The Swedish National Board of Housing, Buildings and Planning has proposed a law that requires new buildings to declare the amount of greenhouse gas emissions the building has generated during the building phase of the building’s lifecycle. The law is proposed to come into effect in January 2022. To be able to declare the amount of greenhouse emissions a building generates during the building phase of the building’s lifecycle, it needs to be calculated. This is supposed to be calculated during the design phase of the building process, therefore it is possible that designing consultants will be affected by the law. It is possible to calculate emission of greenhouse gases in an 3D environment by utilizing BIM-based LCA. Research about BIM-based LCA shows different perspectives regarding what level of development (LOD) the model need to obtain before the emissions of greenhouse gases can be calculated. The calculated greenhouse gases could be valuable for designing consultants to evaluate design alternatives in order to reduce greenhouse emissions in housing. The purpose of the study is to further explore the knowledge and possibilities of calculating greenhouse emissions in housing. The aim of the study was to answer the research questions, in order to fulfill the purpose. The research questions in the study were: · How does the calculated greenhouse emissions vary in architectural models with different level of development as base? · What pros and cons exist in conducting BIM-based LCA in three different stages of the design process? · How could calculated greenhouse emissions be used to affect the design process? The study was carried out by calculating emitted greenhouse gases for a building, and conducting a discussion in a focus group under the frame of a case study. A literature study was carried out as well to define key concepts and processes relevant to the study. The results show that the emitted greenhouse gases vary heavily throughout the design process. Furthermore, calculating emitted greenhouse gases early in the design process does not give an accurate indication of where the buildings final amount of emitted greenhouse gases will end up. However, there is a greater possibility to make changes to accommodate a design with less emitted greenhouse gases in early stages of the design process. In order to make changes in the early stages of the design process, premade templates of different building parts must be linked with both data regarding emitted greenhouse gases and costs.
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:ltu-85651 |
| Date | January 2021 |
| Creators | Sjödin, Christian |
| Publisher | Luleå tekniska universitet, Industriellt och hållbart byggande |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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