The new Geo-SIV program for geothermal exchange systems

The Geo-SIV application (v1.3, 2023) is a self-portable program developed by the ICGC in collaboration with the Universitat Politècnica de Catalunya distributed under the CC-BY license.

Geo-SIV allows performing preliminary evaluations of geothermal heat exchange systems in vertical closed loop systems for heating, cooling and domestic hot water (DHW) installations of up to 70 kW (types A and B of the UNE-100715-2014 standard) in the territory of Catalonia.

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Tool subject to a Creative Commons Attribution 4.0 International license.   More information

Functionalities of Geo-SIV

The new software allows introducing the thermal loads and the demand for cold, heat and DHW or calculate it (for simplified cases) by realizing an adaptation of the bin method (RETScreen ®, Natural Resources Canada 2016).

Geo-SIV calculates the necessary number of heat exchangers (closed loop vertical wells) based on the Kelvin linear source theory. This is also the basis of the methodology developed by the International Ground Source Heat Pump Association (IGSHPA) and by the Instituto para la Diversificación y el Ahorro Energético (IDAE, 2012).

For the design of the heat exchangers, Geo-SIV allows specifying between types of single or double probes, their parameters and the distance between them. The characteristics of the geothermal heat pumps are selected from an internal database or can be introduced by the user. The tool uses geological and climatological data published in the Geoíndex-Surface geothermal of Catalonia (ICGC, 2018). For the specific area of Girona, it incorporates geoinformation based on the results of the MUSE (GeoERA H2020 Era-Net, 2018-2021).

Geo-SIV has an economic and environmental analysis module that allows comparing the projected solution based on shallow geothermal energy with respect to other renewable and non-renewable technologies and calculates the amortization period of the extra investment involved as well as emission savings. It also makes possible to contemplate the possibility of hybridizing the thermal energy production facility with photovoltaic energy and battery systems.

The output data can be used for pre-feasibility studies.

The code has been programmed using MATLAB software (created with version 2020a, adapted and successfully tested up to version 2022b).

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Flux de treball Geo-SIV amb una interfície gràfica intuitiva

Distribució del programari

Geo-SIV es distribueix com a programa executable compilat per a Microsoft Windows™.

La versió actual de Geo-SIV v1.3 (Novembre 2023), es pot descarregar mitjançant un fitxer comprimit *.zip (Geo-SIV_v1.3; 103 MB) que conté:

• L’aplicació Geo-SV (exe)
• Guia ràpida d’ús v.1.3 (pdf)

(*) NOTA: Geo-SIV té en compte diversos paràmetres que l'usuari pot editar. La precisió de la informació de base utilitzada per establir els valors per defecte d’aquests paràmetres pot ser molt variable en funció de la font origen de la informació. Es recomana que l’usuari verifiqui sempre aquests valors que per defecte proposa el programari i realitzi diverses simulacions considerant la seva variabilitat.

Programme referencei

J. García-Céspedes, I.Herms, G.Arnó, J.Ariza, J.J.De Felipe (2023). Geo-SIV (v1.3) [programari]. Institut Cartogràfic i Geològic de Catalunya. CC-BY 4.0.

References

AENOR UNE-100715:2014 (2014): “Diseño, ejecución y seguimiento de una instalación geotérmica somera. Parte 1: Sistemas de circuito cerrado vertical”. Disponible a través del següent enllaç: https://www.une.org/encuentra-tu-norma/busca-tu-norma/norma?c=N0052899

AENOR UNE-EN 14511-1:2019 (2019): “Acondicionadores de aire, enfriadoras de líquido y bombas de calor para la calefacción y la refrigeración de locales y enfriadoras de proceso con compresores accionados eléctricamente. Parte 1: Términos y definiciones”.

Ariza, J. (2020). “Implementation of methodologies for calculating vertical Borehole Heat Exchangers (BHE) lengths for Ground source heat pumps (GSHP) systems in MATLAB: Design of an App”. Thesis of the Master’s degree on Energy Engineering. School of Industrial Engineering of Barcelona. Tutors / directors: De Felipe, J,; Herms I. https://upcommons.upc.edu/bitstream/handle/2117/333862/tfm-javier-ariza-vdef.pdf?sequence=1&isAllowed=y.

ASHRAE (American Society of Heating, Refrigerating, and Air Conditioning Engineers) (1985): “ASHRAE Handbook of Fundamentals Volume”.

ICGC (2018): “Geoíndex. Geotèrmia superficial”. Disponible a través del següent enllaç: www.icgc.cat/ca/Administracio-i-empresa/Eines/Visualitzadors-Geoindex/Geoindex-Geotermia-superficial.

IDAE (Instituto para la Diversificación y el Ahorro Energético) (2012): “Guía técnica de diseño de sistemas de intercambio geotérmico de circuito cerrado”. Disponible a través del següent enllaç: https://www.idae.es/publicaciones/guia-tecnica-diseno-de-sistemas-de-intercambio-geotermico-de-circuito-cerrado

Ingersoll, L.R.; Plass, H.J. (1948): “Theory of the ground pipe heat source for the heat pump”. ASHVE Trans., 47: 339-348.

IGSHPA (International Ground Source Heat Pump Association) (2009): “Ground source heat pump residential and light commercial: design and installation guide”.

García-Céspedes, J.; Herms, I.; Arnó, G.; Ariza, J.; De Felipe, J. J. (2022): Geo-SIV (v1.1) [programari]. Institut Cartogràfic i Geològic de Catalunya i Universitat Politècnica de Catalunya. CC-BY 4.0.

MITMA (Ministerio de Transportes, Movilidad y Agencia Urbana) (2019): “Código Técnico de la Edificación (CTE). Documento Básico HE Ahorro de energía (HE)”.

NRCAN (Ministry of Natural Resources, Canada) (2005): “RETScreen® International: Clean Energy Decision Support Centre. Ground-Source Heat Pump Project Analysis”. Disponible a través del següent enllaç: https://publications.gc.ca/collections/Collection/M39-111-2005E.pdf.

NRCAN (Ministry of Natural Resources, Canada) (2016): “RETScreen® International: RETScreen Clean Energy Management Software”. Disponible a través del següent enllaç: www.nrcan.gc.ca/maps-tools-and-publications/tools/modelling-tools/retscreen/7465.

Yang, H.; Cui, P.; Fang, Z. (2019): “Vertical-borehole ground-coupled heat pumps: A review of models and Systems”, Applied Energy, 87: 16-27.

For more information on the Geo-SIV program, you can contact: geotermia@icgc.cat.