Discussion on paths of carbon peak and carbonneutrality of urban buildings in China

Calculates the hidden carbon emissions and operating carbon emissions of urban civil buildings in China. Points out that the main factors that affect the carbon peak of urban buildings in China are the scale and life of the buildings and the high carbon and high energy consumption of central heating in northern cities. If we follow the existing development mode (BAU), it is difficult for Chinese urban buildings to peak carbon emissions in 2030. Based on the measures of controlling the construction scale, heating system electrification and improving efficiency, and realizing the design of building energy consumption limit, the carbon peak of urban buildings in China will reach 2.1 billion tons by 2030, which is nearly 50% lower than that of BAU. Proposes five basic measures for carbon neutrality of urban buildings, namely, building ultra-low energy buildings for reducing carbon load, building electrification and improving energy efficiency, on-site renewable energy utilization, providing flexibility for high permeability variable renewable energy, and carbon capture and carbon utilization in air. Emphasizes that the way of urban development and construction must be from extensive extension to intensive connotation, and from incremental construction to stock quality improvement.