Low-carbon technologies and carbon reduction assessment of typical office buildings in hot summer and warm winter zone

Reducing the CO2 emissions in the building operation stage is crucial for the construction industry and even the whole society to achieve the goal of carbon peak and carbon neutralization. This paper focuses on office buildings in hot summer and warm winter zone, and studies the applicability of low-carbon technologies in different volume office buildings and the level of CO2 emission reduction. The results of energy consumption simulation and carbon emission calculation indicate that the CO2 emission reduction potential of active technologies is higher than that of passive technologies in hot summer and warm winter zone. Especially, the increase in air conditioning energy efficiency leads to a significantly higher CO2 emission reduction rate among all the building volumes discussed. Meanwhile, the CO2 emission reduction rates of efficient lighting and efficient lift will ascend and descend with the increase of building volume, respectively. The indirect CO2 emission from the purchased non-green power of smaller volume buildings can be dramatically reduced by installing photovoltaic panels on the roof.