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A novel model for the estimation of thermal influence of neighbouring borehole heat exchangers
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik. (Ground Source Heat Pump Team)
KTH, Skolan för industriell teknik och management (ITM), Energiteknik, Tillämpad termodynamik och kylteknik. (Ground Source Heat Pump Team)ORCID-id: 0000-0002-0550-2769
2019 (Engelska)Ingår i: EUROPEAN GEOTHERMAL CONGRESS 2019: THE HAGUE, 11-14 JUNE 2019 / [ed] EGEC, 2019Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Ground source heat pumps (GSHPs) connected to vertical boreholes are popular systems to provide heat and/or refrigeration in residential and commercial buildings. The diffusion of these systems poses the question on how to effectively and sustainably handle the underground thermal resource without overexploiting it. In particular, this question can rise in densely populated areas where either heat extraction or heat rejection is dominant.Although several models are available and used to estimate the thermal influence between individual boreholes or group of hydraulically connected boreholes, the development of models that can quantify the thermal influence of neighbouring boreholes having different boundary conditions (it is the case for individual GSHP installations located in the same neighbourhood) is still at its early stages. The availability of such tools is essential both to enable the legislators to set appropriate rules for the allocation of the underground thermal resource and to enable the designers to properly size these systems.In this paper, we develop a model based on the stacked finite line source method that is tailored to estimate the thermal interaction of neighbouring GSHPs. The model takes as input the heat load of each GSHP and imposes uniform temperature on every borehole. The model is applied to a fictitious densely populated area to calculate the temperature changes on the boreholes walls of the systems. The results are compared with the results obtained with another model previously proposed by the authors.

Ort, förlag, år, upplaga, sidor
2019.
Nyckelord [en]
Ground source heat pumps, thermal influence, neighbouring boreholes, stacked finite line source
Nationell ämneskategori
Energiteknik
Identifikatorer
URN: urn:nbn:se:kth:diva-255168OAI: oai:DiVA.org:kth-255168DiVA, id: diva2:1338816
Konferens
European Geothermal Congress 2019
Anmärkning

QC 20190902

Tillgänglig från: 2019-07-24 Skapad: 2019-07-24 Senast uppdaterad: 2019-09-02Bibliografiskt granskad

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Lazzarotto, Alberto

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Fascì, Maria LetiziaLazzarotto, Alberto
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