Analysis of wind turbine Gearbox's environmental impact considering its reliability
Analysis of wind turbine Gearbox's environmental impact considering its reliability
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考虑可靠性的风电机组齿轮箱环境影响分析
DOI：
10.1016/j.jclepro.2018.01.078
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发表时间：
2018-04
影响因子：
11.1
通讯作者：
Shen G.
中科院分区：
文献类型：
--
作者：
Jiang L.;Xiang D.;Tan Y. F.;Nie Y. H.;Cao H. J.;Wei Y. Z.;Zeng D.;Shen Y. H.;Shen G.
风力涡轮机将风能转化为电能，在制造或运输过程中对环境产生负面影响。齿轮箱是涡轮机的重要部件之一，其可靠性是工业界十分关注的问题。因此，本研究进行生命周期评估（LCA），以评估环境影响的风力涡轮机齿轮箱考虑其可靠性，与“摇篮到坟墓”的方法。为了量化风电涡轮机齿轮箱可靠性对环境影响的影响，提供更加真实准确的结果，将可靠性分析融入到LCA模型中。齿轮箱的可靠性不仅决定了齿轮箱达到其设计寿命所需的数量，而且还决定了下一个齿轮箱中可以重复使用的部件数量，这两者都影响环境性能。首先介绍了这两个参数的计算方法，然后将这两个参数应用到生命周期评价模型中。然后，一个2兆瓦的风力涡轮机齿轮箱与两个回收方案作为案例研究。结果表明，变速箱的生命周期评价受制造过程的影响，零部件的重用可以减少10%左右的影响。可靠性敏感性分析表明，当齿轮箱的可靠性从78.25%降低到40.03%时，环境影响增加了25.25%。因此，在评价其环境影响时，考虑可靠性信息，可使评价结果更加准确、真实。
Wind turbines transform wind energy into electricity and it has a negative environmental impact during manufacturing or transportation. Gearbox is one of the most important components of wind turbine and its reliability is of great concern in industry. So this study performed a Life Cycle Assessment (LCA) to evaluate the environmental impact of wind turbine gearbox considering its reliability, with a “cradle-to-grave” approach. To quantify the influence of wind turbine gearbox's reliability on its environmental impact and provide a more realistic and accurate result, reliability analysis was integrated into LCA model. The reliability of gearbox determines not only the required amount of gearbox to achieve its design life but also the number of components which can be reused in next gearbox, both of which affect the environmental performance. First, the method to calculate these two parameters was described, afterwards, these two parameters would be used in the LCA model. Then, a 2 MW wind turbine gearbox with two recycling scenarios was used as the case study. The results show that the life cycle assessment of the gearbox is dominated by the manufacture process, and the reuse of components can reduce the impact around 10%. The reliability sensitivity analysis indicates that the environmental impact increases 25.25% as gearbox's reliability is reduced from 78.25% to 40.03%. Therefore, by taking reliability information into consideration when evaluating its environmental impact, a more accurate and realistic assessment result can be achieved.
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