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Integrating passive energy efficient measures to the building envelope of a multi-apartment building in Sweden: analysis of final energy savings and cost effectiveness
Department of Built Environment and Energy Technology, Linnaeus University, Växjö, Sweden.
Department of Building Technology, Linnaeus University, Växjö, Sweden.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Institutionen för tillämpad fysik och elektronik.ORCID-id: 0000-0002-0588-9510
Department of Built Environment and Energy Technology, Linnaeus University, Växjö, Sweden.
2023 (engelsk)Inngår i: Buildings, E-ISSN 2075-5309, Vol. 13, nr 10, artikkel-id 2654Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A major challenge in building energy renovation is to cost effectively achieve notable energy savings. This paper investigates cost-effective passive energy-efficiency measures for thermal envelope retrofit of a typical Swedish multi-apartment building from the 1970s. Here, the use of different types of insulation materials for the retrofits of roof, exterior walls, and ground floor are analyzed along with changing windows and doors with varying thermal transmittance values. The cost-effectiveness analysis is based on the net present value of the investment costs of the energy-efficiently measures and the achieved energy cost saving. Different economic scenarios and renovation cases are considered in techno-economic analyses to determine the cost-effective energy-efficiency retrofit measures. The results indicate that improved windows reduce energy demand for space heating by up to 23% and yield the highest final energy savings. However, additional mineral wool roof insulation is the most cost-effective measure under all economic scenarios. This measure gave the lowest ratio of cost effectiveness of about 0.1, which was obtained under the stable scenario. The final energy savings that can be achieved in a cost-effective manner vary between 28% and 61%, depending on the economic scenario and renovation case. This analysis emphasizes the influence of different renovation cases and economic parameters on the cost effectiveness of passive energy-efficiency measures.

sted, utgiver, år, opplag, sider
MDPI, 2023. Vol. 13, nr 10, artikkel-id 2654
Emneord [en]
building envelope, economic analysis, energy renovation, heat-saving measures, Swedish multi-dwelling building
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-216188DOI: 10.3390/buildings13102654Scopus ID: 2-s2.0-85175029367OAI: oai:DiVA.org:umu-216188DiVA, id: diva2:1810774
Tilgjengelig fra: 2023-11-09 Laget: 2023-11-09 Sist oppdatert: 2024-01-17bibliografisk kontrollert

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