This study presents a methodology for assessing the technical condition of district heating pipelines under high wear, variable thermal loads, and limited modernization resources. Emphasis is placed on installation defects, cyclic temperature and pressure fluctuations, and corrosion-induced degradation. A case study of a return water pipeline in Kremenchuk, featuring a 3° installation misalignment and 10 cm flange displacement, demonstrated stresses of 220–250 MPa, exceeding the steel’s yield strength in critical zones. Real operational conditions, including daily temperature fluctuations and load variations, were incorporated into the modeling to ensure accuracy. The approach enables prioritization of reconstruction zones, supports data-driven decision-making, and enhances the long-term operational efficiency of district heating networks under constrained budgets.
Müller, D., Nastasi, B., Vigna, I., & Wetter, M. (2019). System analysis of district heating networks in Germany. Energy, 180, 665–678. https://doi.org/10.1016/j.energy.2019.05.120
Werner, S. (2017). District heating and cooling in Sweden. Energy, 126, 419–429. https://doi.org/10.1016/j.energy.2017.03.052
Lauenburg, P., & Wernstedt, F. (2016). Adaptive control of district heating systems using machine learning and demand forecasts. Applied Energy, 162, 1337–1345. https://doi.org/10.1016/j.apenergy.2015.02.045
Geletukha, G., Kramar, V., Oliynyk, Y., & Antonenko, V. (2018). Analysis of the possibilities for saving and development of district heating systems іn Ukraine. Thermophysics and Thermal Power Engineering, 41(1), 53-58. https://doi.org/https://doi.org/10.31472/ttpe.1.2019.7 (in Ukrainian)
Fang, H., Xia, J., Jiang, Y., Zhang, X., & Li, Y. (2015). Key issues and solutions in district heating development. Energy, 86, 589–602. https://doi.org/10.1016/j.energy.2015.04.016
Bednarska, I. S., & Ryndiuk, D. V. (2022). Determination of the stress–strain state of a shut-off and control valve of a NPP considering gas dynamics of the working medium. Vcheni zapysky Tavriiskoho natsionalnoho universytetu imeni V. I. Vernadskoho. Seriia: Tekhnichni nauky, 33(72), (5), 193–198. https://doi.org/10.32782/2663-5941/2022.5/28 (in Ukrainian)
Frederiksen, S., & Werner, S. (2013). District heating and cooling. Lund: Studentlitteratur. https://doi.org/10.1016/B978-0-12-409548-9.01094-0
Lund, H., Werner, S., Wiltshire, R., Svendsen, S., Thorsen, J. E., Hvelplund, F., & Mathiesen, B. V. (2014). 4th generation district heating (4GDH). Energy, 68, 1–11. https://doi.org/10.1016/j.energy.2014.02.089
Liu, X., Wang, C., & Wang, Q. (2020). Integration of renewable energy into district heating systems: A review of technology and policy. Renewable Energy, 147, 2633–2645. https://doi.org/10.1016/j.renene.2019.09.120
UABIO. (2021). Status and directions of development of centralized heat supply [Report]. Retrieved from https://uabio.org/wp-content/uploads/2023/02/Stan_ta_shlyakhy_rozvytku_tsentralizovanoho_teplopostachannya.pdf (in Ukrainian)
Kyivteploenergo replaced 70 km of the most worn-out heat networks and eliminated over 6,000 accidents. (2019, July 12). Kyiv City State Administration Official Portal. Retrieved May 27, 2025, from https://kyivcity.gov.ua/news/kivteploenergo_zaminilo_70_km_naybilsh_znoshenikh_teplomerezh_ta_usunulo_ponad_6_tisyach_avariy (in Ukrainian)
Reconstruction of heating networks has started at three sites in Kyiv. (2021). Kyivteploenergo. Retrieved May 27, 2025, from https://kte.kmda.gov.ua/u-kyyevi-na-troh-ob-yektah-rozpochata-rekonstruktsiya-teplomerezh (in Ukrainian)
Kyivteploenergo will replace nearly 14 km of the most worn-out heat networks in Troyeshchyna. (2023). Kyiv City State Administration Official Portal. Retrieved May 27, 2025, from https://kyivcity.gov.ua/news/kp_kivteploenergo_zaminit_mayzhe_14_km_naybilsh_znoshenikh_teplomerezh_na_troyeschini (in Ukrainian)
Rindyuk, D. V., & Bednarska, I. S. (2025). Influence of the steam sieve on the stress-strain state of the control valve. Scientific Notes of V. I. Vernadsky Taurida National University. Series: Technical Sciences, 36(1), 19–32. https://doi.org/10.32782/2663-5941/2025.1.1/19 (in Ukrainian)
Chernousenko, O., Rindyuk, D., Peshko, V., & Bednarska, I. (2022, October). Effect of start-up operating modes on the cyclic damage of thermal power plant units. In 2022 IEEE 8th International Conference on Energy Smart Systems (ESS) (pp. 233-238). IEEE. https://doi.org/10.1109/ESS57819.2022.9969301