Life Cycle Assessment Of Wind Turbine Based On Green Supply Chain

China is the world's largest power producer with the largest growth rate.The proportion of wind energy in renewable energy is also rising year by year.The the rapid growth of the wind power industry has also become a hot research spot.Given the initial intention of the green development of wind power,the green development of wind energy should not ignore the environmental impact of wind energy,although wind energy is renewable.The green supply chain combines the concept of supply chain management with sustainable development,which considering the environmental impact and resource efficiency of the entire supply chain.The life cycle assessment method can identify the environmental impacts of each link from the perspective of life cycle.which is the most ideal theoretical guidance tool for green supply chain management.Therefore,based on the life cycle theory and the theoretical guidance of green supply chain management,this paper sets store by the status quo of China's wind power industry,with a focus on the clean production and green supply chain management of wind power generator enterprises.Furthermore,development strategies are proposed,in order to provide reference for the country to unveil tailored wind-power policies.This study reviews the development of wind power industry,and summarizes the domestic and international research related to wind Turbine life cycle.With 1.5 MW wind Turbine and 2.5 MW wind Turbine as the research subject,the wind power life cycle is divided into 4 foundation,cabin,foundation,nacelle,rotor and recycling stages.The SimaPro software is used to assess the environmental impact of wind Turbine life cycle.Additionally,the total environment-impact potential of different life cycle stages is obtained through normalization and weighting.Quantitative comparative analysis is also carried out herein regarding the environmental-impact type index of the life cycle production stage.It also calculates GHG emissions,Certification emission reduction?CER?,and cumulative total energy demand CED in its life cycle,providing theoretical support for the green supply-chain management of the wind power industry.Following are the conclusions.?1?Environment-impact-wise,excluding other factors,the environmental impact of 2.5 MW units is lower than that of 1.5 MW units in the entire wind Turbine production process.Among the 2.5 MW units,the wind Turbine with a hub height of 130m stands out.To be exact,the environmental impacts of wind Turbines in each life cycle are as follows:tower>foundation>nacelle>rotor.In the comprehensive environmental impact of wind Turbine life cycle,terrestrial ecotoxicity produces the greatest impacts,and photochemical ecotoxicity the second.The global warming makes up the smallest proportion of the total environmental impact,accounting for 0.08%of the total environment-impact index.Terrestrial ecotoxicity potential accounting for 43.36%-46.57%of the total environment-impact index.Terrestrial ecotoxicity potential accounting for 23.41%-24.61%.Also,the various environmental impacts of the same power wind Turbines drop as hub height rises.?2?Energy-demand-wise,as a whole,cumulative energy demand CED of 1.5 MW wind Turbine is 39.88-60.3 MJ/MW,and life-cycle cumulative energy demand CED of 2.5 MW wind Turbine is 57.89-64.34 MJ/MW.Energy input in the production process is a major part of the energy inputs throughout the life cycle.?3?The results of the calculation of greenhouse gas emissions show that each MWh of electricity generated by the wind-driven generator produces0.0110-0.0209 kg CO₂-Equiv/kWh,The traditional thermal power produced CO₂ emissions of 46.67-88.66times that of traditional fire power.Nuclear power produced carbon dioxide is 1-2 times that of wind power.new greenhouse gas and other atmospheric pollutant pollutants will not be produced.So,such generator has an outstanding advantage in terms of environmental benefits.?4?According to the results of sensitivity analysis,when the metal recovery rate reaches 70%,80%and 90%,the environmental effects could be mitigated to varying degrees.Meanwhile,the sensitivity of photochemical smog is the weakest among the 10environmental impact indices offered by CML.The sensitivity of global warming is the strongest.As the metal recovery rate reaches 90%,the global warming potential could be reduced by 80.56%.Obviously,the recovery and reuse of metal materials have a significant influence on the life cycle of wind Turbines.?5?Targeting green supply chain,this paper analyzes the green supply chain,based on the system boundary of the life cycle of wind Turbine.It firstly identifies the main resource consumption and environmental emission links in the supply chain.Among the first-class suppliers,the key management subject is tower suppliers.Looking back to the upstream secondary suppliers of wind-turbine manufacturers,we can find that the key green management objects are concrete manufacturing,steel production and epoxy resin suppliers.Therefore,the key to reduce the environmental impact of wind-power generation technology is to reduce the energy consumption of steel production and concrete production process.Building on the sensitivity analysis of the life cycle of the wind Turbine,we can find that the green supply chain management should be used to recycle the raw materials in the abandoned process.