Issue №: 1(116)
The journal solves the problems of creation and improvement of machinery and technologies for agriculture: 131 - Applied Mechanics, 132 - Materials Science, 133 - Industrial Engineering, 141 - Power Engineering, Electrical Engineering and Electromechanics, 208 - Agricultural Engineering.
SIMULATION OF HEAT AND MASS EXCHANGE PROCESS HEAT EXCHANGER OF SIDE-EVAPORATIVE TYPE
Grygorii Kaletnіk – academician of the NAAS of Ukraine, Doctor of Economics, Professor, Head of the Department of Administrative Management and Alternative Energy Sources of Vinnitsa National Agrarian University (Soniachna Str., 3, Vinnitsa, Ukraine, 21008, e-mail: rector@vsau.org, https://orcid.org/0000-0002-4848-2796).
Vitalii Yaropud – Candidate of Technical Sciences, Associate Professor of the Department of machinery and equipment for agricultural production of Vinnytsia National Agrarian University (St. Soniachna, 3, Vinnytsia, Ukraine, 21008, e-mail: yaropud77@gmail.com, https://orcid.org/0000-0003-0502-1356).
It is known that the share of influence of the microclimate on the productivity of animals is about 20-25%. In the process of life, animals emit a large amount of heat, moisture, harmful gases, including carbon dioxide, ammonia and hydrogen sulfide. If the ventilation system does not work satisfactorily, the concentration of water vapor and harmful gases may exceed the standards, as a result of which animals drastically reduce productivity and may die. Currently, when creating livestock enterprises, it is necessary to resolve issues related to the reduction of investments, 40% of which is equipment. More than 20% of the cost of equipment falls on the heating and ventilation system; it is on it that they most often try to save money. Disagreements often arise between specialists on the deviation of microclimate parameters from optimal values for the productive qualities of farm animals.
The article presents the physical and mathematical apparatus and methods for simulating the process of heat and mass transfer in an indirect-evaporative type heat exchanger for livestock buildings. The description of the process of heat and mass transfer in the heat exchanger of the indirect evaporative type of the Maisotsenko cycle is complex and requires the solution of many important mathematical problems (for example, the algorithmic solution of the combined heat and mass transfer on the surface with existing walls). Of particular importance is the development of an efficient algorithm that allows one to calculate differential equations of heat and mass transfer in partial derivatives. Therefore, the aim of the research is to describe the physical and mathematical apparatus and simulation technique (numerical simulation) of the heat and mass transfer process in an indirect evaporative type heat exchanger. As a result of analytical studies, the physico-mathematical apparatus of the process of heat and mass transfer in the heat exchanger of the indirect evaporative type of the Maisotsenko cycle was compiled, including the energy balance equation, taking into account sensitive and latent heat transfer on the surface of the wall of the wet and dry channels. The initial and limiting conditions of the heat and mass transfer model in the working part of the evaporative cooler under study are determined, which form the basis of numerical simulation in the Star CCM+ software package. A simulation technique (numerical modeling) has been developed and preliminary studies of the heat and mass transfer process in the heat exchanger of the indirect evaporative type of the Maysocenka cycle have been carried out. As a result of numerical simulation, the distributions of the temperature field, the vector field of velocities and the absolute humidity of the air flow in the heat exchanger of the indirect evaporative type of the Maysocenka cycle were obtained.
[1] Kaletnik, G.M. (2019). Perspektyvy pidvyshchennya enerhetychnoyi avtonomiyi pidpryyemstv APK v ramkakh vykonannya enerhetychnoyi stratehiyi Ukrayiny [Prospects for increasing the energy autonomy of agricultural enterprises in the framework of the energy strategy of Ukraine]. Bulletin of Agrarian Science of the Black Sea Region. 4. 90–98. [in Ukrainian].
[2] Kaletnik, G.M., Honcharuk, I.V. (2020). Ekonomichni rozrakhunky potentsialu vyrobnytstva vidnovlyuvalʹnoyi bioenerhiyi u formuvanni enerhetychnoyi nezalezhnosti ahropromyslovoho kompleksu [Economic calculations of the potential of renewable bioenergy production in the formation of energy independence of the agro-industrial complex]. Economics of agro-industrial complex. 2020. 9. 6–16. DOI: 10.32317/2221-1055.202009006. [in Ukrainian].
[3] Duan, Z., Changhong, Z., Zhang, X., Mustafa, M., Alimohammadisagvand, B., Hasan, A., Zhao, X. (2012). Indirect evaporative cooling: Past, present and future potentials. Renewable and Sustainable Energy Reviews. 2012. 16: 6823–6850. [in English].
[4] Riangvilaikul, B., Kumar, S. (2010). An experimental study of a novel dew point evaporative cooling system. Energy Buildings. 42: 637–644. [in English].
[5] Pryshlyak, V.M., Yaropud, V.M. (2014). Analiz i klasyfikatsiya tekhnolohichnykh skhem teploutylizatoriv dlya tvarynnytsʹkykh prymishchen. Scientific and theoretical collection «Bulletin of ZhNAEU». 2(45), t. 4. p. ІІ. 344–350. [in Ukrainian].
[6] Yaropud, V.M. (2020). Doslidzhennya protsesu funktsionuvannya ta optymizatsiya konstruktyvno-tekhnolohichnykh parametriv trytrubnoho rekuperatora. Machinery, energy, transport of agro-industrial. 1 (108). 142–150. DOI: 10.37128/2520-6168-2020-1-16. [in Ukrainian].
[7] Yaropud, V. (2021). Analytical study of the automatic ventilation system for the intake of polluted air from the pigsty. Scientific horizons. 24 (3). 19–27. DOI: 10.48077/scihor.24(3).2021.19-27 [in English].
