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Frischknecht, R. ; Ramseier, L.; Yang, W.; Birgisdottir, H.; Chae, Ch U; Lützkendorf, T.; Passer, A.; Balouktsi, M.; Berg, B.; Bragança, L.; Butler, J.; Cellura, M.; Dixit, M.; Dowdell, D.; Francart, N.; García Martínez, A.; Gomes, V.; Gomes da Silva, M.;

REVISTA: IOP Conf. Series: Earth and Environmental Science 588 (2020) 022008
IMPACTO: JCR (2019): 0.18. Environmental Science (miscellaneous), not yet assigned quartile
DOI: 10.1088/1755-1315/588/2/022029

ABSTRACT:

Introduction: The international research project IEA EBC Annex 72 investigates the life cycle related environmental impacts caused by buildings. The project aims inter alia to harmonise LCA approaches on buildings. Methods: To identify major commonalities and discrepancies among national LCA approaches, reference buildings were defined to present and compare the national approaches. A residential high-rise building located in Tianjin, China, was selected as one of the reference buildings. The building has an energy reference area of 4566 m2 and an operational heating energy demand of 250 MJ/m2a. An expert team provided information on the quantities of building materials and elements required for the construction, established a BIM model and quantified the operational energy demand.
Results: The greenhouse gas emissions and environmental impacts of the building were quantified using 17 country-specific national assessment methods and LCA databases. Comparisons of the results are shown on the level of building elements as well as the complete life cycle of the building.
Conclusions: Despite the variability in the greenhouse gas emissions determined with the 17 national methods, the individual results are relevant in the respective national context of the method, data, tool and benchmark used. The results imply to include building technologies as their contribution to the overall environmental impacts is not negligible.

Highlights:
Comparison of diferent national methods to building LCA.
Main construction elements are reinforced concrete shear walls, beams and floor slabs.
Differences in backgound data, the scope of the assessment and the reference study period applied.
Environmental benchmarks correspond to the particular LCA approach and database of a country that is applied.