Technology, energy, agriculture transport AIC

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(St. Soniachna, 3, Vinnytsia, Ukraine, 21008, e-mail: yaropud77@gmail.com, https://orcid.org/0000-0003-0502-1356).

The article is devoted to investigating the influence of the structural parameters of an indirect evaporative heat exchanger on the efficiency of air cooling in microclimate control systems for livestock buildings. The relevance of the study is driven by increasing thermal loads during the summer period, higher requirements for maintaining comfortable conditions for animals, and the need to reduce energy consumption associated with air conditioning and ventilation processes in the agro-industrial sector.
The feasibility of using indirect evaporative cooling systems as an energy-efficient alternative to conventional compressor-based refrigeration units is substantiated. Such systems allow a reduction in the temperature of supply air without increasing its moisture content. A laboratory-scale experimental prototype of an indirect evaporative heat exchanger with a cross-flow air movement configuration was designed and manufactured. Experimental investigations were carried out by varying the inlet air temperature, absolute humidity, and airflow rate, as well as for two structural configurations of the heat and mass exchanger, featuring identical and different interchannel opening areas.
Based on statistical processing of the experimental data, second-order regression equations were obtained for the outlet temperature of the primary air stream, the thermal efficiency coefficient, and the effective cooling capacity of the heat exchanger. The adequacy of the developed mathematical models was confirmed using the Cochran and Fisher criteria, as well as by high correlation coefficients between experimental and calculated results. 
It was established that the use of different interchannel opening areas intensifies heat and mass transfer processes, reduces the outlet air temperature, and increases thermal efficiency and effective cooling capacity compared to the configuration with identical opening areas. Rational operating modes of the heat exchanger were determined in terms of minimizing outlet air temperature and maximizing energy efficiency. The obtained results can be applied in the design and optimization of microclimate systems for livestock buildings and in the development of automatic control algorithms for air cooling processes.

