu.ua/handle/123456789/7372
Переглянути
9 результатів
Результати пошуку
Документ Formation of suspension structure in the process of grinding in bead mills(2020) Hrininh, Kateryna; Gubenia, Oleksii; Telychkun, YuliiaIt has been investigated the rheological properties of the suspension of farmaceutical and cosmetics preparates during grinding at an experimental laboratory bead mill of periodic action. The rheological characteristics have been investigated on a rotary viscometer Reotest 2. as a result of the research, the flow curve of the suspension during grinding has been constructed and it has been found that within the investigated range the product does not change the character of flow regardless of measurement time and temperature. Analysis of the curve of the suspension during grinding revealed features which explain formation of the structure. The dependence of the effective viscosity on the shear rate during grinding of the suspension is polynomial and confirms the non Newtonian character of the product and is defined as a linear plastic body. The investigated finished product has 6.5 time’s higher viscosity in relation to pure castor oil, which is explained by the high dry matter content (40 %) and the increase in the newly formed area. The viscosity of the suspension varies depending on the temperature: cooled to 20 °C, the finished product has a viscosity of 22.5% higher than immediately after the grinding process with a temperature of 34 °CДокумент Modeling of the process of kneading the yeast dough by modern working elements(2019) Rachok, Vitalii; Telychkun, Volodymyr; Telychkun, YuliiaThe scheme of the mathematical modeling of the process of mixing of the yeast dough in a dough machine of continuous action is developed. Based on the results of simulation of the mixing process, cam operating elements, the distribution of strain of displacement and dissipation of yeast dough in the working chamber were obtained. As the angle of the position of the cam element increases on the shaft, there is an increase in the shear stress. The greatest indices of shear stress occur in the area of cam clamping elements and in the contact area of the cam with the walls of the case, numerical values reach within 7000-8000 Pa. For the rest of the camera, the displacement stress reaches 1000-3000 Pa. Distribution of dissipation shows that in parts of the working chamber here is the formation of heat in the area of flow. With the increase of the angle of the cam of the cam element, there is a gradual increase in temperature. At the site of mixing 12 pairs of cams, the temperature of the yeast dough increases by almost 5° C. Taking into account that before the simulation, the initial temperature reached t=30° C, and upon completion of the mixing process did not exceed 35° С, the pastry preparation parameters were observed. The greatest heat release occurs in the area of the cam clamping elements. The results of mathematical modeling are confirmed by physical experiments on a test dough mixing machine of continuous action, an error within 5%Документ Assessment of energy expenditure on the kneading wheat dough process(2019) Telychkun, Volodymyr; Damyanova, Stanka; Anisimov, Andrii; Telychkun, YuliiaA quantitative assessment of the quality of the process of k neading the dough in the dough machines, of both periodic and continuous this is the total and specific energy expenditure. Determination of energy expenditure is necessary for the calculation of the dough machine as well as the energy analysis of specific stages of the process. Studies were conducted on a laboratory kneading machine of periodic action. To measure the energy expenditure used wattmeter. An analysis of the experimental data showed how energy expenditure varied throughout the experiment and confirmed three stages of the kneading wheat dough process. Comparing the calculated theoretical values with the obtained experimental values, they were found to be different. Studies of the process of kneading wheat dough prove the need for changes in the method of calculating energy expenditure for kneading, eliminating the formal approach to this process and taking into account the energy expenditure of structural transformations.