退役风机叶片循环路径与碳效益重构研究OA

Driven by the"dual carbon"strategic goals,China's wind power installed capacity has been growing rapidly,bringing the challenge of low-carbon recycling and utilization of decommissioned wind turbine blades to the forefront.This study aimed to systematically review the material recycling pathways,policy support systems,and life cycle carbon benefits of decommissioned wind turbine blades.The study first analyzed the regional distribution and unit characteristics of China's wind power installations,pointing out that decommissioned blades in different regions face differentiated challenges in dismantling,transportation,and reuse.Subsequently,it compared various recycling technologies including mechanical physical methods,pyrolysis,chemical methods,and combined methods.The results indicated that mechanical physical methods were low-cost but yields insufficient fiber retention rates(10%～78%).While pyrolysis had been industrialized,it was associated with relatively high carbon emission intensity.In contrast,chemical methods had higher fiber retention rates(55%～96%)and possed potential carbon reduction advantages.Combined methods capable of overcoming the limitations of single technologies,achieved fiber retention rates exceeding 95%,demonstrating significant potential for both high value and low carbon.At the policy level,China has established a"two-stage goal"of initially establishing a blade recycling responsibility mechanism by 2025 and forming industrial clusters by 2030,alongside a gradual improvement of standards and incentive mechanisms.Life cycle assessment revealed that wind power had a slightly higher global warming potential(GWP)than photovoltaic power.However,its emissions were mainly concentrated in the component manufacturing stage.With efficient recycling,wind power wes expected to surpass photovoltaic power in life cycle carbon benefits.In conclusion,promoting efficient recycling of decommissioned blades and coordinated policy actions can yield dual benefits in resource recycling and carbon reduction,thereby bolstering the sustainable development paradigm for renewable energy.