Integration of waste heat recovery systems of thermal power plants into urban infrastructure: case study of hot water supply f or the “Usolsky” district of Pavlodar using heat pumps
Keywords:
waste heat, heat pump, TPP, DHW, energy efficiencyAbstract
This study analyzes the feasibility of utilizing the low-grade heat of cooling water from the Aksu Thermal Power Plant (TPP) to provide domestic hot water (DHW) for the “Usolsky” district of Pavlodar. The paper presents the results of thermodynamic and techno-economic analyses of a heat pump system of the water-to-water type (Mammoth MCRH-0140), which uses the waste heat of the Irtysh River. It is shown that the use of heat pumps with a coefficient of performance (COP) ≈3.6 significantly reduces the specific fuel consumption for thermal energy generation and decreases carbon dioxide emissions by more than 2,500 tons per year. The main design parameters of the projected heat pump station (HPS), calculated energy consumption, economic performance, and payback period (approximately 5.9 years) are presented. The implementation of the proposed scheme demonstrates a high potential for integrating low-grade heat sources into urban thermal infrastructure and can serve as a pilot model for the transition to fourth- and fifth-generation district heating systems (4GDH/5GDHC) in Kazakhstan.
References
Alimgazin A.S., Alimgazina S. G., Zhumagulov M. G. Heat pump in a new modular configuration to recover low-grade heat emissions at enter-prises// E3S Web of Conferences 178, 01003 (2020) https://doi.org /10.1051/e3sconf/202017801003 HSTED-2020.
Lund H., Østergaard P.A., Nielsen T.B., et al. Perspectives on Fourth and Fifth Generation District Heating. Energy, 2021;227:120520. DOI: 10.1016/j.energy.2021.120520.
IEA. The Future of Heat Pumps. Paris: International Energy Agency, 2022. https://www.iea.org/reports/the-future-of-heat-pumps
Xu Z.Y., Mao H.C., Liu D.S., Wang R.Z. Waste heat recovery of power plant with large scale serial absorption heat pumps. Energy, 2018;165:1097–1105. DOI: 10.1016/j.energy.2018.10.052.
Алимгазин А.Ш., Яворовский Ю.В., Султангузин И.А., Бартенев А.И., Прищепова С.А., Трушин Е.С. Повышение энергетической и экологической эффективности теплоэлектроцентрали на основе применения абсорбционных трансформаторов теплоты// Вестник МЭИ, 2020, №4, С.89-97.
Pakere I., Rochas C., Porubova J., et al. Valorisation of Waste Heat in Existing and Future District Heating Systems. Energies, 2023; 16(19):6796. DOI: 10.3390/en16196796.
Bühler F., et al. Spatiotemporal and economic analysis of industrial excess heat integration into district heating. Energy, 2018; 151:464–476. DOI: 10.1016/j.energy.2018.03.076.
Schmidt D., et al. Low temperature district heating for future energy systems. Energy Procedia, 2017;116:26–38. DOI: 10.1016/j.egypro.2017.05.055.Bartolini A., et al. Decarbonizing the heating supply of an urban district in Kazakhstan. E3S Web of Conferences, 2021. https://www.e3s-conferences.org/articles/e3sconf/abs/2021/35/e3sconf_efe2021_01020/e3sconf_efe2021_01020.html.
Алимгазин А.Ш., Бергузинов А.Н., Султангузин И.А., Серкпаев М.О., Ахметова И.Г., Жакишев Б.А. Перспективы применения технологий трансформации теплоты для декарбонизации углеродной экономики Республики Казахстан. // Вестник НАО «Торайгыров Университета», серия «Энергетическая», №2,2022 г., c.21-33
Министерство энергетики Республики Казахстан. Стратегия низкоуглеродного развития до 2060 года. Указ Президента РК №121, 2023.
