Research On Energy Intensity And Energy Saving Strategy Of Manufacturing Industry From The Perspective Of Technical Efficiency

In recent years,climate warming has led to frequent natural disasters,which has become the primary threat to the global economy and humanity.Relevant research reports show that excessive carbon dioxide emissions are the primary cause of global warming,and fossil energy combustion is the main source of carbon emissions.As a major energy consumer,the decoupling of manufacturing production and energy use is crucial to mitigate global warming.Because of the critical role of production technology in manufacturing operations and energy use patterns,it is of great significance to evaluate the impact of technology on energy use in manufacturing for the design of reasonable and effective manufacturing decoupling measures.Based on the production theory,Shephard distance function,data envelopment analysis,LMDI index decomposition analysis and generalized Fisher index analysis,this paper constructs a two-stage production-theoretical decomposition analysis model.The model can examine energy use from the perspective of production system,and consider the impact of sector heterogeneity and production factor substitution.Specifically,in the first stage,the Shephard output distance function is introduced into the traditional index decomposition equation to reveal the mechanism of energy intensity change.In the second stage,the substitution effect and technical effect of production factors are further quantified by means of generalized Fisher index method and Malmquist index decomposition method,and the influence of changes in input-output relationship and technological progress on energy intensity is analyzed.Finally,the change of manufacturing energy intensity is decomposed into seven factors.Applying this model,two application studies are carried out in this paper.Firstly,this paper empirically studies the determinants of manufacturing energy intensity changes in 41 major economies from 2005 to 2014.The results show that the decline of total intensity during this period mainly comes from developed economies.Capital energy substitution and technological progress have played an important role in the improvement of intensity,while the decline of technical efficiency in production and energy utilization is the main obstacle.Secondly,this paper empirically studies the determinants of manufacturing energy intensity change in China’s26 provinces(urban areas)from 2005 to 2015.The results showed that the total intensity decreased rapidly during the study period,which was mainly attributed to the eastern region.Capital energy substitution and technological progress are the main driving forces for the decline of energy intensity,while labor energy substitution is the main obstacle.In addition,this paper analyzes the change patterns of global and Chinese manufacturing energy intensity and its determinants from the perspectives of time,region and sector.On the basis of empirical research,combined with the actual situation of global and Chinese manufacturing industry,this paper puts forward some reasonable and targeted suggestions for formulating energy conservation and emission reduction policies from different dimensions.