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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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