PORTO @ 
Archivio Istituzionale della Ricerca
IRIS è la soluzione IT che facilita la raccolta e la gestione dei dati relativi alle attività e ai prodotti della ricerca. Fornisce a ricercatori, amministratori e valutatori gli strumenti per monitorare i risultati della ricerca, aumentarne la visibilità e allocare in modo efficace le risorse disponibili.
EnglishRemote northern communities of Nunavik rely on fossil fuels for space heating and domestic hot water production. The capital Kuujjuaq is characterized by 8500 heating degree days and discontinuous permafrost. Numerical simulations taking into account latent heat effects due to water-ice phase changes demonstrated that the 10-year performance of small-diameter borehole heat exchangers is as valuable as conventional diameters. Moreover, owing to the cold underground, deeper boreholes perform significantly better than shallow ones. A heat extraction rate of 35 W m-1 can be sustainably maintained by a 300-m borehole. The financial analysis showed that ground-source heat pumps are a viable alternative to fossil fuels. Absorption heat pump is the most interesting technology, but only district-scale applications could justify high drilling and installation costs of vertical ground heat exchangers. Payback time of 15 years was found at the current costs, but less than 10 years can be achieved at 150 CAD m-1 drilling cost.
Efficiency evaluation of borehole heat exchangers in Nunavik, Québec, Canada / Giordano, Nicolò; Riggi, Luca; Della Valentina, Simone; Casasso, Alessandro; Mandrone, Giuseppe; Raymond, Jasmin. - ELETTRONICO. - 2019-August(2019), pp. 4381-4388. ((Intervento presentato al convegno 25th IIR International Congress of Refrigeration tenutosi a Montréal (Canada) nel 24-30 agosto 2019.
| Titolo: | Efficiency evaluation of borehole heat exchangers in Nunavik, Québec, Canada |
| Autori: | |
| Data di pubblicazione: | 2019 |
| Abstract: | Remote northern communities of Nunavik rely on fossil fuels for space heating and domestic hot wa...ter production. The capital Kuujjuaq is characterized by 8500 heating degree days and discontinuous permafrost. Numerical simulations taking into account latent heat effects due to water-ice phase changes demonstrated that the 10-year performance of small-diameter borehole heat exchangers is as valuable as conventional diameters. Moreover, owing to the cold underground, deeper boreholes perform significantly better than shallow ones. A heat extraction rate of 35 W m-1 can be sustainably maintained by a 300-m borehole. The financial analysis showed that ground-source heat pumps are a viable alternative to fossil fuels. Absorption heat pump is the most interesting technology, but only district-scale applications could justify high drilling and installation costs of vertical ground heat exchangers. Payback time of 15 years was found at the current costs, but less than 10 years can be achieved at 150 CAD m-1 drilling cost. |
| Appare nelle tipologie: | 4.1 Contributo in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| Giordano et al_2019.pdf | pdf nel formato dell'editore | 2a Post-print versione editoriale / Version of Record | Non Pubblico - Accesso privato/ristretto | Administrator Richiedi una copia |
http://hdl.handle.net/11583/2836295
Copyright © 2020