Документ Vacuum cooling of biscuit semi-finished products(2019) Desyk, Mykola; Telychkun, Volodymyr; Telychkun, YuliiaThe paperreviews advanced cooling method of biscuit semi-finished products under vacuum. It is established that the duration of cooling of biscuit products is reduced from 30-40 minutes to a few minutes, at cooling with a temperature of 20ºС and relative humidity φ 75%. Also there is no need to use its standing. The influence of the regime parameters of the vacuum cooling on humidity, temperature and structural -mechanical parameters of biscuit semi-finished products has been investigated. During storage of finished biscuit products for 72 hours, the loss of moisture by blanks cooled by vacuum evaporation method was 0.7% less than the cooled by convection method and after standing for 8 hours. Pressure plays an important role in the quality of the cookie semi-finished product. In particular, reducing the pressure under dilution conditions to 3 kPa leads to a decrease in the cooling temperature of the finished biscuit semi-finished product to 24 ° C, reducing the time during which it cools from 480 to 2-5 minutes, increasing the elastic deformation by stabilizing the structure of the finished product. Samples cooled by the vacuum evaporation method had better structural and mechanical quality indicators compared to the samples cooled by the convection method and after standing for 8 hoursДокумент Modelling of Process in Twin-Screw Dough-Mixing Machines(2014) Kudinova, Alexandra; Kravchenko, Alexander; Litovchenko, Igor; Telychkun, Yuliia; Gubenia, Oleksii; Telychkun, Volodymyr; Dovgun, IrinaTo intensify the machining test during mixing, we suggested to use a screw as the working part of various modifications, which provide continuous transportation and intensive mechanical impact on the dough during kneading. A design model using software package Flow Vision is offered to study the process of kneading.Документ Perfection of equipment for improvement of dough semi finished(2014) Kravchenko, Alexander; Telychkun, Yuliia; Telychkun, VolodymyrНеобхідність комплексного удосконалення процесу виробництва хлібобулочних виробів випливає з широкого використання ручної праці, громіздкого обладнання при традиційному способі виробництва. Конструкція змішувально-бродильно-формувального агрегату дозволяє об'єднати процеси безперервного інтенсивного замішування тіста, бродіння та формування розрихлених тістових заготовок безпосередньо на під хлібопекарської печі. Агрегат забезпечує скорочення машино-апаратурної схеми і знижує витрати на експлуатацію обладнання. The necessity of complex perfection of process of production of rusk warest comes up from the traditional method of production, wide usage of hand labour and bulky equipment. Design of mixing-fermentation-forming unit, which allows to combine the processes of continuous intensive dough mixing, aerated dough pieces fermentation and formation directly to the baking plate. The unit provides a reduction in car-hardware circuits and reduces the cost to operate the equipment. Viscosity of the dough is decreasing while the intensity of machining is increasing due to the weakening of connections between the particles of the dough.Документ Perspective direction of complex improvement of rusk wares(2013) Telychkun, Yuliia; Telychkun, Volodymyr; Desyk, Mykola; Kravchenko, Alexander; Marсhenko, A.; Birca, Adriana; Stefanov, StefanThe necessity of complex perfection of process of production of rusk warest comes up from the raditional method of production, wide usage of hand labour and bulky equipment. The process of mixing of dough, treatment of dough purveyances, baking and drying is investigational by us. It is set that the intensive mixing of dough allows to shorten duration of his fermentation, the using of dynamic method of loosen of dough purveyances and combined process of baking baking-drying . On the basis of the conducted researches the machine-instrumental chart of the complex stream-mechanized line of production of rusk wares is offeredДокумент The research of the gas-filled dough rheological characteristics(2010) Telychkun, Yuliia; Telychkun, Volodymyr; Taran, Vitaly; Gubenia, Oleksii; Desyk, MykolaWe explored reological descriptions of yeast dough , which filled with carbon dioxide. For researches the methods of capillary viscometery are used. Dependence of tension on speed of change is got at different content of gas phase, and dependence of effective viscidity on speed of change.Документ The mathematical simulation of heat-mass transfer in bread baking process(2012) Telychkun, Volodymyr; Shtefan, Yevgenii; Telychkun, YuliiaThe problem of mathematical model designing of the heat-mass transfer in bread baking is considered. The analytical part of mathematical model (analytical model) is submitted. The mathematical model is focused on the computer technologies using. Проблема розробки математичної моделі тепломасообміну в випічці хліба вважається важливою. Представляється в аналітичній частині математичної моделі (аналітична модель). Математична модель орієнтована на використання комп'ютерних технологій.