| 1. |
- Blomsterberg, Åke, et al.
(författare)
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Energi- och Miljörenovering av miljonprogramshus - Backa Röd i Göteborg
- 2015
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Ingår i: Bygg & teknik. - 0281-658X. ; , s. 46-51
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Tidskriftsartikel (populärvet., debatt m.m.)abstract
- I Sverige finns ett stort bostadsbestånd som står inför ombyggnad. Miljonprogrammets bostäder är över 40 år gamla och behöver rustas upp. Det är angeläget att denna upprustning utformas på ett sådant sätt att husen byggs om till energieffektiva byggnader med låga framtida drifts- och uppvärmningskostnader och med låg miljöpåverkan under hela livscykeln. Det är i sammanhanget viktigt att energieffektivisering av byggnaderna genomförs samtidigt som husen renoveras för att åtgärderna ska kunna genomföras till rimliga kostnader. För detta behövs nya metoder för kostnadseffektiv energi- och miljörenovering. Sverige deltar i ett internationellt forskningsprojekt med detta syfte, IEA Annex 56.
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| 2. |
- Blomsterberg, Åke, et al.
(författare)
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Tenants Acceptance or Rejection of Major Energy Renovation of Block of Flats - IEA Annex 56
- 2015
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Ingår i: Energy Procedia. - : Elsevier BV. - 1876-6102. ; 78, s. 2346-2351
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Tidskriftsartikel (refereegranskat)abstract
- To meet EU energy and climate targets, energy efficiency of the existing building stock must be drastically improved. Within IEA EBC Annex 56 one of the best practice examples of energy renovations is a group of multi-family buildings in Sweden, recently thoroughly renovated. For this group of buildings the residents' perception of renovations and appraisal of implemented measures were captured by interviews with tenants and a literature review. Residents' possible acceptance of energy renovations are related to improvements that are directly experienced and visible. Resident participation is beneficial. Crucial is the collaboration between all stakeholders. Long-term environmental benefits or financial gains are arguments that might not be sufficient.
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| 3. |
- Blomsterberg, Åke, et al.
(författare)
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User acceptance of cost-effective energy and carbon emissions optimization in building renovation.
- 2015
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- To meet EU energy and climate targets, energy efficiency of the existing building stock must be drasticallyimproved. Within IEA ECB Annex 56 one of the best practice energy renovations is a group of multi-familybuildings in Sweden, recently thoroughly renovated. Residents' perception of renovations and appraisal ofimplemented measures were captured by interviews with tenants and a literature review. Residents'possible acceptance of energy renovations are related to improvements that are directly experienced andvisible. Resident participation is beneficial. Crucial is the collaboration between all stakeholders. Long-termenvironmental benefits or financial gains are arguments that might not be sufficient.
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| 4. |
- Ekström, Tomas, et al.
(författare)
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Cost-effective Passive House renovation packages for Swedish single-family houses from the 1960s and 1970s
- 2018
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Ingår i: Energy and Buildings. - : Elsevier BV. - 0378-7788. ; 161, s. 89-102
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Tidskriftsartikel (refereegranskat)abstract
- This paper evaluates the cost-effectiveness of renovating single-family houses to Passive House level, as compared to maintaining the existing buildings or renovating to building regulation level. The assessment involved life cycle cost analyses, and concerns the Swedish single-family housing stock constructed between 1961 and 1980, which accounts for about a third of Sweden’s two million single-family houses. These houses, now in need of major renovation, are represented in this study by two reference buildings. The results show that Passive House renovations can be cost-effective, but this largely depends on the type of heat generation used in the houses. The most cost-effective individual renovation measure was installing an exhaust air heat pump, and the least cost-effective was installing new windows. In houses using direct electric heating, the Passive House renovation package was the most cost-effective alternative.
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| 5. |
- Ekström, Tomas, et al.
(författare)
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Renovation of Swedish single-family houses from the 1960s and 1970s to net-zero energy buildings : Case study
- 2017
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Ingår i: ISES Solar World Congress 2017. - Freiburg, Germany : International Solar Energy Society. - 9783981465976 ; , s. 858-865
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Konferensbidrag (refereegranskat)abstract
- This paper evaluates whether a net-zero energy building (NZEB) can be attained by implementing on-site renewable electricity production when renovating to Passive House level. The assessment is based on the Swedish single-family housing stock constructed between 1961 and 1980, using two case study houses and three locations. Specific conditions of the houses, such as the type of heat generation and available roof area for installation of a photovoltaic system, determine whether a NZEB renovation is possible. Overall, the assessment showed that it is not cost-effective to aim for NZEB when implementing a PV system, based on the alternatives in this study.
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| 6. |
- EKSTRÖM, TOMAS, et al.
