Research On Energy Return On Investment Of China's Wind Power Generation From The Life-cycle Perspective

As an important renewable energy source,wind power has developed rapidly in China in recent years.However,there is a lack of systematic and comprehensive analysis of the energy efficiency of wind power generation and its environmental externalities.Taking the HuaRun Quanyong Wind Farm in Fogang,Qingyuan in Guangdong province as an example,this paper uses the Energy Input Return Method(EROI)to calculate the net energy efficiency of China's wind power generation and the impact on energy efficiency of its external environmental costs.The main conclusions of this paper are as follows:First,considering the life cycle energy input,the EROI is 11.6,meaning that wind power has relatively high energy efficiency;Secondly,the EROI considering the life cycle energy input and environment input is 10.9,which decreases by 6.1%.Third,the life cycle power generation of a single wind turbine in the wind farm is between 77.3 GWh and 108 GWh.Fourth,the life cycle energy input for wind power generation is 738,670 GJ,of which the energy input in the wind turbine production stage is the most,about 354,554 GJ.Fifth,the environmental inputs required from the wind turbine production stage to the final waste recycling stage are 27,627 GJ,1.7 GJ,16,603 GJ,1,606 GJ,and 4,143 GJ.Sixth,controlling air pollution needs the most proportion of total environmental input,about 43.1%,followed by solid waste pollution(35.4%),water pollution(17.8%),and noise pollution(3.7%).The policy recommendations of this paper are as follows:first,wind power development should pay attention to its energy efficiency,and economic evaluation and energy evaluation should be carried out simultaneously;second,encourage the development of wind power industry and accelerate the development and utilization of wind energy resources;third,emphasize the optimal location of wind turbine and reduce power loss during operation;fourth,strengthen the treatment of major pollutants and vigorously develop nvironmentally-friendly and energy-saving technologies;fifth,formulate reasonable support policies and improve the supporting development system.