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  • 1.
    Lidberg, Tina
    et al.
    Högskolan Dalarna.
    Gustafsson, Marcus
    Högskolan Dalarna; KTH.
    Myhren, Jonn Are
    Högskolan Dalarna.
    Olofsson, Thomas
    Högskolan Dalarna; Umeå universitet.
    Ödlund, L.
    Linköpings universitet.
    Environmental impact of energy refurbishment of buildings within different district heating systems2018Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 227, s. 231-238Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The refurbishment of existing buildings is often considered a way to reduce energy use and CO2 emissions in the building stock. This study analyses the primary energy and CO2 impact of refurbishing a multi-family house with different refurbishment packages, given various district heating systems. Four models of typical district heating systems were defined to represent the Swedish district heating sector. The refurbishment packages were chosen to represent typical, yet innovative ways to improve the energy efficiency and indoor climate of a multi-family house. The study was made from a system perspective, including the valuation of changes in electricity use on the margin. The results show a significant difference in primary energy use for the different refurbishment packages, depending on both the package itself as well as the type of district heating system. While the packages with heat pumps had the lowest final energy use per m2 of floor area, air heat recovery proved to reduce primary energy use and emissions of CO2-equivalents more, independent of the type of district heating system, as it leads to a smaller increase in electricity use.

  • 2.
    Lidberg, Tina
    et al.
    Högskolan Dalarna.
    Swing Gustafsson, Moa
    Högskolan Dalarna; KTH.
    Myhren, Jonn Are
    Högskolan Dalarna.
    Olofsson, Thomas
    Högskolan Dalarna; Umeå universitet.
    Trygg, Louise
    Linköpings universitet.
    Comparing different building energy efficiency refurbishment packages performed within different district heating systems2017Inngår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 1719-1724Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This study analyses the differences in primary energy (PE) use of a multi-family building refurbished with different refurbishment packages situated in different district heating systems (DHS). Four models of typical DHS are defined to represent the Swedish DH sector. The refurbishment packages are chosen to represent typical, yet innovative ways to improve the energy efficiency of a representative multi-family building in Sweden. The study was made from a broad system perspective, including valuation of changes in electricity use on the margin. The results show a significant difference in PE savings for the different refurbishment packages, depending on both the package itself as well as the type of DHS. Also, the package giving the lowest specific energy use per m2 was not the one which saved the most PE. © 2017 The Authors.

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