A Meta-analysis-based Study On Lifecycle Energy Saving And Emission Reduction Characteristics Of Electric Vehicles And CCHP Systems

Energy is the key to promote the development of national productivity.The growing demand and consumption of traditional fossil energy have led to serious energy crisis and environmental pollution.In recent years,in order to cope with the energy crisis,solve the serious pollution,many countries have actively promoted new technologies.As the representatation of energy saving and emission reduction,the combined cooling,heating and power(CCHP)system and electric vehicles(EVs)have been widely attention and recognized.However,the existing research results show that the performance of the EVs and CCHP system in the whole life cycle condition needs to be further verified.Due to the single research content,lack of quantitative calculation and general applicability,the research results are greatly different and lack of uniformity and practicability.Therefore,it is necessary to abandon the differences in research results and make a comprehensive,systematic and comprehensive analysis of EVs and CCHP system,and give an objective and true evaluation of their energy consumption and emissions.This paper based the life cycle assessment method to conduct a meta-analysis to evaluate the energy consumption,greenhouse gas emissions and environmental impact of EVs and CCHP system.First of all,the necessity of energy structure adjustment and the development prospect of green energy are fully analyzed through literature review and relevant data collection of National Bureau of Statistics and International Energy Organization.Secondly,EVs and CCHP system were selected as the research objects,and literature related to energy consumption,greenhouse gas emissions and environmental impacts of the two systems under life cycle conditions was collected and selected to establish a literature database.Thirdly,the existing literatures were screened according to the designed inclusion and exclusion criteria,and the system boundaries and data lists of EVs and CCHP system were summarized during the screening process.Then,data were extracted from the included literatures and analyzed by R software.Finally,according to the results of the Meta analysis.the comprehensive evaluation of the EVs and CCHP system in the whole life cycle was obtained,and the comparative results of each stage,region and technology type were obtained according to the subgroup analysis.It provides constructive suggestions and decision support for the healthy development of EVs and CCHP system in the future.