Elevator Carbon Emission Assessment Based On The Life Cycle

Global warming has become an undeniable fact,among which carbon dioxide is the main cause of global climate change.As one of the high-energy-consuming special equipment,elevators consume a lot of resources and energy in the process of manufacture or operation,and are accompanied by a large amount of carbon emissions.Therefore,it is of great significance to study the energy saving and carbon reduction of elevators.At present,the research on carbon emissions of elevators at home and abroad mainly focuses on the analysis of energy consumption during use,and there is a lack of evaluation of carbon emissions in the entire life cycle of elevators.For this reason,this research studies the carbon emissions of elevators in different life stages based on the theoretical analysis of the whole life cycle.The specific research contents are as follows:(1)This study adopts the Life Cycle Assessment(LCA)theory,which defines the life cycle of the elevator as the manufacturing stage,the product installation stage,the operation and use stage,and the dismantling and scrapping stage.According to the characteristics of each stage of elevator equipment,the source of carbon emissions in the whole life cycle is analyzed.According to the characteristics of each stage of elevator equipment,the source of carbon emissions in the whole life cycle is analyzed.The carbon emission factor is determined by consulting relevant literature and relevant databases,and the emission coefficient method is used to combine the inventory data with the carbon emission factor to establish a carbon emission calculation model for the entire life cycle of the elevator.Considering that different elevators have different scales and forms,this study uses functional units to compare similar data between different products on the same basis when evaluating the entire life cycle of elevator equipment.(2)Based on the above theoretical analysis,taking the traction elevators manufactured by the world’s top ten T elevator companies as research examples,conduct field research on the carbon emission sources and horizontal activity data of the four life stages of elevators,and apply the carbon emission calculation model Calculate the total carbon emissions and the carbon emissions per ton-km.In the use stage,an experimental test is carried out on whether or not to install the energy-saving feedback elevator.One-at-a-Time(OAT)method and Extended Fourier Amplitude Sensitivity Test(EFAST)method were used to analyze the sensitivity of carbon emission assessment results.At the same time,the reliability of each input parameter to the carbon emission result of the life cycle is judged according to the uncertainty analysis.(3)According to the carbon emission assessment results and sensitivity analysis results,reasonable and effective emission reduction strategies are proposed for the four life stages of the elevator,and the emission reduction potential analysis of the emission reduction strategies is carried out.The carbon emission assessment model established by this research is suitable for the quantitative measurement of carbon emissions in the whole life cycle of other elevators,and can provide a basis for the carbon emission assessment of elevators with different elevator specifications and different service years.The results of the study found that in the entire life cycle,the carbon emissions in the four life stages of elevator manufacturing,product installation,operational use,and dismantling and scrapping accounted for 41.31%,0.92%,57.32%,and 0.44%,respectively.Among them,the carbon emissions generated in the operation and use stage accounted for the largest proportion,and the use stage accounted for most of the carbon emissions in this stage,accounting for about 98.94%;followed by the production and manufacturing stage,of which the raw material acquisition stage accounted for the highest proportion of 98.60%.