95402 20221004075838.0 doi 10.3390/su12125152 sideral 119208 ART-2020-119208 eng García-Gil, A. Nested shallow geothermal systems 2020 Access copy available to the general public Unrestricted The long-term sustainability of shallow geothermal systems in dense urbanized areas can be potentially compromised by the existence of thermal interfaces. Thermal interferences between systems have to be avoided to prevent the loss of system performance. Nevertheless, in this work we provide evidence of a positive feedback from thermal interferences in certain controlled situations. Two real groundwater heat pump systems were investigated using real exploitation data sets to estimate the thermal energy demand bias and, by extrapolation, to assess the nature of thermal interferences between the systems. To do that, thermal interferences were modelled by means of a calibrated and validated 3D city-scale numerical model reproducing groundwater flow and heat transport. Results obtained showed a 39% (522 MWh·yr-1) energy imbalance towards cooling for one of the systems, which generated a hot thermal plume towards the downgradient and second system investigated. The nested system in the hot thermal plume only used groundwater for heating, thus establishing a positive symbiotic relationship between them. Considering the energy balance of both systems together, a reduced 9% imbalance was found, hence ensuring the long-term sustainability and renewability of the shallow geothermal resource exploited. The nested geothermal systems described illustrate the possibilities of a new management strategy in shallow geothermal energy governance. info:eu-repo/grantAgreement/EC/H2020/731166/EU/Establishing the European Geological Surveys Research Area to deliver a Geological Service for Europe/GeoERA This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 731166-GeoERA info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 3.251 2020 ENVIRONMENTAL SCIENCES 124 / 273 = 0.454 2020 Q2 T2 ENVIRONMENTAL STUDIES 60 / 125 = 0.48 2020 Q2 T2 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 30 / 44 = 0.682 2020 Q3 T3 GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY 6 / 9 = 0.667 2020 Q3 T3 0.611 2020 Energy Engineering and Power Technology 2020 Q1 Environmental Science (miscellaneous) 2020 Q1 Renewable Energy, Sustainability and the Environment 2020 Q1 Management, Monitoring, Policy and Law 2020 Q1 Geography, Planning and Development 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Moreno, M.M. Schneider, E.G. Marazuela, M.A. Abesser, C. Lázaro, J.M. Universidad de Zaragoza (orcid)0000-0002-8235-9580 Navarro, J.A.S. Universidad de Zaragoza (orcid)0000-0001-8286-4088 2000 427 Universidad de Zaragoza Dpto. Ciencias de la Tierra Área Geodinámica Externa 12, 12 (2020), 12125152 [13 pp] Sustainability (Basel) Sustainability (Switzerland) 2071-1050 5115141 http://zaguan.unizar.es/record/95402/files/texto_completo.pdf Versión publicada 490281 http://zaguan.unizar.es/record/95402/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:95402 articulos driver 2022-10-03-13:32:54 ARTICLE