(författare)
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Renovation of Swedish Single-family Houses to Passive House Standard : Analyses of Energy Savings Potential
- 2016
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Ingår i: Energy Procedia : Sustainable Built Environment Tallinn and Helsinki Conference SBE16 - Sustainable Built Environment Tallinn and Helsinki Conference SBE16. - : Elsevier BV. ; 96, s. 134-145
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Konferensbidrag (refereegranskat)abstract
- A third of Sweden's two million single-family houses were built in the period 1961-1980, and many of them are in need of renovation. These houses have a high energy use and are in technical terms fairly homogenous. This investigation evaluates the theoretical energy savings potential of renovating houses from this period. Four reference houses were selected and simulated using common renovation measures. The results indicate that most of the existing single-family housing stock will likely not be able to attain the passive house standard after renovation and using today's technology. This is explained by the fact that some house characteristics impose a limiting factor on the energy renovation. Such examples are the shape, foundation and composition of the building envelope. Nevertheless, it is still possible to drastically reduce the final energy use by approximately 65-75%.
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| 7. |
- Ekström, Tomas, et al.
(författare)
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Renovation of Swedish single-family houses to passive house standard : Sensitivity analysis
- 2016
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Ingår i: IBPSA Asia Conference : The 3rd Asia Conference of International Building Performance Simulation Association - The 3rd Asia Conference of International Building Performance Simulation Association.
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Konferensbidrag (refereegranskat)abstract
- A third of Sweden’s two million single-family houses were built in the period 1961-1980, and many of them are in need of renovation. Energy use in these houses is high, and they are fairly homogeneous in technical terms. A previous study of four reference houses showed that final energy use could be reduced in theory by approximately 65-75 % after renovation, by implementing conventional passive house components renovation measures. This paper evaluates the results and uncertainties arising from the previous study by performing a local sensitivity analysis of the most important input parameters, such as number of inhabitants, climate zone, orientation of the houses and alternative renovation measures in a Swedish context. The results presented in this paper show that the previously estimated final energy use reduction can be increased even further, to 75-80 %, by introducing additional renovation measures. The climate zone was shown to have the largest impact, with twice as much space heating required in the coldest evaluated climate compared to the mildest. The impact from inhabitants was less than expected, due to a counterbalancing impact on the final energy use from internal gains and domestic hot water.
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| 8. |
- Gosztonyi, Susanne, et al.
(författare)
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Multi-active façade for refurbishments of residential buildings
- 2016
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Ingår i: Journal of Façade Design and Engineering. - 2213-3038. ; 4:3
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Tidskriftsartikel (refereegranskat)abstract
- This article reflects results from the technology screening and analyses of passive and active measures applied to large scale residential building refurbishments, focusing on the facade. This work is part of the research study ‘multi-active façade' that focuses on the development of an innovative facade concept suitable for the refurbishment challenges that the ambitious Swedish housing programme "Miljonprogrammet" of the 1960s to 1970s is facing now. The objective is to identify those measures for energy efficient facade refurbishments of a building concept that uses multifunctional solutions, while an upgrading towards a highly energy efficient standard is economically limited. Two criteria are in the centre of the investigations: “Multi-active” and “prefabrication” in the realm of cost-effectiveness and minimal-invasive refurbishment. Hereby, "passive" measures, such as adaptive thermal insulation or thermal puffer zones useable as extended living areas, are analysed in the context of their performance effectiveness in cold climates. The potential of “active” measures, such as semi-decentralized ventilation or solar energy technologies, is analysed in regards to utilize existing infrastructure, decentralized functionality and local sources at its optimum. All measures shall provide a high comfort and performance out of the façade. The facade is also meant to be a “plug and play” system allowing fast mounting and high archi-tectural flexibility. Framing criteria are sustainability and - critical for the success of refurbishments – economic replicability. The benefits of such energy renovation, often not considered in the decision making process, shall become visible by life cycle assessments and performance analyses. The analyses in this article contributes to the ongoing process in these goals, drawing conclusions for the replicability of selected active and passive solutions.
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| 9. |
- Liuke, Laura, et al.
(författare)
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Every-day Life and Energy Use - Self-reported Household Energy Behaviour in Malmö, Sweden
- 2017
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Konferensbidrag (refereegranskat)abstract
- Development in building envelopes and energy efficient systems has an impact in reducing energy use, but the everyday life of the households significantly influences the total performance of the housing sector that in Sweden constitutes 25% of the total energy use. This paper presents and discusses some results of a study investigating the relationship between every-day life and energy use among the socio-culturally diverse tenant population in Malmö. The method consists of interviews and questionnaires conducted within a group of respondents learning Swedish. The energy behaviour is assessed based on the interview and questionnaire responses and the household energy use is quantified based on this assessed behaviour and available values of the energy efficiency of appliances focusing on electricity use. The results show a variation in energy use among the respondents that principally seems to be derived from the current life-style while being primarily influenced by individual preferences.
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| 10. |
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