Politecnico di Torino Porto Institutional Repository [Article] Assessment and mapping of the closed-loop shallow geothermal potential in Cerkno (Slovenia) Original Citation: Casasso, Alessandro; Pestotnik, Simona; Rajver, Dušan; Jež, Jernej; Prestor, Joerg; Sethi, Rajandrea (2017). Assessment and mapping of the closed-loop shallow geothermal potential in Cerkno (Slovenia). In: ENERGY PROCEDIA, vol. 125, pp. 335-344. - ISSN 1876-6102 Availability: This version is available at : http://porto.polito.it/2679662/ since: September 2017 Publisher: Elsevier Ltd. Published version: DOI:10.1016/j.egypro.2017.08.210 Terms of use: This article is made available under terms and conditions applicable to Open Access Policy Article ("["licenses_typename_cc_by_nc_nd_30_it" not defined]") , as described at http://porto.polito. it/terms_and_conditions.html Porto, the institutional repository of the Politecnico di Torino, is provided by the University Library and the IT-Services. The aim is to enable open access to all the world. Please share with us how this access benefits you. Your story matters. (Article begins on next page) Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect ScienceDirect Energy Procedia 00 (2017) 000–000 AvailableAvailable online online at at www.sciencedirect.com www.sciencedirect.com Energy Procedia 00 (2017) 000–000 www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia ScienceDirectScienceDirect EnergyEnergy Procedia Procedia 12500 (20(2017)17) 000335–344–000 www.elsevier.com/locate/procedia European Geosciences Union General Assembly 2017, EGU EuropeanDivision Geosciences Energy, Resources Union General & Environment, Assembly 2017, ERE EGU Division Energy, Resources & Environment, ERE Assessment and mapping of the closed-loop shallow geothermal AssessmentThe and15th Internationalmapping Symposiumof the closed-loop on District Heating shallow and Cooling geothermal potential in Cerkno (Slovenia) potential in Cerkno (Slovenia) AlessandroAssessing Casasso thea*, Simonafeasibility Pestotnik of busing, Dušan theRajver heatb, Jernej demand Ježb, Joerg-outdoor Prestor b, Alessandro Casassoa*, Simona Pestotnikb, Dušan Rajvera b, Jernej Ježb, Joerg Prestorb, temperature function for aRajandrea long-term Sethi districta heat demand forecast Rajandrea Sethi a,b,ca Politecnico di Torinoa – DIATI, corsoa Duca degli Abruzzib 24, 10129 Torino, Italyc c I. Andrić b Geological*a Politecnico, A. Pina Survey di Torino ,of P. Slovenia –Ferrão DIATI, (GEOZS), corso, J. Duca DimiFournier degličeva ulicaAbruzzi 14,., 24, B.1000 10129 Lacarrière Ljubljana, Torino, Slovenia Italy, O. Le Corre b Geological Survey of Slovenia (GEOZS), Dimičeva ulica 14, 1000 Ljubljana, Slovenia aIN+ Center for Innovation, Technology and Policy Research - Instituto Superior Técnico, Av. Rovisco Pais 1, 1049-001 Lisbon, Portugal bVeolia Recherche & Innovation, 291 Avenue Dreyfous Daniel, 78520 Limay, France c Abstract Département Systèmes Énergétiques et Environnement - IMT Atlantique, 4 rue Alfred Kastler, 44300 Nantes, France Abstract The economic viability of Borehole Heat Exchangers (BHEs) depends on the ability of the ground to exchange heat, and maps of theTheAbstract shalloweconomic geothermal viability of potential Borehole are Heat therefore Exchangers usef (BHEs)ul planning depends tools on for the futureability installations.of the ground Into exchthis angework, heat, we andpresent maps the of assessmentthe shallow of geothermal shallow geothermal potential potentialare therefore in Cerkn usefo,ul a planningmountain tools town forof 5,000future inhabitants installations. in westernIn this Slovenia.work, we Thepresent recently the developedassessmentDistrict heating G.POT of shallow networksmethod geothermal was are applied,commonly potential taking addressed in intoCerkn acco, inount a themountain site-specific literature town as ground ofone 5,000 of thermal the inhabitants most parameters effective in western and solutions us Slovenia.age profiles for decreasingThe depending recently the ondevelopedgreenhouse climate G.POTconditions. gas emissions method This was fromwork applied, theis partbuilding taking of the sector.into EU- accfunded Theseount site-specificprojectsystems GRETA, require ground highaiming thermal investments at supporting parameters which the and are diff us returnedusionage profiles of through GSHPs depending the in theheat Alpineonsales climate. territory.Due conditions. to the changed This work climate is part conditions of the EU- andfunded building project renovation GRETA, policies, aiming atheat supporting demand the in diffthe usionfuture of couldGSHPs decrease, in the Alpineprolonging territory. the investment return period. © The 2017 main The scope