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Medium-deep geothermal resources in the Molasse Basin: A geological, techno-economic, and ecological study of large-scale heat pump integration

Author

Listed:
  • Jeßberger, Jaromir
  • Uhrmann, Hannah
  • Schölderle, Felix
  • Pfrang, Daniela
  • Heberle, Florian
  • Zosseder, Kai
  • Brüggemann, Dieter

Abstract

Medium-deep geothermal systems, with low exploration and investment costs, offer a solution to decarbonize the heating sector. The South German Molasse Basin (SGMB) is a reservoir with significant hydrothermal potential, where exploration has largely focused on depths greater than 2500 m. Here, medium-deep geothermal systems could provide water temperatures of 30 °C–80 °C. Large-scale heat pumps can raise supply temperatures for integration into district heating networks. While previous studies have concentrated on specific cases, this study adopts a more comprehensive approach, by examining the region of the underexplored northern SGMB. Geological parameters, such as depth, temperature, and water flow rates, were analysed to evaluate the techno-economic and ecological feasibility. At 1000 m depth, a base scenario with thermal water temperatures of 45.6 °C and a mass flow rate of 100 kg/s was evaluated. Following, sensitivity analyses varied geological parameters like depth and flow rate, based on the geological analyses, to represent the entire region, revealing LCOH between 77 and 151 €·MWh−1 and GWP between 53 and 136 kg CO2 eq./MWh. These holistic analyses demonstrate the significant benefits of medium-deep geothermal systems combined with heat pumps for sustainable heating. And provide guidance to local authorities and operators.

Suggested Citation

  • Jeßberger, Jaromir & Uhrmann, Hannah & Schölderle, Felix & Pfrang, Daniela & Heberle, Florian & Zosseder, Kai & Brüggemann, Dieter, 2025. "Medium-deep geothermal resources in the Molasse Basin: A geological, techno-economic, and ecological study of large-scale heat pump integration," Renewable Energy, Elsevier, vol. 248(C).
    • Handle: RePEc:eee:renene:v:248:y:2025:i:c:s0960148125008092
    DOI: 10.1016/j.renene.2025.123147
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    References listed on IDEAS

