SIMULATION OF HEAT EXCHANGE PROCESSES IN ROTARY SEED DRYER
Abstract
An important technological operation that ensures the formation of high-quality seed material is drying. This technological operation must have precise temperature modes of operation. It is also necessary to take into account the peculiarities of agricultural material. During post-harvest processing, the deviation from the set parameters leads to a decrease in the quality of raw materials. A set of studies is systematized to find ways to develop energy-saving drying methods. These studies were carried out by the Department of Agricultural Engineering named after Professor H. A. Hylis. Means that intensify the drying process are proposed. They are based on taking into account the properties of the seed material. This material is heat treated. The proposed design of a rotary dryer for loose agricultural seed materials with a spiral perforated surface of the drying chamber. Mathematical modeling of heat and mass transfer processes was performed to optimize the parameters of the drying unit. The seed material is dried on a spiral surface and mixed. The drying process will be represented by a sectional cascade type scheme with cross movement of the drying agent and seed material. The mathematical description of heat and mass transfer processes is presented by the microkinetic method. Its essence is the solution of the interaction model of flows of dispersed material and drying agent. The material is mixed within the sections. The kinetic regularities of a group of particles are characterized by the average value of temperature and humidity by volume. The results of the simulation, carried out in the form of a numerical experiment, are presented in graphic form.
References
Bandura, V., Kalinichenko, R., Kotov, B., & Spirin, A. (2018). Theoretical rationale and identification of heat and mass transfer processes in vibration dryers with IR-power supply. Eastern European Journal of Enterprise Technologies, 4/8(94), 50-58. https://doi.org/10.15587/1729-4061.2018.139314
Didukh, V. F. (2002). Increasing the efficiency of drying agricultural plant materials (Підвищення ефективності сушіння сільськогосподарських рослинних матеріалів). Lutsk: LNTU. (in Ukrainian).
Dudarev, I. M. (2007). Justification of the technological process and parameters of the flax dryer in rolls (Обґрунтування технологічного процесу та параметрів сушарки льоносировини в рулонах) [PhD dissertation]. National Scientific Center «Institute of Mechanization and Electrification of Agriculture», Hlevakha. (in Ukrainian).
Elenkov, V. (1988). Drying and drying equipment. Sofia: Zemizdat.
Gaivas, B. (2010). Mathematical modeling of convective drying of materials taking into account mechano-thermo-diffusion processes (Математичне моделювання конвективного сушіння матеріалів з урахуванням механотермодифузійних процесів). Physico-mathematical Modeling and Information Technologies, 12, 9-37. (in Ukrainian).
Kopets, К. Y. (2016). Development and substantiation of the parameters of the device for preparing soybeans for drying (Розробка та обґрунтування параметрів пристрою підготовки зерен сої до сушіння) [PhD dissertation]. Lviv National Agrarian University, Lviv. (in Ukrainian).
Pakowski, Z., & Mujumdar, A. S. (1987). Basic process calculations in drying. Handbook of industrial drying. Montreal: Marcel Dekker.
Panasyuk, S. H. (2008). Justification of the parameters of the technological process of drying corn cobs (Обґрунтування параметрів технологічного процесу сушіння качанів кукурудзи) [PhD dissertation]. Vinnytsia State Agrarian University, Vinnytsia. (in Ukrainian).
Podoliak, V. M. (1999). Improvement of the process of drying a heap of flax in a fixed thick layer (Вдосконалення процесу сушіння вороху льону в нерухомому товстому шарі) [PhD dissertation]. Луцький державний технічний університет, Луцьк. (in Ukrainian).
Shvidia, V. (2022). Mathematical modeling of heat and mass transfer in the process of drying seeds of agricultural crops in vacuum conditions (Математичне моделювання тепломасообміну в процесі сушіння насіння сільськогосподарських культур в умовах вакууму). Mehanization and Electrification of Agricultural, 95-101. https://doi.org/10.37204/0131-2189-2022-15-11 (in Ukrainian).
Yashchuk, А. A. (2014). Justification of the parameters of the linseed dryer (Обґрунтування параметрів сушарки насіння льону олійного) [PhD dissertation]. Kirovohrad National Technical University, Kirovohrad. (in Ukrainian).
Zabrodotska, L. Y. (2012). Justification of the technological process and parameters of the grass seed pile dryer (Обґрунтування технологічного процесу та параметрів сушарки вороху насіння трав) [PhD dissertation]. Kirovohrad National Technical University, Kirovohrad. (in Ukrainian).
