Carbon Footprint Analysis of Buildings Based on LCA Theory Under Carbon Neutrality Goals: Taking the 3rd China International Solar Decathlon Competition as an Example

Abstract

This paper focuses on the design of residential buildings oriented to the efficient use of solar energy, and selects the entries HUI HOUSE of Hefei University of Technology and Lille I University of France in the 3rd China International Solar Decathlon China Competition, based on the theory of the life cycle assessment (LCA) of buildings, and analyzes the carbon footprint from four aspects: building materials production and transportation stage, building construction stage, building operation stage, and building demolition stage. Through the calculation of the carbon footprint of buildings, the socio-economic benefits of HUI HOUSE in carbon reduction were analyzed; the result of the calculation was that HUI HOUSE achieved carbon neutrality in the ninth year, and continued carbon reduction after that, contributing a cumulative total of 947.54 tons of carbon negative in the life cycle of buildings.