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A framework for assessing the technical and economic potential of shallow geothermal energy in individual and district heating systems: A case study of Slovenia

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  • Stegnar, Gašper
  • Staničić, D.
  • Česen, M.
  • Čižman, J.
  • Pestotnik, S.
  • Prestor, J.
  • Urbančič, A.
  • Merše, S.

Abstract

The deployment of geothermal energy systems can significantly contribute to climate change mitigation and play a part in the transition to a low carbon society. This study proposes a framework for identifying the shallow geothermal energy potential of new individual and district heating (DH) systems. The model accounts for thermal interference between neighbouring wells and borehole heat exchangers, where the main criteria for analysis are ground temperature, thermal conductivity, heat flow, and heat capacity. The paper presents a cost-effective area method for the identification of potential new DH areas, while considering the cost competitiveness of the heat supplied. Economic potential is determined based on the cost-effectiveness of the competing technologies, separately for urban and rural areas. The results show that although 54% of technical DH potential in Slovenia remains untapped, the future of shallow geothermal energy systems lies predominantly in individual systems, which have proven to be the most cost efficient solution on locations with favourable geological or hydro-geological conditions. Where possible, shallow geothermal energy can contribute from 2% to 25% of energy for heat production in analysed existing fossil fuel based DH systems, thus making shallow geothermal energy suitable for supplying base load power in an economical manner.

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  • Stegnar, Gašper & Staničić, D. & Česen, M. & Čižman, J. & Pestotnik, S. & Prestor, J. & Urbančič, A. & Merše, S., 2019. "A framework for assessing the technical and economic potential of shallow geothermal energy in individual and district heating systems: A case study of Slovenia," Energy, Elsevier, vol. 180(C), pages 405-420.
    • Handle: RePEc:eee:energy:v:180:y:2019:i:c:p:405-420
    DOI: 10.1016/j.energy.2019.05.121
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    7. Atefeh Abbaspour & Hossein Yousefi & Alireza Aslani & Younes Noorollahi, 2022. "Economic and Environmental Analysis of Incorporating Geothermal District Heating System Combined with Radiant Floor Heating for Building Heat Supply in Sarein, Iran Using Building Information Modeling," Energies, MDPI, vol. 15(23), pages 1-24, November.
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    11. Qiu, Lihua & He, Li & Kang, Yu & Liang, Dongzhe, 2022. "Assessment of the potential of enhanced geothermal systems in Asia under the impact of global warming," Renewable Energy, Elsevier, vol. 194(C), pages 636-646.
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    13. Nielsen, Tore Bach & Lund, Henrik & Østergaard, Poul Alberg & Duic, Neven & Mathiesen, Brian Vad, 2021. "Perspectives on energy efficiency and smart energy systems from the 5th SESAAU2019 conference," Energy, Elsevier, vol. 216(C).
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    15. Vivek Aggarwal & Chandan Swaroop Meena & Ashok Kumar & Tabish Alam & Anuj Kumar & Arijit Ghosh & Aritra Ghosh, 2020. "Potential and Future Prospects of Geothermal Energy in Space Conditioning of Buildings: India and Worldwide Review," Sustainability, MDPI, vol. 12(20), pages 1-19, October.
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