风电场生命周期CO_2排放核算与不确定性分析

Quantifying CO_2 emissions of one wind farm using life cycle assessment and uncertainty analysis

提出了风力发电技术生命周期能耗和CO2排放核算的详细方法.应用上海某风电场数据进行核算,结果认为,风机生产阶段能耗和CO2排放占风电场生命周期能耗和CO2排放的比例均为最大,分别为68.23%和67.18%.不确定性分析认为,在所有强度参数中,钢生产综合能耗最为灵敏.风电场能耗强度和CO2强度分别为3.24gce/(kW h)和9.47g/(kW h),明显低于300MW火力发电机组的相同指标,分别为330gce/(kW h)和915g/(kW h).20a服役期的50MW风电场满期后,同比300MW火电机组少排放CO2约234万t.

This paper brought forward a detailed method of quantifying life-cycle energy consumption and CO2 emissions of wind power technology.Using case data from a Shanghai wind farm,the results show that energy consumption and CO2 emissions from the stage of wind turbine production are the highest among all stages of the life cycle,and the shares are 68.23% and 67.18% respectively.Uncertainty analysis also implies that the comprehensive energy consumption of steel production is the most sensitive parameter to affect the final results.The life-cycle energy intensity and CO2 intensity of wind farm are respectively 3.24gce/（kW·h） and 9.47g/（kW·h）,which is obviously lower than the corresponding values [330gce/（kW·h） and 915g/（kW·h）] for a 300MW coal-fired generating unit.For a 50 MW wind farm which reaches its end of life（20 years）,it can altogether reduce 2.34 million tons of CO2 compared with a 300 MW coal-fired generating unit.