From vision to action: Boosting building stock decarbonization
The decision to implement retrofitting measures in large portfolios of building stock depends on multiple factors such as the individual building characteristics (including age, existing energy sources and systems), economic considerations, including investment costs and available funds, and the org...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/428475 |
| Acceso en línea: | https://hdl.handle.net/2117/428475 https://dx.doi.org/10.1016/j.enbuild.2025.115692 |
| Access Level: | acceso abierto |
| Palabra clave: | Decision-making model Carbon–neutral building retrofitting Energy efficiency Building portfolio Energy savings Limited retrofitting budget Àrees temàtiques de la UPC::Edificació::Construcció sostenible Àrees temàtiques de la UPC::Energies::Eficiència energètica::Eficiència domèstica |
| Sumario: | The decision to implement retrofitting measures in large portfolios of building stock depends on multiple factors such as the individual building characteristics (including age, existing energy sources and systems), economic considerations, including investment costs and available funds, and the organization’s strategic priorities. This paper develops a novel, low-complexity decision-making model for fund allocation optimization in energy retrofitting across large-scale building portfolios. Using data from readily available energy performance certificates, the model reduces processing time and resource demands and is based not only on the organization’s self-defined priorities, but also on compulsory priorities to ensure compliance with the requirements of the new Energy Performance of Buildings Directive (EPBD). The model was applied to the Universitat Politècnica de Catalunya’s (UPC) portfolio of 50 buildings. It provides a step-by-step retrofitting plan tailored to the priorities set by the university governing board. The results identified photovoltaic panel installation as the most cost-effective strategy for reducing energy bills, which also meets the requirements of the new EPBD. Additionally, phasing out natural gas boilers and replacing them entirely with biomass boilers, with an investment of €2.6 million, would reduce heating energy consumption by 92%. This aligns with EPBD energy efficiency thresholds and facilitates the transition to zero-emission buildings by 2050. The model can be adapted to other (public or private) organizations that manage large portfolios of buildings in any context, with flexibility and scalability. |
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