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Ground Source Heat Pumps in Aosta Valley: Assessment and Mapping of Closed-Loop Geothermal Potential

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Ground Source Heat Pumps in Aosta Valley: Assessment and Mapping of Closed-Loop Geothermal Potential Ground Source Heat Pumps in Aosta Valley: assessment and mapping of closed-loop geothermal potential 07/11/2017 Alessandro Casasso and Simone Della Valentina (Politecnico di Torino) The GRETA project is co-financed by the European Regional Development Fund through the Interreg Alpine Space programme. W.P.4: Mapping + Large scale mapping: + Geological interferences: + Landslides + Water protection areas + Anhydrite, Halite + Karst areas + Mining areas, contaminated sites, landfills + Pilot areas mapping: + Assessment of existing plants + Geothermal potential 2 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Assessment of existing GSHP plants in Valle d’Aosta Database of energy Contacts with performance certificates practitioners: installers, of Regione V.d.A. designers and certifiers 62 GSHP plants: 42 closed loop 20 open loop Renewable energy Installed Power: Emissions avoid: production: 3.7 MW 840 ton CO2/year 6.5 GWh/year 3 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta G.POT algorithm Lithologies: Undisturbed ground • Thermal capacity 휆 (Wm-1K-1) temperature T0 (°C) • Thermal conductivity 휌푐 (Jm-3K-1) Plant characteristics: • Length of BHE L (m) -1 Length of heating season • Borehole thermal resistance Rb (mKW ) tc (s) • Life time of the plant ts (s) • Min/Max temperature Tlim (°C) 4 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Undisturbed ground temperature 5 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Length of heating season 6 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Geologic map of Valle d’Aosta Tectonic domains: Mont Blanc (MB), Briançonnais zone (Bz), Piemontais zone (Pz), Geologic map of Italy Sesia-Lanzo zone (SLz), Grand Paradis (GP), 1:500.000, ISPRA. Mont Rose (MR), Dent Blanche (DB). 7 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Thermal properties of the ground 8 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Geothermal potential of Valle d’Aosta Block of flat: 150 MWh/y + H.P. 70 kW=55 k€ + Courmayeur: 10 BHE 100m=50k€ + Chamois 13 BHE 100m=65k€ (+14%) + Aosta: 18 BHE 100m=90k€ (+38%) 9 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Conclusions + Existing GSHP plants in V.d.A.: + 62 plants (1/2070 inhab.): bigger open loop plants in valley bottom + Interesting diffusion of closed loop in high-mountain areas + Geothermal potential mapping: + Investment evaluation for BHE + Depends on: + Thermal properties of the ground + Thermal loads of buildings + BHE characteristics + Great variability depending on: + Thermal conductivity + Ground temperature 10 07 Nov. 2017 GRETA midterm conference. 07th November 2017, Salzburg. See more at www.alpine-space.eu/projects/greta Thanks for your attention See more at www.alpine-space.eu/projects/greta Find us on ________ Follow us on ________ Send us an email at [email protected].
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