Research of heat generation and consumption modes in combined heat supply systems using alternative energy sources.
DOI:
https://doi.org/10.15276/opu.1.69.2024.05Keywords:
combined heat supply system, boiler, solar collector, heat pump, heat accumulatorAbstract
Alternative energy currently has all the technical means that allow it to be considered a classic addition to traditional methods of energy production. Modern energy technologies require a more effective and reliable solution to the problem of energy supply based on the integrated use of various types of renewable energy sources, energy accumulators of various types, heat pumps, combined means of thermal modernization of buildings and alternative fuel energy backups. In modern heat supply systems using alternative energy sources, usually at least 2 heat sources are used - a renewable heat source and a traditional source as reserve and peak. The operation of gas, solid fuel, pellet and electric boilers, solar collectors, various types of heat pumps in the heat supply systems of buildings and civilian buildings is analyzed. The high-quality operation of the heat supply system is affected by various schemes of connecting consumers to heat generators. The specifics of the effective operation of the combined heat supply system are the coordination of various hydraulic “generator-consumer” modes. In practice, three approaches are used to coordinate the modes of operation of alternative heat supply systems with consumers: regulation of the power of the heat source, programming of heat consumption modes, introduction of heat accumulators. It is important to find out the conditions for the effective use of heat accumulators for
intermittent heating mode, which can ensure a decrease in the thermal power of a heat generator operating in superheat mode. The operation of the pilot plant of the integrated system of alternative heat supply (ISAHS) was studied, the technical and economic indicators obtained for
the heating period for three different types of heat generators: gas boiler, pellet boiler, heat pump were analyzed. An experimental study of the combined heat supply system for various heat supply facilities made it possible to establish that for public buildings, a rational way to
increase their efficiency is the use of intermittent heating modes, a two-stage storage system, and coordination of structural and mode parameters of the main contours of the system.
Downloads
References
Energy strategy of Ukraine for the period up to 2050. (2023). Retrieved from: https://minfin.com.ua/2023/05/02/105069123/.
Energy strategy of Ukraine for the period until 2035. (2015). The White Paper on Energy Policy of Ukraine “Security and Competitiveness”. Kyiv: 49 p.
On energy saving: Law of Ukraine dated July 1, 1994. Retrieved from: https://zakon.rada.gov.ua/laws/show/74/94-%D0%B2%D1%80#Text.
IRENA. (2024). Tripling renewable power by 2030: The role of the G7 in turning targets into action, International Renewable Energy Agency, Abu Dhabi. 2024. Retrieved from: www.irena.org/publications.
. Zaitsev, D. V., Klimchuk, A. A., & Balasanian, G. A. (2015). Analysis of Key Approaches to the Thermal Modernization of Buildings and the Methods of their Use. NTU “KhPI” Bulletin: Power and Heat Engineering Processes and Equipment, 1(17), 156–160. DOI: https://doi.org/10.20998/2078-774X.2015.17.24.
Klymchuk, A.A., Luzhanskaya, A.V., & Shramenko, A.N. (2017). Construction Modernization of Heat Accumulators Based on Solid Materials for Electricity Night Tariffs Operation. Refrigeration Engineering and Technology, 53(2), 44–48. DOI: https://doi.org/10.15673/ret.v53i2.594.
Klymchuk, O. Luzhanska, G., Balasanyan, G., Serheyev, M., & Aksyonova, I. (2022). Application of CAD technologies for research of heat exchange units of microclimate systems based on alternative energy sources. Proceedings of Odessa Polytechnic University, 1(65), 47–55. DOI: https://doi.org/10.15276/opu.1.65.2022.05.
Zaitsev, M.O. (2017). Gas dynamics in heat-tube water-heating solid fuel boilers. Ventilation, lighting and gas supply, 22, 25–30.
Klymchuk, O., Denysova, A., Zaitsev, N., Lozheczhnikova, N., & Borysenko, K. (2021). Design of a combined burner based on the patterns of interaction between an external swirling jet and an axial direct-flow jet. Eastern-European Journal of Enterprise Technologies, 1(8(109), 44–51. DOI: https://doi.org/10.15587/1729-4061.2021.225269.
Klimchuk, O.A., Luzhanska, G.V., Kandeeva, V.V., Aksyonova, I.V., & Borokhov, I.V. (2021). Ways to increase the energy efficiency of heat and mass exchange installations of low-temperature combined heating systems when using alternative energy sources. Scientific Bulletin of TDATU, 11, 2, 375–384.
Novikov, K.Yu., Tytyk, O.V., & Luzhanska, G.V. (2023). Use of a heat pump in air conditioning systems. Modern problems of refrigeration equipment and technology. Collection of abstracts of reports of the XIV All-Ukrainian scientific and technical conference. September 21-22, 2023. Odesa: ONTU, pp. 66–68.
Mykhaylenko, M.S., & Luzhanska, G.V. (2024). Multi-zone air conditioning systems to create a microclimate. State of achievement and prospects of refrigeration equipment and technology. Collection of reports of the scientific and technical conference of young scientists and students of higher education, April 16-17, 2024. Odesa: ONTU, рp. 17–19.
Luzhanska, G.V., Ignatenko, D.S., Hryshchenko, S.I., Sergeyev, I.V., & Murenko, I.V. (2023). The principle of operation of the combined heating system. Theoretical and science bases of actual tasks. Proceedings of the XXIV International Scientific and Practical Conference. Varna, Bulgaria, pp. 368–371.
Denysova, A.E., Klymchuk, O.A., Ivanova, L.V., & Zhaivoron, O.S. (2020). Energy Efficiency of Heat Pumps Heating Systems at Subsoil Waters for South-East Regions of Europe. Probleme le energeticii regionale, 4 (48), 78–89. Retrieved from: https://journal.ie.asm.md/ru/contents/electronni-jurnal-448-2020.
Juravleov, A., Sit, M., Sit, B., Zubaty, A., Poponova, Olga, & Timcenco, D. (2007). The Use of Heat Pumps in District Heating Systems. Sixth International Conference on Electromechanical and Power Systems. October 10-12, 2007, Chisinau, Republic of Moldova.
Doroshenko, A.V., & Glauberman, M.A. (2012). Alternative Energy. Refrigerating and Heating System: monograf. Odesa: I.I. Mechnikov National University.
Pan, E. et al. (2021). Operation optimization of integrated energy systems based on heat storage characteristics of heating network. Energy Science & Engineering, 9, 2, 223–238.
