AbSolut - Integration of Absorption Technologies in District Heating and Cooling Systems for Enhanced Economic and Ecological Impact





District Heating, Absorption Heat Pump, Energy Efficiency, Economic Benefits, Decarbonization


District heating (DH) systems play a crucial role in meeting heating demands across the European Union (EU) and Austria, with significant potential for energy efficiency improvements and decarbonization. However, the transition towards climate neutrality by 2040 poses significant challenges, particularly in decarbonizing existing DH systems and integrating renewable energy sources. This work explores the application of absorption technologies, specifically absorption heat exchangers (AHX), absorption chillers (AC), and absorption heat pumps (AHP), in optimizing DH systems. The study investigates the utilization of AHX as transfer substations to increase heat capacity within existing grids by up to 30%, facilitating the integration of renewables and reducing distribution heat losses. Additionally, AC implementation for cooling supply demonstrates efficiency improvements through dynamic operation modes, renewable energy integration, and reduced electricity demand. Furthermore, AHP for waste heat utilization in DH power plants showcases environmental benefits, cost savings, and enhanced energy security. Through detailed techno-economic analyses and case studies, the paper evaluates the viability and economic feasibility of absorption technologies in DH applications. Challenges such as system integration, spatial requirements, and driving energy optimization are addressed, offering insights into overcoming barriers to adoption. Overall, the research highlights the transformative potential of absorption technologies in enhancing the efficiency, sustainability, and resilience of DH systems. By leveraging these technologies, DH operators and stakeholders can navigate the transition towards climate neutrality, while ensuring reliable and cost-effective heating and cooling solutions for urban areas.


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Corscadden, J., Möhring, P., Krasatsenka, A. (2021): Renewable Energy Sources in District heating and Cooling, EU Level Survey, RES-DHC Project https://www.res-dhc.com/wp-content/uploads/2021/05/RES-DHC_WP2_Task_2.1_D2.1_Survey_EU-Level_FINAL_UPDATED_202104.pdf

Yuan, M., Mathiesen, B.-V., Schneider, N. et.al. (2024): Renewable energy and waste heat recovery in district heating systems in China: A systematic review, Energy, Vol. 294, 130788, doi: https://doi.org/10.1016/j.energy.2024.130788

BMK, (2020): Fernwärmedaten, https://www.bmk.gv.at/themen/energie/energieversorgung/fernwaerme.html (10.3.2024)

European Commission (2021): Overview of District Heating and Cooling Markets and Regulatory Frameworks under the Revised Renewable Energy Directive, Report, Brussels, https://energy.ec.europa.eu/publications/district-heating-and-cooling-european-union_en, (15.2.2024)

FGW – Fachverband der Gas- und Wärmeversorgung (2021): Zahlenspiegel Gas und Fernwärme Österreich, https://www.gaswaerme.at/media/medialibrary/2021/09/zasp21_hi.pdf

Zotter, G., Eberhöfer, D., Seidnitzer-Gallien C. (2023): An energetical, exergetical and experimental analysis of an absorption heat exchanger used as transfer substation in an already existing district heating grid, 14th IEA Heat Pump Conference, 15-18 May 2023, Chicago.

Gong, Y., Ma, G., Jiang, Y., et.al. (2023): Research progress on the fifth-generation district heating system based on heat pump technology. In: Journal of Building Engineering, Volume 71, https://doi.org/10.1016/j.jobe.2023.106533

Eslami, S., Noorollahi, Y., Marzband, M., et.al. (2023): Integrating heat pumps into district heating systems: A multi-criteria decision analysis framework incorporating heat density and renewable energy mapping. In: Sustainable Cities and Society, Volume 98, https://doi.org/10.1016/j.scs.2023.104785

Ochs, F., Magni, M., Dermentzis, G. (2022): Integration of Heat Pumps in Buildings and District Heating Systems—Evaluation on a Building and Energy System Level. In: Energies, 15 (11), https://doi.org/10.3390/en15113889

Sifanaios, I., Sneum, D.M., Jensen, A.R., et.al. (2023): The impact of large-scale thermal energy storage in the energy system. In: Applied Energy, Volume 349, https://doi.org/10.1016/j.apenergy.2023.121663

Vannoni, A., Sorce, A., Traverso, A., et.al. (2023): Techno-economic optimization of high-temperature heat pumps for waste heat recovery. In: Energy Conversion and Management, Volume 290, https://doi.org/10.1016/j.enconman.2023.117194

Yuan, M., Zinck Thellufsen, J., Sorrknaes, P., et.al. (2021): District heating in 100% renewable energy systems: Combining industrial excess heat and heat pumps. In: Energy Conversion and Management, Volume 244, https://doi.org/10.1016/j.enconman.2021.114527

Wolf, S. (2017): Integration von Wärmepumpen in industriellen Produktionssysteme: Potenzial und Instrumente zur Potenzialerschließung, Dissertation, Stuttgart, doi: http://dx.doi.org/10.18419/opus-9593

Cudok F, Ziegler, F. (2015): Absorption heat converter and the characteristic equation method. Proceedings of the 24th IIR International Congress of Refrigeration: Yokohama, Japan, August 16-22, 2015, doi: https://doi.org/10.18462/IIR.ICR.2015.0764

Hausherr, C., Petersen, S, Hüls, W., et.al. (2021): Primary energy efficiency potentials of district heat driven refrigeration systems, Energy Reports, Vol. 7, p. 79-87, 17th International Symposium on District Heating and Cooling, 6–9 September 2021, Nottingham, UK, doi: https://doi.org/10.1016/j.egyr.2021.09.036




How to Cite

Seidnitzer-Gallien, C., Ribas-Tugores, C., & Zotter, G. (2024). AbSolut - Integration of Absorption Technologies in District Heating and Cooling Systems for Enhanced Economic and Ecological Impact. International Sustainable Energy Conference - Proceedings, 1. https://doi.org/10.52825/isec.v1i.1097

Conference Proceedings Volume


Future District Heating and Cooling

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