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.
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About journal
The magazine "Engineering, Energy, Transport AIC" is included in the list of scientific professional editions of Ukraine on technical sciences
(Category "Б", Order of the Ministry of Education and Science of Ukraine dated 02.07.2020 №886)
According to the decision of National Council of Television and Radio Broadcasting of Ukraine from 25.04.2024 No. 1337 the scientific journal «Engineering, Energy, Transport AIC» has the ID of the Media R30-05173.
The journal "Engineering, Energy, Transport AIC" is indexed according to the following databases and catalogs:
Certificate of state registration of mass media: No. 21906-11806 P dated 03/12/2016.
Founder of the journal: Vinnytsia National Agrarian University
Type of publication: journal
Kind of publication: scientific
Publication status: domestic
Year of foundation: 1997
Periodicity: 4 times per year
Volume: 18-20 conv. print. sheet (А4)
ISSN: 2520-6168 (print version), (online version)
Language of publication: (mixed languages) Ukrainian, English
The sphere of distribution and category of readers: national, foreign, faculty, scientists, entrepreneurs.
The periodical edition is included to the List of scientific professional publications of Ukraine on technical sciences, approved by order of the Ministry of Education and Science of Ukraine in 05.16.2016, No. 515.
The journal "Engineering, Energy, Transport AIC" is included in the "Catalog of Ukrainian Publications".
Subscription to the journal can be issued in each post office. The subscription index is 99720.
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.
The journal consistently adheres to the principles of open science. All published materials are distributed under the Creative Commons Attribution 4.0 International License (CC BY 4.0), ensuring open access to research results provided proper attribution to the authors and the original publication is maintained.
At present, Technology, energy, agriculture transport AIC is an authoritative professional scientific journal (Category B), providing a platform for the publication of fundamental and applied research results, promoting the integration of education, science, and industry, and contributing to the advancement of engineering and technological support of the agro-industrial complex of Ukraine.
