Comprehensive investigation on energy retrofits in eleven multi-family buildings in Sweden

Liu, Linn; Moshfegh, Bahram; Akander, Jan; Cehlin, Mathias

doi:10.1016/j.enbuild.2014.08.044

Cited by 68 publications

(35 citation statements)

References 8 publications

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“…Liu et al [13] have studied the energy efficiency potential in multifamily buildings in the Gävleborg region by using measurements and simulations. In an article by Konstantinou and Knaack [14] several parameters related to energy use in a multi-family building have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Evaluating indoor environment of a retrofitted multi-family building with improved energy performance in Sweden

Liu

Rohdin

Moshfegh

2015

Energy and Buildings

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Section: Introductionmentioning

confidence: 99%

Evaluating indoor environment of a retrofitted multi-family building with improved energy performance in Sweden

Liu

Rohdin

Moshfegh

2015

Energy and Buildings

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“…LCA methodology has been applied to assess the environmental impacts of building retrofit actions [11][12][13][14][15][16]. This approach has also been applied to redesign the concept of NZEB with the aim of reaching an electricity target of net zero energy assuming that these type of buildings can heavily be influenced by the energy carrier weighting factors chosen [17].…”

Section: Introductionmentioning

confidence: 99%

Energy retrofit of historic buildings: Environmental assessment of cost-optimal solutions

Tadeu

Rodrigues

Tadeu

et al. 2015

Journal of Building Engineering

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a b s t r a c tThis paper describes the implementation of an integrated cost optimality and environmental assessment involving alternative energy efficiency retrofit packages for a building that dates from the beginning of the 20th century. A building typical of the building stock in the centre of Coimbra (located in the central region of Portugal and recently classified as a UNESCO World Heritage Site) was used to illustrate the methodology presented. The results were also analysed for the same building in two other locations. A life-cycle (LC) model was implemented to assess different energy efficiency measures for an apartment. The economic assessment complied with European Directive 2010/31/EU. The results show that the lowest life-cycle environmental impacts were obtained for insulation thicknesses between 50 and 120 mm, which are also cost-optimal. It is also shown that insulation thicknesses of more than 80 mm do not improve energy efficiency or global cost reduction. This paper shows that, even though historic buildings in Portugal do not have to comply with building energy codes, significant energy savings can be achieved for them without changing their historic character. It was also concluded that economic and environmental costs can both be minimised by choosing the most suitable energy efficiency retrofit measures.

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“…Furthermore, these studies showed that low-temperature radiator systems improve the energy performance of heat pumps. Liu et al [24] studied energy saving measures for multi-family houses in Gävle, Sweden. The study showed promising technical potential, although many of the studied measures were deemed unprofitable, in particular façade insulation, windows with low U-value and MVHR.…”

Section: Introductionmentioning

confidence: 99%

Techno-economic analysis of energy renovation measures for a district heated multi-family house

Gustafsson

Zhang

et al. 2016

Applied Energy

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Techno-economic analysis of energy renovation measures for a district heated multi-family house.Applied Energy, http://dx.doi.org/10.1016/j.apenergy. 2016.05.104 Access to the published version may require subscription. N.B. When citing this work, cite the original published paper. AbstractRenovation of existing buildings is important in the work towards increased energy efficiency and reduced environmental impact. The present paper treats energy renovation measures for a Swedish district heated multi-family house, evaluated through dynamic simulation. Insulation of roof and façade, better insulating windows and flow-reducing water taps, in combination with different HVAC systems for recovery of heat from exhaust air, were assessed in terms of life cycle cost, discounted payback period, primary energy consumption, CO₂ emissions and non-renewable energy consumption. The HVAC systems were based on the existing district heating substation and included mechanical ventilation with heat recovery and different configurations of exhaust air heat pump.Compared to a renovation without energy saving measures, the combination of new windows, insulation, flow-reducing taps and an exhaust air a heat pump gave up to 24% lower life cycle cost. Adding insulation on roof and façade, the primary energy consumption was reduced by up to 58%, CO₂ emissions up to 65% and non-renewable energy consumption up to 56%. Ventilation with heat recovery also reduced the environmental impact but was not economically profitable in the studied cases. With a margin perspective on electricity consumption, the environmental impact of installing heat pumps or air heat recovery in district heated houses is increased. Low-temperature heating improved the seasonal performance factor of the heat pump by up to 11% and reduced the environmental impact.

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Comprehensive investigation on energy retrofits in eleven multi-family buildings in Sweden

Cited by 68 publications

References 8 publications

Evaluating indoor environment of a retrofitted multi-family building with improved energy performance in Sweden

Evaluating indoor environment of a retrofitted multi-family building with improved energy performance in Sweden

Energy retrofit of historic buildings: Environmental assessment of cost-optimal solutions

Techno-economic analysis of energy renovation measures for a district heated multi-family house

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