Open-loop groundwater heat pumps development for large buildings: A case study |
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Authors: | Stefano Lo Russo Massimo Vincenzo Civita |
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Affiliation: | aPolitecnico di Torino – Dipartimento di Ingegneria del Territorio, dell’Ambiente e delle Geotecnologie (DITAG), Corso Duca degli Abruzzi, 24 – 10129 Torino, Italy |
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Abstract: | A study of the feasibility of providing the heating and cooling needs of the new, large commercial building near Turin, Italy, by means of an open-loop indirect groundwater heat pump (GWHP) system is described. A finite element subsurface flow and transport simulator (FEFLOW) was used to investigate possible configurations of extraction and injection wells for five different scenarios. Modelling results confirmed the hydrogeological capacity of the site to provide the necessary amount of groundwater and associated energy with limited environmental impact. Injection of warmer (or cooler) water in the aquifer creates a thermal plume whose dimensions and geometry depend on the properties of the subsurface formations, particularly their thermal dispersivity values. The study suggests that there are several possible well configurations that could support the GWHP system without adversely affecting the aquifer. |
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Keywords: | Geothermal Open-loop heat pumps Groundwater Thermodispersivity FEFLOW Italy |
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