Assessment of Building Greenhouse Gas Emissions Based on Hybrid Life-cycle Model

This paper constructs the building's hybrid life cycle model based on the traditional LCA model and EIO model, and uses it to measure and calculate GHG (Greenhouse Gas) emissions from buildings. This model divides the building life cycle into three stages, including materialization, utilization and dismantling. EIO model is used to calculate GHG indirect emissions, and LCA model is used to calculate GHG direct emissions. This method can be applied to effectively make use of the existing project cost data for calculation, thus overcoming the disadvantage of much workload arising from the traditional method. According to the calculation of one residential housing and comparison with the calculation result of LCA model, GHG emissions of this house are most serious in the stage of utilization; and in materialization stage, GHG emissions rely on the control over the emissions of upstream sectors and improvement of utilization efficiency of the applied materials. This model is able to provide new theoretical reference for the building GHG emissions.