Research on low-carbon evaluation of green buildings based on the whole life cycle theory

Cities are highly dense areas with significant energy consumption and waste generation. Therefore, developing buildings with low energy consumption and reduced pollutant emissions is an important approach for China to achieve its goals of carbon neutrality, peak carbon emissions, and sustainable development. In this context, the concept and practice of green buildings have emerged. This research is based on the whole life cycle assessment method of the whole life cycle theory, integrating relevant indicators for calculating carbon emissions in buildings. It conducts a multidimensional evaluation and analysis of the low-carbon level of green buildings. Quantitative analysis is carried out based on five stages and five dimensions of the entire construction process. A conceptual model for the low-carbon evaluation of green buildings is established, and grey relational analysis and analytic hierarchy process are employed to rank and evaluate projects. The study aims to identify the key factors in the low-carbon evaluation of green buildings and discusses the focus and suggestions for future low-carbon management throughout the whole life cycle of green buildings. Highlights Based on LCA theory and carbon-emission index to evaluation the green buildings. Quantitative analysis on the green buildings based on the five stages and dimensions. Four green building cases are evaluated and ranked by Ahp and grey correlation method.