Early Design Stage Building LCA using the LCAbyg tool: Comparing Cases for Early Stage and Detailed LCA Approaches

SUSTAINABLE BUILT ENVIRONMENT D-A-CH CONFERENCE 2019

生态环境科学

Kjaer Zimmermann, R.^1 ; Kanafani, K.^1 ; Nygaard Rasmussen, F.^1 ; Birgisdóttir, H.^1

Danish Building Research Institute, Aalborg University, A.C. Meyers Vaenge 15, Copenhagen

2450, Denmark^1

关键词: Building element;    Building inventory;    Design and optimization;    Early design stages;    Early designs;    Life Cycle Assessment (LCA);    Life cycle stages;    Material types;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/323/1/012118/pdf
DOI  :  10.1088/1755-1315/323/1/012118

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Life Cycle Assessment (LCA) is used and accepted as a method to assess environmental impacts and resource use of buildings. In practice, LCA is typically used in stages where the design of the building is already finalized. However, LCA-calculations from early design stages can be used actively in design and optimization of the building. One of the obstacles to early stage LCA is that extensive data input on precise material types and amounts is needed, which is limited in early design stages. The simplifications needed for a designer in an early design LCA is addressed in a research project, where an extensive library of predefined building components and installations were developed and integrated into the existing Danish LCAbyg tool. The library assists the user in establishing a full building inventory by simple inputs of geometry of the building and a selection from the library of building element layers. However, the simplified approach to LCA of a building at early design stages inevitably affects results compared with results of a calculation made at later design stages where more, specific data is available. This paper presents an evaluation of building cases, modelled with the same background database and life cycle stages, using the simplified early design LCA approach and a detailed LCA approach. The evaluation includes testing of how well the predefined components in the early design approach fit with the case buildings and comparisons of the total material input and precision of the final LCA results.