Research on calculation and influencing factors of carbon emission during the materialization phase of prefabricated buildings
To further analyze carbon emission and its key influencing factors during the materialization phase of prefabricated buildings,this study firstly determined the system boundary of this phase,and then by using the carbon emission coefficient method,established a carbon emission calculation model for this phase.On the basis of quantified data,a structural equation model was used to analyze the carbon emission factors in this phase in an in-depth manner from the perspective of engineering management.Fourteen relationship hypotheses were proposed in six aspects:project overview,building materials consumption,transportation and storage,energy consumption,construction organization and management,and carbon emissions in the materialization phase of projects,purposed to fit and evaluate the influencing factors.Through case analyses,it is concluded that the carbon emissions in the production stage of construction materials are the highest in the whole materialization process according to the carbon emission calculation model for prefabricated building stages,accounting for 92.01％of the total emissions,followed by those in the construction stage(5.6％),building materials'transportation stage(1.46％),component transportation stage(0.63％),and component production stage(0.3％).As found in the structural equation analysis,the consumption of building materials delivers the strongest direct impact on carbon emissions in the materialization phase of projects;among the observation variables of building materials'consumption,the material selection gives the largest influence coefficient,i.e.0.93,followed by the utilization rate of low-carbon materials(0.88)and the recycling and utilization of materials(0.83).The comprehensive impact of the project overview,construction organization,and management on carbon emissions in the materialization phase of projects are ranked in the top two,followed by building materials'consumption,transportation and storage,and energy consumption.Reduction of carbon emissions should be started from the initial stage of projects,with a focus on control over the production stage of building materials;meanwhile,it is necessary to optimize the scheme design and adopt new processes,new technologies,and other measures,so as to reduce carbon emissions.The results of this study provide some theoretical references for the formulation of low-carbon strategies.
environmental engineeringprefabricated buildingsmaterialization phasecarbon emissioncarbon emission coefficient methodstructural equation model
万方数据
维普
