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Environmental payback of renovation strategies in a northern climate - the impact of nuclear power and fossil fuels in the electricity supply
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Environmental Science. Högskolan Dalarna.ORCID iD: 0000-0003-2868-6481
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Environmental Science.ORCID iD: 0000-0002-5661-2917
Umeå universitet.
2019 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 13, no 1, article id 80Article in journal (Refereed) Published
Abstract [en]

The aim of this study is to assess how the use of fossil and nuclear power in different renovation scenarios affects the environmental impacts of a multi-family dwelling in Sweden, and how changes in the electricity production with different energy carriers affect the environmental impact. In line with the Paris Agreement, the European Union has set an agenda to reduce greenhouse gas emissions by means of energy efficiency in buildings. It is estimated that by the year 2050, 80% of Europe's population will be living in buildings that already exist. This means it is important for the European Union to renovate buildings to improve energy efficiency. In this study, eight renovation scenarios, using six different Northern European electricity mixes, were analyzed using the standard of the European Committee for Standardization for life cycle assessment of buildings. This study covers all life cycle steps from cradle to grave. The renovation scenarios include combinations of photovoltaics, geothermal heat pumps, heat recovery ventilation, and improvement of the building envelope. The results show that while in some electricity mixes a reduction in the global warming potential can be achieved, it can be at the expense of an increase in radioactive waste production, and, in mixes with a high share of fossil fuels, the global warming potential of the scenarios increases with time, compared with that of the original building. It also shows that in most electricity mixes, scenarios that reduce the active heat demand of the building end up in reducing both the global warming potential and radioactive waste, making them less sensitive to changes in the energy system. 

Place, publisher, year, edition, pages
MDPI , 2019. Vol. 13, no 1, article id 80
Keywords [en]
Building renovation, District heating, Electricity production, Greenhouse gasses, Life cycle assessment, Radioactive waste, Buildings, Electric power generation, Energy efficiency, Fossil fuels, Gas emissions, Geothermal energy, Geothermal heat pumps, Global warming, Greenhouse gases, Nuclear energy, Nuclear fuels, Radioactive wastes, Radioactivity, Waste heat, Electricity supply, Energy efficiency in buildings, European committee for standardizations, Global warming potential, Life Cycle Assessment (LCA), Multi-family dwelling, Life cycle
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:hig:diva-31399DOI: 10.3390/en13010080ISI: 000520425800080Scopus ID: 2-s2.0-85077301830OAI: oai:DiVA.org:hig-31399DiVA, id: diva2:1384943
Note

This work was carried out under the auspices of the industrial post-graduate school Reesbe, which is financed by the Knowledge Foundation (KK-stiftelsen) and Byggpartner i Dalarna AB.

Available from: 2020-01-13 Created: 2020-01-13 Last updated: 2020-04-20Bibliographically approved

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Ramirez Villegas, RicardoEriksson, Ola

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