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...
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| Tipo de recurso: | tesis de maestría |
| 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:2117/443416 |
| Acceso en línea: | https://hdl.handle.net/2117/443416 |
| Access Level: | acceso abierto |
| Palabra clave: | Architecture and energy conservation Renewable energy sources Mathematical optimization Decision-making Arquitectura i estalvi d'energia Energies renovables Optimització matemàtica Decisió, Presa de Àrees temàtiques de la UPC::Edificació Àrees temàtiques de la UPC::Energies |
| 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, lowcomplexity 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 Energy Efficiency Directive (EED) and 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-bystep retrofitting plan tailored to the priorities set by the university governing board. The results indicate that installing photovoltaic panels is the most cost-effective strategy for reducing energy bills while also complying with the requirements of the Energy Efficiency Directive (EED) and the revised Energy Performance of Buildings Directive (EPBD). Replacing natural gas boilers entirely with biomass boilers, with an investment of €2.6 million, would cut heating energy consumption by 92%, supporting EPBD energy efficiency thresholds and advancing the transition to zero-emission buildings by 2050. In accordance with the EED, UPC must replace outdated boilers and upgrade conventional lighting systems to LEDs to renovate at least 3% of its total building floor area annually. This equates to refurbishing 8,700 m² per year, at a projected cost of €159,000 over four years. The overall strategy targets a gradual reduction in energy consumption, aiming for a 1.5% decrease by 2026 (estimated savings of €335,000) and a 1.9% decrease by 2028 (estimated savings of €419,000). 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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