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• W2192883537 abstract "The buildings produced during the million housing program 1964-1975 in Sweden are facing a direrenovation need. A method of both lowering energy consumption and letting tenants stay during theprocess is adding a building integrated greenhouse to the facade. This produces a warmer microclimate and reduces the temperature difference between the inside and outside of the building exteriorwall. The greenhouse can also be used for social interaction. By the use of phase change materials asthermal energy storage the large temperature intervals in the greenhouse could be mitigated.The greenhouse building addition was investigated as an alternate refurbishment strategy of Brogardenbuildings in Alingsas. These houses have gone through extensive refurbishment and have reachedpassive house standard. The project has been thoroughly documented which is why it was found to bea suitable object to study. The greenhouse building addition was compared to one of the buildingsbefore and after renovation as reference cases. The greenhouse suggestion was analyzed within thethree spheres of sustainability- ecology, economy and society - in relation to the reference cases.The ecologic sphere was assessed by measuring the energy flow over the wall with the greenhouse. Toachieve this, all cases were modelled in COMSOL Multiphysics® where influencing physicsphenomena were implemented and the use of PCM analyzed.The economic sphere was assessed by calculating the payback period for the retrofit investments.For the assessment of the social sphere it was chosen to create a new assessment tool, specifically forrefurbishment of multi-residential housing buildings that would enable a quick but holistic assessment.Relevant indicators from several building certification systems were collated into a new tool aimed atinvestigating social sustainability in only the physical building. The certification systems wereBREEAM, DGNB, LEED and Miljobyggnad. The tool was brought to a meeting between expertsassessing the social sustainability for the two alternating refurbishment strategies.It was found that the greenhouse suggestion is not a sufficient stand-alone renovation in the scenarioinvestigated but could prove to be a reasonable investment for a building with a higher initialperformance, or as a part of a renovation package. The greenhouse has an apparent effect on reducingthe energy flows of the exterior wall but the addition of PCMs as heat storage has less effect thanassumed. The building alterations are polarized and challenging to compare in the social and economicspheres. The social sustainability assessment tool was found to rather assess the preconditions forsocial sustainability rather than the actual social sustainability.Suggestions for further investigation for the ecological analysis are to extend the system boundaries toinclude a whole building or introduce an active heat transport system. Furthermore improvements inthe economic sphere could be to investigate the effects of enveloping the entire building or all facadesin a greenhouse structure. To go further with the social sustainability assessment tool it is necessary toinclude the process and the neighborhood scale in the assessment. It is also important to furtherinvestigate how the indicators should be weighted to value them correctly." @default.
• W2192883537 created "2016-06-24" @default.
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• W2192883537 date "2015-01-01" @default.
• W2192883537 modified "2023-09-27" @default.
• W2192883537 title "Renovating with a greenhouse and Phase Change Material - Assessing sustainability implications for million housing renovation" @default.
• W2192883537 hasPublicationYear "2015" @default.
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