Methodological approach for evaluating the geo-exchange potential: VIGOR Project

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Antonio Galgaro *
Eloisa Di Sipio
Elisa Destro
Sergio Chiesa
Vito Uricchio
Delia Bruno
Rita Masciale
Nicola Lopez
Pasquale Iaquinta
Giordano Teza
Giulio Iovine
Domenico Montanari
Adele Manzella
Sergio Soleri
Roberto Greco
Guido Di Bella
Salvatore Monteleone
Maria Sabatino
Marina Iorio
Emanuela Petruccione
Aurelio Giaretta
Giorgio Tranchida
Eugenio Trumpy
Gianluca Gola
Stefania D'Arpa
(*) Corresponding Author:
Antonio Galgaro | antonio.galgaro@unipd.it

Abstract

In the framework of VIGOR Project, a national project coordinated by the Institute of Geosciences and Earth Resources (CNR-IGG) and sponsored by the Ministry of Economic Development (MiSE), dedicated to the evaluation of geothermal potential in the regions of the Convergence Objective in Italy (Puglia, Calabria, Campania and Sicily), is expected to evaluate the ability of the territory to heat exchange with the ground for air conditioning of buildings. To identify the conditions for the development of low enthalpy geothermal systems collected and organized on a regional scale geological and stratigraphic data useful for the preparation of a specific thematic mapping, able to represent in a synergistic and simplified way the physical parameters (geological, lithostratigraphic, hydrogeological, thermodynamic) that most influence the subsoil behavior for thermal exchange. The litho-stratigraphic and hydrogeological database created for every region led to the production of different cartographic thematic maps, such as the thermal conductivity (lithological and stratigraphical), the surface geothermal flux, the average annual temperature of air, the climate zoning, the areas of hydrogeological restrictions. To obtain a single representation of the geo-exchange potential of the region, the different thematic maps described must be combined together by means of an algorithm, defined on the basis of the SINTACS methodology. The purpose is to weigh the contributions of the involved parameters and to produce a preliminary synthesis map able to identify the territorial use of geothermal heat pump systems, based on the geological characteristics and in agreement with the existing regulatory constraints.

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