[8] Kaletnik, G.M., Yaropud, V.M. (2021). Fizyko-matematychna modelʹ ventylyatsiynoyi systemy nahnitannya chystoho povitrya u tvarynnytsʹkykh prymishchennyakh. Machinery, energy, transport of agro-industrial. 3 (114). 4–15. DOI: 10.37128/2520-6168-2021-3-1 [in Ukrainian].
[9] Kaletnik, G.M., Yaropud, V.M. (2021). Teoretychni doslidzhennya pnevmovtrat povitryanoho teploobminnyka pobichno-vyparnoho typu tvarynnytsʹkykh prymishchen. Machinery & Energetics. Journal of Rural Production Research. Kyiv. 12 (4). 35–41. [in Ukrainian].
[10] Agency, I.E. (2013). Transition to Sustainable Buildings: Clean Energy Solutions Center Book Launch. [in English].
[11] Anisimov, S., Pandelidis, D. (2015). Theoretical study of the basic cycles for indirect evaporative air cooling. International Journal of Heat and Mass Transfer. 84: 974–989. [in English].
[12] Gillan, L. (2008). Maisotsenko cycle for cooling process. Clean Air. 9: 1–18. [in English].
[13] Maisotsenko, V., Gillan, L. Gillan, A.H.T. (2000). Method and plate apparatus for dew point evaporative cooler. USA Patent US 7197887 B2. [in English].
[14] Elberling, L. (2006). Laboratory Evaluation of the Coolerado Cooler-Indirect Evaporative Cooling Unit. Pacific Gas and Electric Company (Report). [in English].
[15] Zhan, C., Zhao, X., Smith, S., Riffat, S.B. (2011). Numerical study of a M-Cycle cross-flow heat exchanger for indirect evaporative cooling. Building and Environment. 46: 657–668. [in English].
[16] Tertipis, D. (2014). Modelling and experimental evaluation of evaporative cooling systems, Athens, Greece. Thesis submitted to the University of Athens for the degrees of Doctor of Philosophy. [in English].
About the journal
G8 – Materials Science
G9 – Applied Mechanics
G10 – Metallurgy
G11 – Mechanical Engineering (by specializations)
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
The All-Ukrainian scientific journal “Technology, energy, agriculture transport AIC” is an open-access scientific publication that publishes the results of original research, theoretical and applied developments, as well as scientific papers in the fields of engineering sciences, energy systems, and transport technologies of the agro-industrial complex.
The main objective of the scientific journal “Technology, energy, agriculture transport AIC” is to disseminate the results of modern scientific research and to promote the development of technical, energy, and transport solutions for the agro-industrial complex through the publication of scientific materials characterized by scientific novelty and practical significance in the field of design and modernization of machinery, equipment, and technologies.
The journal’s activities are focused on supporting the development of engineering science, stimulating the implementation of innovative approaches into industrial practice, as well as ensuring effective exchange of scientific achievements among researchers, educators, engineers, and other specialists in relevant fields.
Objectives of the Journal
To achieve its defined objective, the journal ensures the implementation of the following key tasks:
· publication of the results of fundamental and applied research covering the fields of applied mechanics, mechanical engineering, materials science, energy systems, electrical engineering, electromechanics, and transport systems of the agro-industrial sector;
· promotion of the implementation of advanced technical and technological developments aimed at improving the efficiency of machinery, equipment, and production processes;
· creation of conditions for active scientific exchange among research institutions, higher education institutions, industrial enterprises, and other interested organizations;
· support for the development of interdisciplinary research and expansion of cooperation among specialists in various fields of science and technology;
· promotion of the improvement of the scientific and technical level of research related to the design, modernization, and operation of technical equipment used in agro-industrial production;
· dissemination of information on modern achievements in science and technology and the implementation of innovative technologies in the fields of technical support, energy, and transport;
· development of a scientific information environment that facilitates effective scientific communication and the integration of national research into the international scientific community.
Publication frequency: 4 issues per year
Languages of publication: Ukrainian, English
Editor-in-Chief: Vitalii YAROPUD
State Registration: Decision of the National Council of Ukraine on Television and Radio Broadcasting № 1337 and № 1180. Media Identifier: R30-05173
EDRPOU Code: 00497236
Publisher ROR: https://ror.org/05m3ysc06
Publisher DOI Prefix: 10.37128
Technology, energy, agriculture transport AIC is a scholarly professional journal with a long-standing history and stable academic tradition, reflecting the evolution of engineering and technical sciences within the agro-industrial sector of Ukraine.
The journal was founded in 1997 under the title Bulletin of Vinnytsia State Agricultural Institute. According to the Resolution of the Presidium of the Higher Attestation Commission of Ukraine dated September 11, 1997, the publication obtained the status of a professional scientific journal, which enabled the publication of the main results of doctoral and candidate dissertations in technical sciences. From its inception, the journal positioned itself as an academic platform for addressing current issues of mechanization, electrification, and technical support of agricultural production. During 2001–2014, the journal was published under the title Proceedings of Vinnytsia National Agrarian University. Series: Technical Sciences (State Registration Certificate of Print Media KV No. 16644-5116 PR dated April 30, 2010). Throughout this period, a systematic approach to the selection and peer review of scientific manuscripts was established, the thematic scope of publications was expanded, and continuity of scientific directions as well as the development of sectoral engineering schools was ensured. Since 2015, the journal has been published under its current title, Technology, energy, agriculture transport AIC (State Registration Certificate No. 21906-11806 R dated March 12, 2016). The change of title reflected the expansion of the journal’s thematic coverage and its orientation toward interdisciplinary research in mechanical engineering, energy systems, electrical engineering, transport technologies, automation, and digital solutions for the agro-industrial complex.