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    1. Menberg, Kathrin & Heberle, Florian & Uhrmann, Hannah & Bott, Christoph & Grünäugl, Sebastian & Brüggemann, Dieter & Bayer, Peter, 2023. "Environmental impact of cogeneration in binary geothermal plants," Renewable Energy, Elsevier, vol. 218(C).
    2. Jiang, Jiatong & Hu, Bin & Wang, R.Z. & Deng, Na & Cao, Feng & Wang, Chi-Chuan, 2022. "A review and perspective on industry high-temperature heat pumps," Renewable and Sustainable Energy Reviews, Elsevier, vol. 161(C).
    3. Violante, Anna Carmela & Donato, Filippo & Guidi, Giambattista & Proposito, Marco, 2022. "Comparative life cycle assessment of the ground source heat pump vs air source heat pump," Renewable Energy, Elsevier, vol. 188(C), pages 1029-1037.
    4. Arpagaus, Cordin & Bless, Frédéric & Uhlmann, Michael & Schiffmann, Jürg & Bertsch, Stefan S., 2018. "High temperature heat pumps: Market overview, state of the art, research status, refrigerants, and application potentials," Energy, Elsevier, vol. 152(C), pages 985-1010.
    5. Deng, Jiewen & Su, Yangyang & Peng, Chenwei & Qiang, Wenbo & Cai, Wanlong & Wei, Qingpeng & Zhang, Hui, 2023. "How to improve the energy performance of mid-deep geothermal heat pump systems: Optimization of heat pump, system configuration and control strategy," Energy, Elsevier, vol. 285(C).
    6. Mazhar, Abdur Rehman & Liu, Shuli & Shukla, Ashish, 2018. "A state of art review on the district heating systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 96(C), pages 420-439.
    7. Jensen, Jonas K. & Ommen, Torben & Markussen, Wiebke B. & Elmegaard, Brian, 2017. "Design of serially connected district heating heat pumps utilising a geothermal heat source," Energy, Elsevier, vol. 137(C), pages 865-877.
    8. Dong, Shihao & Yu, Yuelong & Li, Bingxue & Ni, Long, 2025. "Thermal analysis of medium-depth borehole heat exchanger coupled layered stratum thermal conductivity," Renewable Energy, Elsevier, vol. 246(C).
    9. Arat, Halit & Arslan, Oguz, 2017. "Exergoeconomic analysis of district heating system boosted by the geothermal heat pump," Energy, Elsevier, vol. 119(C), pages 1159-1170.
    10. Jia, Guosheng & Ma, Zhendi & Zhang, Zhibin & Hao, Jianke & Cao, Ying & Ma, Yulian & Jin, Liwen, 2025. "Thermal performance and influencing range of underground inclined medium-deep geothermal heat exchangers," Renewable Energy, Elsevier, vol. 243(C).
    11. Mélanie Douziech & Lorenzo Tosti & Nicola Ferrara & Maria Laura Parisi & Paula Pérez-López & Guillaume Ravier, 2021. "Applying Harmonised Geothermal Life Cycle Assessment Guidelines to the Rittershoffen Geothermal Heat Plant," Energies, MDPI, vol. 14(13), pages 1-14, June.
    12. Liu, Dong-xi & Lei, Hai-Yan & Li, Jia-Shu & Dai, Chuan-shan & Xue, Rui & Liu, Xin, 2024. "Optimization of a district heating system coupled with a deep open-loop geothermal well and heat pumps," Renewable Energy, Elsevier, vol. 223(C).
    13. Frick, Stephanie & Kaltschmitt, Martin & Schröder, Gerd, 2010. "Life cycle assessment of geothermal binary power plants using enhanced low-temperature reservoirs," Energy, Elsevier, vol. 35(5), pages 2281-2294.
    14. Zhang, Ruirui & Wang, Guiling & Shen, Xiaoxu & Wang, Jinfeng & Tan, Xianfeng & Feng, Shoutao & Hong, Jinglan, 2020. "Is geothermal heating environmentally superior than coal fired heating in China?," Renewable and Sustainable Energy Reviews, Elsevier, vol. 131(C).
    15. Pan, Shu-Yuan & Gao, Mengyao & Shah, Kinjal J. & Zheng, Jianming & Pei, Si-Lu & Chiang, Pen-Chi, 2019. "Establishment of enhanced geothermal energy utilization plans: Barriers and strategies," Renewable Energy, Elsevier, vol. 132(C), pages 19-32.
    16. Semmari, Hamza & Bouaicha, Foued & Aberkane, Sofiane & Filali, Abdelkader & Blessent, Daniela & Badache, Messaoud, 2024. "Geological context and thermo-economic study of an indirect heat ORC geothermal power plant for the northeast region of Algeria," Energy, Elsevier, vol. 290(C).
    17. Felix Schölderle & Gregor Götzl & Florian Einsiedl & Kai Zosseder, 2022. "Uncertainty Assessment of Corrected Bottom-Hole Temperatures Based on Monte Carlo Techniques," Energies, MDPI, vol. 15(17), pages 1-27, August.
    18. Lohse, Christiane, 2018. "Environmental impact by hydrogeothermal energy generation in low-enthalpy regions," Renewable Energy, Elsevier, vol. 128(PB), pages 509-519.
    19. Sadhukhan, Jhuma, 2022. "Net zero electricity systems in global economies by life cycle assessment (LCA) considering ecosystem, health, monetization, and soil CO2 sequestration impacts," Renewable Energy, Elsevier, vol. 184(C), pages 960-974.
    20. Kiran, Raj & Upadhyay, Rajeev & Rajak, Vinay Kumar & Kumar, Ashutosh & Datta Gupta, Saurabh, 2024. "Underpinnings of reservoir and techno-economic analysis for Himalayan and Son-Narmada-Tapti geothermal sites of India," Renewable Energy, Elsevier, vol. 237(PA).
    21. He, Yuting & Jia, Min & Li, Xiaogang & Yang, Zhaozhong & Song, Rui, 2021. "Performance analysis of coaxial heat exchanger and heat-carrier fluid in medium-deep geothermal energy development," Renewable Energy, Elsevier, vol. 168(C), pages 938-959.
    22. Barco-Burgos, J. & Bruno, J.C. & Eicker, U. & Saldaña-Robles, A.L. & Alcántar-Camarena, V., 2022. "Review on the integration of high-temperature heat pumps in district heating and cooling networks," Energy, Elsevier, vol. 239(PE).
    23. Maria Laura Parisi & Melanie Douziech & Lorenzo Tosti & Paula Pérez-López & Barbara Mendecka & Sergio Ulgiati & Daniele Fiaschi & Giampaolo Manfrida & Isabelle Blanc, 2020. "Definition of LCA Guidelines in the Geothermal Sector to Enhance Result Comparability," Energies, MDPI, vol. 13(14), pages 1-18, July.
    24. Adamson, Keri-Marie & Walmsley, Timothy Gordon & Carson, James K. & Chen, Qun & Schlosser, Florian & Kong, Lana & Cleland, Donald John, 2022. "High-temperature and transcritical heat pump cycles and advancements: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 167(C).
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