Carbon Emission Calculation And Carbon Benefit Assessment For Electric Vehicle Life Cycle

The situation of carbon emission reduction at home and abroad is becoming increasingly serious.In recent years,China has promoted the 3060 Plan from all aspects,striving to achieve carbon peak in 2030 and carbon neutrality in 2060.Electric vehicles mainly consume pollution-free electric energy during the operation phase,so it is believed that the vigorous development of electric vehicles is conducive to carbon reduction and is the future development direction of the automotive industry.However,in the context of China’s power structure dominated by thermal power,from the perspective of the entire lifecycle of electric vehicles,there is some controversy over whether electric vehicles can achieve greenhouse gas reduction compared to traditional fuel vehicles.Therefore,it is necessary to conduct a reasonable and accurate assessment of the emission reduction effect of electric vehicles through life cycle assessment.This article first takes pure electric vehicles and plug-in hybrid electric vehicles as research objects,and compares them with traditional fuel vehicles.Adopting a life cycle assessment method for the three types of vehicle models mentioned above,by determining their target boundaries,energy input inventory,and establishing a quantitative carbon emission output model,the carbon emissions of their raw materials and production stages,usage stages,and recycling and treatment stages are calculated.Then,delineate the system boundaries for the lifecycle costs of the three vehicle models,and obtain quantitative results through the analysis of the lifecycle cost model.Finally,based on value engineering,a carbon efficiency evaluation model is established,and a function structure method is used to establish a function mapping expression for two types of electric vehicles and traditional fuel vehicles.A function structure decomposition model is established,and functional quantitative analysis is achieved based on AHP fuzzy comprehensive evaluation.Combined with examples,carbon efficiency evaluation for two types of electric vehicles and traditional fuel vehicles is achieved.Research has shown that pure electric vehicles have the highest greenhouse gas emissions during the raw material and production stages,as well as the recycling and treatment stages,followed by plug-in hybrid electric vehicles,and traditional fuel vehicles have the lowest carbon emissions.However,during the usage phase,there is a clear opposite trend,with greenhouse gas emissions ranging from high to low from traditional fuel vehicles,plug-in hybrid electric vehicles,and pure electric vehicles.In terms of carbon efficiency evaluation,the two electric vehicles selected in this article have higher carbon efficiency compared to traditional fuel vehicles,with significant energy-saving and emission reduction effects.Compared with plug-in hybrid electric vehicles,pure electric vehicles have higher carbon efficiency and more obvious energy-saving and emission reduction effects.