1.    Xuan, Y., 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, 3535–3546. DOI: https://doi.org/10.1016/j.rser.2012.01.052 [in English].
2.    Duan, Z. (2011). Investigation of a novel dew point indirect evaporative air conditioning system for buildings (Doctoral dissertation, The University of Nottingham). URL: https://eprints.nottingham.ac.uk/12200/1/PhD_thesis_Zhiyin_Duan.pdf [in English].
3.    Duan, Z., Zhan, C., Zhang, X., Mustafa, M., Alimohammadisagvand, B., Hasan, A., & Zhao, X. (2012). Indirect evaporative cooling: Past, present and future potentials. Renewable and Sustainable Energy Reviews, 16, 6823–6850. DOI: https://doi.org/10.1016/j.rser.2012.07.007 [in English].
4.    Gillan, L. (2008). Maisotsenko cycle for cooling process. International Journal of Energy for a Clean Environment, 9(1–3), 47–64. DOI: https://doi.org/10.1615/InterJEnerCleanEnv.v9.i1-3.50 [in English].
5.    Anisimov, S., & Pandelidis, D. (2013). Comparison of the performance of indirect evaporative heat exchangers with different air flow arrangements: Numerical simulation results. Ciepłownictwo Ogrzewnictwo Wentylacja, 3, 126–129. [in English].
6.    Hasan, A. (2010). Indirect evaporative cooling of air to a sub-wet bulb temperature. Applied Thermal Engineering, 30, 2460–2468. DOI: https://doi.org/10.1016/j.applthermaleng.2010.06.017 [in English].
7.    Yaropud, V. M. (2024). Investigation of the efficiency of the functioning process of a mechatronic microclimate control system for livestock buildings. Engineering, Energy, Transport AIC, 1(124), 56–72. DOI: https://doi.org/10.37128/2520-6168-2024-1-7 [in Ukrainian].
8.    Kaletnik, H. M. (2008). Energy supply of Ukraine and possibilities of using the potential of renewable energy sources. Bulletin of Agricultural Science, 10, 50–55. [in Ukrainian].
9.    Makarenko, P. M., Kalinichenko, O. V., & Aranchii, V. I. (2019). Energy efficiency and energy saving: Economic, technical-technological and environmental aspects. Astraya Publishing House. URL: https://dspace.nuft.edu.ua/jspui/bitstream/123456789/29381/1/1.pdf [in Ukrainian].
10.    Heßling, M., Hönes, K., Vatter, P., & Lingenfelder, C. (2020). Ultraviolet irradiation doses for coronavirus inactivation: Review and analysis of coronavirus photoinactivation studies. GMS Hygiene and Infection Control, 15, Article Doc08. DOI: https://doi.org/10.3205/dgkh000343 [in English].
11.    Aliiev, E. B., Yaropud, V. M., & Bilous, I. M. (2020). Substantiation of the structure of an energy-saving microclimate control system in pig housing facilities. Vibrations in Engineering and Technologies, 2(97), 129–137. [in Ukrainian].
12.    Kaletnik, H. M., & Yaropud, V. M. (2021). Theoretical studies of pneumatic losses in an indirect evaporative air heat exchanger for livestock buildings. Machinery & Energetics. Journal of Rural Production Research, 12(4), 35–41. [in Ukrainian].
13.    Kaletnik, H. M., & Yaropud, V. M. (2022). Simulation of heat and mass transfer processes in an indirect evaporative heat exchanger. Engineering, Energy, Transport AIC, 1(116), 4–15. DOI: https://doi.org/10.37128/2520-6168-2022-1-1 [in Ukrainian].
14.    Adamchuk, V., Dovbnenko, O., Danik, Yu., & Skydan, O. (2021). Technological aspects of energy-efficient high-quality indoor air cleaning from harmful impurities. Scientific Horizons, 24(4), 17–24. DOI: https://doi.org/10.48077/scihor.24(4).2021.17-24 [in English].
15.    Kaletnik, H., & Yaropud, V. (2023). Research of pressure losses and justification of channel shapes of indirect evaporative heat exchangers in livestock premises. Przegląd Elektrotechniczny, 99(7), 247–252. DOI: https://doi.org/10.15199/48.2023.07.46 [in English].
16.    Kaletnik, H. M., & Yaropud, V. M. (2021). Physical and mathematical model of a ventilation system for supplying clean air to livestock buildings. Engineering, Energy, Transport AIC, 3(114), 4–15. [in English].
17.    Yaropud, V. M. (2024). Experimental studies of an indirect evaporative air heat exchanger. Vibrations in Engineering and Technologies, 2(113), 55–65. DOI: https://doi.org/10.37128/2306-8744-2024-2-6 [in English].
18.    Arun, B. S., Mariappan, V., & Maisotsenko, V. (2020). Experimental study on combined low-temperature regeneration of liquid desiccant and evaporative cooling by ultrasonic atomization. International Journal of Refrigeration, 112, 100–109. DOI: https://doi.org/10.1016/j.ijrefrig.2019.11.023 [in English].
19.    Dovbnenko, O. F. (2021). Substantiation of technical and technological parameters of an electrotechnical system for cleaning indoor air in livestock buildings from harmful impurities. Mechanization and Electrification of Agriculture, 13(112), 180–186. DOI: https://doi.org/10.37204/0131-2189-2021-13-20 [in Ukrainian].
20.    Yaropud, V., Kupchuk, I., Burlaka, S., Poberezhets, J., & Babyn, I. (2022). Experimental studies of design and technological parameters of a heat exchanger. Przegląd Elektrotechniczny, 98(10), 57–60. DOI: https://doi.org/10.15199/48.2022.10.10 [in English].
21.    Yaropud, V. M. (2020). Investigation of the operating process and optimization of structural and technological parameters of a three-pipe recuperator. Engineering, Energy, Transport AIC, 1(108), 23–32. DOI: https://doi.org/10.37128/2520-6168-2020-1-16 [in English].
22.    Zhu, G., Chow, T.-T., Maisotsenko, V. S., & Wen, T. (2023). Maisotsenko power cycle technologies: Research, development and future needs. Applied Thermal Engineering, 223, 120023. DOI: https://doi.org/10.1016/j.applthermaleng.2023.120023 [in English].
23.    Horbatenko, I. Yu. (2001). Fundamentals of scientific research. Kyiv: Vyshcha Shkola. [in Ukrainian].
24.    Nechaiev, V. P. (2009). Theory of experimental design. Kyiv: Kondor. [in Ukrainian].