Starting from the whole life cycle of buildings,the influence of building energy efficiency and different construction techniques on building carbon emissions are investigated.To explore and analyze the carbon emissions of buildings and the carbon reduction per unit area relative to cast-in-place concrete structures,based on the BIMBase platform and in accordance with GB55015-2021"General Code for Energy Efficiency and Renewable Energy Application in Buildings",a prefabricated residential project in Shanghai was selected for analysis.The results show that:1)The annual carbon emission index of the whole life cycle reaches 35.73 kgCO2 e/m2,accounting for 32.95％in building materials production stage,63.64％in building operation stage;The annual carbon emission index of the air conditioning system reaches 9.21 kgCO2/(m2·a),with cooling carbon emissions accounting for 61.35％;Recycling of building materials can achieve 8.93％carbon reduction strength;2)The carbon emission intensity during the operation phase is reduced by 10.17 kgCO2 e/m2 compared to the energy-saving standards for residential construction implemented in 2016,with a reduction rate of 46.03％;3)This project adopts a PC structure with a prefabrication rate of30％,and the carbon emissions during the construction phase are reduced by 6.5％compared to cast-in-place concrete structures.
carbon emissionBIMBasewhole life cycle of buildingsprefabricated building
NETL
NSTL
万方数据
