Issue №: 1 (132)
The journal presents the results of scientific research and addresses current issues in the development and improvement of agricultural equipment and technologies, particularly in the design, production, and operation of machines and technical systems in the agro-industrial complex, including aspects of their efficient functioning.
THEORETICAL STUDY AND MODELING OF AERODYNAMIC LOSSES IN THE CHANNELS OF AN INDIRECT EVAPORATIVE HEAT EXCHANGER
Grigorii KALETNІK – Doctor of Economic Sciences, Professor, Academician of the National Academy of Agrarian Sciences of Ukraine, Rector of Vinnytsia National Agrarian University (3 Soniachna St., Vinnytsia, Ukraine, 21008, e-mail: rector@vsau.org, ORCID 0000-0002-4848-2796).
Vitalii YAROPUD – Doctor of Technical Sciences, Associate Professor of the Department of Agricultural Machinery and Equipment, Dean of the Faculty of Engineering and Technology of Vinnytsia National Agrarian University (3 Soniachna St., Vinnytsia, Ukraine, e-mail: yaropud77@gmail.com, ORCID 0000-0003-0502-1356).
The article provides a theoretical substantiation of the aerodynamic characteristics of an indirect evaporative air heat exchanger operating according to the Maisotsenko thermodynamic cycle (M-cycle) and intended for microclimate control systems in livestock buildings. The study is motivated by increasing summer thermal loads, the limited performance of conventional direct adiabatic cooling, and the need to reduce ventilation energy use without increasing the humidity of supply air.
A design concept featuring cross-flow interaction of dry and wet air streams is proposed, enabling deep cooling to temperatures close to the ambient dew point. A comprehensive mathematical model for pressure-loss prediction in the heat exchanger channels is developed. The model is based on an analytical decomposition of the airflow path into characteristic sections and accounts for channel geometry, flow regime, and the equivalent roughness of wetted surfaces.
Numerical analysis establishes the influence of channel cross-sectional area, number of channels, and airflow velocity on total aerodynamic resistance and required fan power. The channel cross-sectional shape is shown to be a decisive factor for energy performance: for equal cross-sectional areas, circular channels reduce total pressure losses by up to 26% compared with square and triangular channels. The results can be used to optimize the design of indirect evaporative heat exchangers and to improve the energy efficiency of ventilation and air-conditioning systems in livestock buildings.
1. Renaudeau, D., Collin, A., Yahav, S., de Basilio, V., Gourdine, J. L., & Collier, R. J. (2012). Adaptation to hot climate and strategies to alleviate heat stress in livestock production. Animal, 6(5), 707–728. https://doi.org/10.1017/S1751731111002448 [in English].
2. Horobets, V. H., & Trokhaniak, V. I. (2017). Energy-efficient microclimate maintenance system in poultry buildings. Monograph. Kyiv: CP “Komprint”, 193 p. [in Ukrainian].
3. Mahmood, M. H., Sultan, M., Miyazaki, T., Koyama, S., & Maisotsenko, V. S. (2016). Overview of the Maisotsenko cycle – A way towards dew point evaporative cooling. Renewable and Sustainable Energy Reviews, 66, 537–555. https://doi.org/10.1016/j.rser.2016.08.022 [in English].
4. Zhan, C., Duan, Z., Zhao, X., Smith, S., Jin, H., & Riffat, S. (2011). Comparative study of the performance of the M-cycle counter-flow and cross-flow heat exchangers for indirect evaporative cooling – Paving the path toward sustainable cooling of buildings. Energy, 36(12), 6790–6805. https://doi.org/10.1016/j.energy.2011.10.019 [in English].
5. Dovhaliuk, V. B. (2015). Ventilation aerodynamics. Textbook. Kyiv: Ukrheliotekh, 366 p. [in Ukrainian].
6. Lee, S.-Y., Choi, L.-Y., Park, J., & Daniel, K. F. (2023). Evaluation of actual ventilation rates and efficiency in research-scale pig houses based on ventilation configurations. Animals, 13(15), 2451. https://doi.org/10.3390/ani13152451 [in English].