Authors. of this Published paper is by to Elsevierassess the Ltd. feasibility of using the heat demand – outdoor temperature function for heat demand Peer-review© 2017 The Authors.under responsibility Published by of Elsevierthe scientific Ltd. committee of the European Geosciences Union (EGU) General Assembly 2017 Peer-reviewforecast. The under district responsibility of Alvalade, of the located scientific in Lisboncommittee (Portugal), of the European was used Geosciences as a case study.Union (EGU)The district General is consistedAssembly of 665 –Peer-review Division Energy, under responsibilityResources and of the the Environment scientific committee (ERE). of the European Geosciences Union (EGU) General Assembly 2017 2017buildings – Division that varyEnergy, in bothResources construction and the periodEnvironment and typology. (ERE). Three weather scenarios (low, medium, high) and three district –renovation Division Energy, scenarios Resources were developed and the Environment (shallow, intermediate, (ERE). deep). To estimate the error, obtained heat demand values were Keywords:compared Geothermal with results potential; from a Ground dynamic Source heat Heat demand Pump, model, Borehole previously Heat Exchanger; developed Cerkno and validated by the authors. Keywords:The results Geothermal showed potential;that when Ground only weatherSource Heat change Pump, is Bor considered,ehole Heat theExchanger; margin Cerknoof error could be acceptable for some applications (the error in annual demand was lower than 20% for all weather scenarios considered). However, after introducing renovation * Corresponding author. Tel.: +39-0110907622; fax: +39-0110907699. scenar*E-mail Correspondingios, address: the error [email protected] author. value Tel.: increased +39-0110907622; up to 59.5% fax: +39-0110907699.(depending on the weather and renovation scenarios combination considered). TheE-mail value address: of slope [email protected] coefficient increased on average within the range of 3.8% up to 8% per decade, that corresponds to the decrease in the number of heating hours of 22-139h during the heating season (depending on the combination of weather and 1. Introduction 1.renovationIntroduction scenarios considered). On the other hand, function intercept increased for 7.8-12.7% per decade (depending on the coupled scenarios). The values suggested could be used to modify the function parameters for the scenarios considered, and improveIn recent the accuracyyears, the of heatEuropean demand Union estimations. set the ambitious “20-20-20” strategy to cut 20% of the primary energy consumptionIn recent years,and 20% the ofEuropean the greenhouse Union setgas the (GHG) ambitio emiusssions “20-20-20” compared strategy to 1990 to andcut 20%to cover of the20% primary of the eneenergyrgy demandconsumption© 2017 Thewith Authors. andrenewable 20% Published of sources the greenhouseby Elsevier[1]. Heating Ltd gas. (GHG)and cool emiingssions of buildings compared account to 1990 for andabout to 40%cover of 20% the oftotal the primary energy energydemandPeer-review consumption with under renewable responsibility [2], sourcesand the of the[1].building Scientific Heating sector Committeeand has cool largeingof The ofmargins buildings 15th International of improvement account Symposium for aboutboth onfor40% District energy of the Heating savin totalg andprimaryand for theenergyCooling implementation consumption. of[2], renewable and the building energy sources.sector has Woo largedy biomassmargins ofis oftenimprovement the cheapest both fuelfor energy for building saving heating,and for the implementation of renewable energy sources. Woody biomass is often the cheapest fuel for building heating, Keywords: Heat demand; Forecast; Climate change 1876-6102 © 2017 The Authors. Published by Elsevier Ltd. 1876-6102Peer-review © 2017under The responsibility Authors. Published of the by scientific Elsevier committeeLtd. of the European Geosciences Union (EGU) General Assembly 2017 –Peer-review Division Energy, under responsibilityResources and of the the Environment scientific committee (ERE). of the European Geosciences Union (EGU) General Assembly 2017 – Division Energy, Resources and the Environment (ERE). 1876-6102 © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the Scientific Committee of The 15th International Symposium on District Heating and Cooling. 1876-6102 © 2017 The Authors. Published by Elsevier Ltd. Peer-review under responsibility of the scientific committee of the European Geosciences Union (EGU) General Assembly 2017 – Division Energy, Resources and the Environment (ERE). 10.1016/j.egypro.2017.08.210 10.1016/j.egypro.2017.08.210 1876-6102 336 Alessandro Casasso et al.