Energy consumption and indoor climate in a residential building before and after comprehensive energy retrofitting

Thomsen, Kirsten Engelund; Rose, Jørgen; Mørck, Ove; Jensen, Søren Østergaard; Østergaard, Iben; Knudsen, Henrik Nellemose; Bergsøe, Niels Christian

doi:10.1016/j.enbuild.2016.04.049

Cited by 88 publications

(48 citation statements)

References 2 publications

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“…Numbers are all collected from [53] unless otherwise indicated. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].8°C in the reference zones, which is lower than the recommended indoor temperature in Sweden of 21°C. In 2015 and after the renovation was performed, the building used 49.4 MWhDH.…”

Section: Resource and Climate Impactsmentioning

confidence: 99%

“…Significant energy use reductions were also seen in the renovations where solar installations have been implemented. [11] Gothenburg, Sweden Gårdsten X X X X 263 145 45% [11] Gothenburg, Sweden Katjas gata X X 178 52 71% [11] Linköping, Sweden Magistratshagen X X 131 80 39% [12] Halmstad, Sweden Maratonvägen X X 145 92 37% [13,14] Hvalso, Denmark Traneparken X X X 139 96 31% [15] Roskilde, Denmark Sems Have X X X 156 51 67% [13,14] Kapfenberg, Austria Kapfenberg X X X X 146 46 68% [13,14] Vilnius, Estonia Project I-464 X X 212 132 38% [16] * including domestic hot water…”

Section: Introductionmentioning

confidence: 99%

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Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Fleur

Moshfegh

Rohdin

2017

Energy and Buildings

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 Energy use and indoor climate of a building are studied before and after a renovation  The study numerically predicts, validates and evaluates energy use and indoor climate  Energy demand is reduced by 44% after renovation and indoor climate is improved  Assumed user behavior has significant impact on estimated energy-saving potential  System boundary affects climate and resource impact from selected renovation measures

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Section: Resource and Climate Impactsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Fleur

Moshfegh

Rohdin

2017

Energy and Buildings

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“…In the same way as the straw in the eco-construction, project partners wish to valorize flax shives as a bio-based insulation material. Moreover, from an economic point of view, a circular economy approach could be an alternative solution in the global energy context [1,2,3]. The principle is to valorize local natural resources and to use them within the framework of short circuits of distribution [4].…”

Section: Introductionmentioning

confidence: 99%

Hygrothermal behaviour of flax shives used as insulation material in an attic of a traditional house

et al. 2020

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Western Europe area is one of the world regions where traditionally flax is grown. Whether in France or Belgium, flax is mainly used for the production of fabrics. When separating the different components of the plant, small woody elements called shives which represented about 50% of the production, are recovered. This work aims to study the behavior of flax shives used as insulation material in an attic of a French Flanders traditional house. Main scientific issues related to the study of heat and mass transfer is to determine the evolution of the thermal characteristics of the material and its durability. First, we propose a laboratory analysis of the hygrothermal behavior of shives by conventional thermal methods for characterizing thermal conductivity and volumetric heat (heat flux method), sorption curve is also determined. Then we focus on an experimental site which is an independent house where the old insulation of the attic in glass wool was replaced by flax shives. The hygrothermal behavior of this new insulation was monitored with humidity and temperature sensors for ten months. The thermal performances determined for a raw form of the shives in the laboratory are encouraging and hygrometric results show advantageous behavior whatever the season.

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“…: Thomsen et al (2016) and Thomsen et al (2015), who studied energy use and indoor environment of a residential building in Denmark before and after a comprehensive renovation. The renovation resulted in new facades, new windows, additional insulation, mechanical ventilation with heat recovery and a photovoltaic installation on the roof.…”

Section: Building Renovation -Non-listed Buildingsmentioning

confidence: 99%

A systematic approach for major renovation of residential buildings

Liu

2017

Linköping Studies in Science and Technology. Dissertations

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In Sweden, buildings are responsible for about 40 % of total energy use and about 10 % of total CO 2 emissions. Today more than 60 % of existing Swedish residential buildings are over 40 years old and are in need of major renovation. In addition, 15 % of all multi-family buildings and 27 % of all single-family houses were built before 1945. The increased energy use and threat from CO 2 emissions of the building sector create a need for energy efficiency. The important role that renovation of residential buildings will play in reducing the total energy used by the Swedish building sector as well as in reducing primary energy use and CO 2 emissions on both the national and global levels has been the impetus for the studies included in this thesis.The aim of the current research is to develop a methodology from a system perspective which can be used to analyze the energy use, optimal life cycle cost (LCC), energy efficiency measure (EEM) package, indoor environment, CO 2 emissions, and primary energy use of a building or a community during major renovation. The developed methodology accomplished at three different levels, i.e. building level, cluster level and district level. The methodology considers both energy efficiency and economic viability during building renovation and will also play an important role in overall urban planning. The studied buildings include both nonlisted and listed residential buildings and the tools used include building energy simulation (BES), survey, technical measurements, LCC optimization and building categorization.The results show that the combination of BES, technical measurements and surveys provides a holistic approach for evaluation of energy use and indoor environment of the studied residential buildings. The results from the current study also show that the 2020 energy target, i.e., reduction of energy use by 20 %, for the building sector can be achieved by all the studied building types and that the total LCC of these buildings are below the cost-optimal point. In comparison, the 2050 energy target, i.e., reduction of energy use by 50 %, for the building sector may be achieved by the non-listed buildings, but when the constraints relevant to listed buildings are added the cost-optimality changes as some EEMs in direct conflict with the building's heritage value may not be implemented.The investigation of primary energy use and CO 2 emissions by the residential buildings show that the higher the energy saving, the lower the primary energy use becomes, and vice versa. With the same energy saving, the heating system with higher primary energy factor results in higher primary energy use. From a CO 2 emissions point of view, EEM packages proposed to help buildings connected to a CHP based district heating system, to reduce the energy use or LCC are not consistently effective. Since these EEM packages will reduce district heating demand, the electricity produced in the CHP plant will also decrease. When the biomass is considered a limited resource, measures such as investm...

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Energy consumption and indoor climate in a residential building before and after comprehensive energy retrofitting

Cited by 88 publications

References 2 publications

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

Hygrothermal behaviour of flax shives used as insulation material in an attic of a traditional house

A systematic approach for major renovation of residential buildings

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