7. Boban, L., Miše, D., Herceg, S., & Soldo, V. (2021). Application and design aspects of ground heat exchangers. Energies, 14(8), 2134. https://doi.org/10.3390/en14082134. [in English].
8. Bezrodny, M., Prytula, N., & Oslovskiy, S. (2018). Thermodynamic efficiency of heat pump heating scheme using ground and sewage heat. Research Bulletin of NTUU "KPI", (1), 45–52. https://doi.org/10.20535/1810-0546.2018.1.111175 [in English].
9. Kravchenko, M. (2022). Temperature waves method for modeling regenerative heat exchangers. Journal of Chemistry and Technologies, 30(1), 73–82. https://doi.org/10.15421/jchemtech.v30i1.269522 [in English].
10. Zhang, Y., Li, H., Chen, Q., & Wang, S. (2023). A review of ventilation and cooling systems for large-scale pig farms. Sustainable Cities and Society, 90, 104372. https://doi.org/10.1016/j.scs.2022.104372 [in English].
11. Kaletnik, H. M., & Yaropud, V. M. (2022). Simulation of the heat and mass transfer process in an indirect evaporative heat exchanger. Tekhnika, Enerhetyka, Transport APK, 1(116), 4–15. https://doi.org/10.37128/2520-6168-2022-1-1 [in English].
12. Yaropud, V. M. (2024). Study of the efficiency of the functioning process of a mechatronic system for ensuring the microclimate of livestock premises. Tekhnika, Enerhetyka, Transport APK, 1(124), 56–72. https://doi.org/10.37128/2520-6168-2024-1-7 [in English].
13. Yaropud, V. M. (2024). Experimental studies of an indirect evaporative air heat exchanger. Vibrations in Engineering and Technology, 2(113), 55–65. https://doi.org/10.37128/2306-8744-2024-2-6 [in English].
14. Egebjerg. (2026). Product catalogue. Available at: http://www.egebjerg.com (accessed January 20, 2026). [in English].
15. Zhyzhka, S. V., Povod, M. H., & Mylostyvyi, R. V. (2019). Influence of microclimate parameters on productivity of lactating sows and growth of suckling piglets under different ventilation systems during transitional seasons. Theoretical and Applied Veterinary Medicine, 7(2), 90–96. [in Ukrainian].
16. Aolan. (2026). Energy-saving evaporative air coolers. Available at: http://www.aolan-china.com (accessed January 20, 2026). [in English].
17. Breezair (Seeley International). (2026). Product catalogue. Available at: http://www.breezair.com (accessed January 21, 2026). [in English].
18. Xuan, Y. M., Xiao, F., Niu, X., Huang, X., & Wang, S. (2012). Research and application of evaporative cooling in China: A review (I) – Research. Renewable and Sustainable Energy Reviews, 16(5), 3535–3546. https://doi.org/10.1016/j.rser.2012.01.052 [in English].
19. Pandelidis, D., Anisimov, S., Worek, W. M., & Maisotsenko, V. (2015). Heat and mass transfer processes in the Maisotsenko cycle heat and mass exchanger. Energy, 93, 240–250. https://doi.org/10.1016/j.energy.2015.09.063 [in English].
20. Gillan, L. (2008). Maisotsenko cycle for cooling process. International Journal of Energy for a Clean Environment, 9(1–3), 47–64. https://doi.org/10.1615/InterJEnerCleanEnv.v9.i1-3.50 [in English].
21. Maisotsenko, V. S., & Galaka, O. I. (2017). Method and systems for energy-saving heating and humidifying of buildings using outside air. U.S. Patent No. US20170016645A1. [in English].
22. Kaletnik, H., & Yaropud, V. (2023). Research of pressure losses and justification of the shapes of side-evaporative heat exchanger channels in livestock premises. Przeglad Elektrotechniczny, 99(7), 247–252. https://doi.org/10.15199/48.2023.07.46 [in English].
23. Draganov, B. H., et al. (2005). Heat engineering. Textbook (2nd ed., revised and expanded). Kyiv: INKOS Publishing House, 400 p. [in Ukrainian].
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.
