Energy consumption
Evolution of energy consumption
In 2025, there was a 13% increase in overall energy consumption, mainly due to less favourable weather conditions compared with the previous year. As for electricity, the increase was 6.2% (1,664,517 kWh), and for gas it was 38.8% (4,179,746 kWh) compared to the previous year in both cases. Energy expenditure has increased by 11% compared to 2025.
Emissions associated with this consumption (emissions attributable to gas, diesel and biomass, but not from the electricity consumed at the UAB, as this comes from certified renewable energy sources with a guarantee of origin) have increased by 38.5% compared to last year.
Renewable energy production in 2025 stood at 2,218,955 kWh, representing 4.8% of the UAB’s total energy consumption (electricity and gas).
Summary of total UAB consumption for the year 2025
Summary of total UAB consumption for the year 2025.
During 2023 the production of renewable energy at the UAB amounted to 1,804,618.79 kWh, which represents 4.07% of the total energy consumption (electricity and gas) of the UAB.
The technology that provides the greatest renewable production is the biomass boiler, installed in the Physical Activity Service building, with a production of 58% of the total. In second place is photovoltaic solar energy, which is increasing its production as the photovoltaic solar plants implemented in recent years are brought into service. Specifically, in 2023 we have had in operation those of the School of Engineering, the Faculty of Veterinary Medicine as well as Computer Services, the Library of Humanities and the C3 odd spine of Sciences.
The production of renewable energy at the UAB has been growing year after year, with a significant leap in 2016 with the commissioning of the biomass boiler, in 2019 with the renewable energy production technologies of the ICTA-ICP building and later with the commissioning of the solar photovoltaic plants.
The decrease in renewable energy production in 2022 is due to a reduction in the energy demand of the SAF building, and therefore less use of the biomass boiler. The higher than average temperatures in the winter period have been the main cause of this reduction.