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G.POT: A quantitative method for the assessment and mapping of the shallow geothermal potential

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  • Casasso, Alessandro
  • Sethi, Rajandrea

Abstract

GSHPs (Ground source heat pumps) exchange heat with the ground to provide sustainable heating or cooling. Their technological feasibility and economic viability depend on the site-specific thermal properties of the ground and on the usage profile of the plant. These parameters influence the shallow geothermal potential, which is defined as the thermal power that can be efficiently exchanged by a BHE (Borehole Heat Exchanger) of a certain depth. We present a general method (G.POT) for the determination of shallow geothermal potentials. This method was derived using a comprehensive set of analytical heat transfer simulations, performed by varying (i) the thermal properties of the ground, which comprise its thermal conductivity and capacity, (ii) the thermal properties of the borehole, and (iii) the operational and design parameters of the plant, namely, the BHE length, the threshold temperature of the heat carrier fluid, the duration of the heating/cooling season and the simulated lifetime. Therefore, the G.POT method is a simple and flexible tool that can be implemented in a wide range of different scenarios for large-scale mapping of geothermal potentials. We also assess G.POT by discussing its application to map the geothermal yield in the Province of Cuneo (Piemonte, NW Italy).

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  • Casasso, Alessandro & Sethi, Rajandrea, 2016. "G.POT: A quantitative method for the assessment and mapping of the shallow geothermal potential," Energy, Elsevier, vol. 106(C), pages 765-773.
    • Handle: RePEc:eee:energy:v:106:y:2016:i:c:p:765-773
    DOI: 10.1016/j.energy.2016.03.091
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    15. Ramos-Escudero, Adela & García-Cascales, M. Socorro & Cuevas, Jose M. & Sanner, Burkhard & Urchueguía, Javier F., 2021. "Spatial analysis of indicators affecting the exploitation of shallow geothermal energy at European scale," Renewable Energy, Elsevier, vol. 167(C), pages 266-281.
    16. Walch, Alina & Mohajeri, Nahid & Gudmundsson, Agust & Scartezzini, Jean-Louis, 2021. "Quantifying the technical geothermal potential from shallow borehole heat exchangers at regional scale," Renewable Energy, Elsevier, vol. 165(P1), pages 369-380.
    17. Bruno Piga & Alessandro Casasso & Francesca Pace & Alberto Godio & Rajandrea Sethi, 2017. "Thermal Impact Assessment of Groundwater Heat Pumps (GWHPs): Rigorous vs. Simplified Models," Energies, MDPI, vol. 10(9), pages 1-19, September.
    18. Alcaraz, Mar & Vives, Luis & Vázquez-Suñé, Enric, 2017. "The T-I-GER method: A graphical alternative to support the design and management of shallow geothermal energy exploitations at the metropolitan scale," Renewable Energy, Elsevier, vol. 109(C), pages 213-221.
    19. Li, Zhao & Luo, Zujiang & Wang, Yan & Fan, Guanyu & Zhang, Jianmang, 2022. "Suitability evaluation system for the shallow geothermal energy implementation in region by Entropy Weight Method and TOPSIS method," Renewable Energy, Elsevier, vol. 184(C), pages 564-576.
    20. Walch, Alina & Li, Xiang & Chambers, Jonathan & Mohajeri, Nahid & Yilmaz, Selin & Patel, Martin & Scartezzini, Jean-Louis, 2022. "Shallow geothermal energy potential for heating and cooling of buildings with regeneration under climate change scenarios," Energy, Elsevier, vol. 244(PB).
    21. Miocic, Johannes M. & Krecher, Marc, 2022. "Estimation of shallow geothermal potential to meet building heating demand on a regional scale," Renewable Energy, Elsevier, vol. 185(C), pages 629-640.
    22. Sharma, P. & Al Saedi, A.Q. & Kabir, C.S., 2020. "Geothermal energy extraction with wellbore heat exchanger: Analytical model and parameter evaluation to optimize heat recovery," Renewable Energy, Elsevier, vol. 166(C), pages 1-8.
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    24. Korhonen, Kimmo & Markó, Ábel & Bischoff, Alan & Szijártó, Márk & Mádl-Szőnyi, Judit, 2023. "Infinite borehole field model—a new approach to estimate the shallow geothermal potential of urban areas applied to central Budapest, Hungary," Renewable Energy, Elsevier, vol. 208(C), pages 263-274.

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