Effects of wind field characteristics on pitch bearing reliability: a case study of 5 MW reference wind turbine at onshore and offshore sites; Auswirkungen von Windfeldeigenschaften auf die Zuverlässigkeit von Rotorblattlagern: eine Fallstudie über eine 5-MW-Referenz-Windkraftanlage an Onshore- und Offshore-Standorten

Rezaei, Ashkan; Guo, Yi; Keller, Jonathan; Nejad, Amir R.

doi:10.1007/s10010-023-00654-x

Title: Effects of wind field characteristics on pitch bearing reliability: a case study of 5 MW reference wind turbine at onshore and offshore sites; Auswirkungen von Windfeldeigenschaften auf die Zuverlässigkeit von Rotorblattlagern: eine Fallstudie über eine 5-MW-Referenz-Windkraftanlage an Onshore- und Offshore-Standorten

Journal Article · Mon Mar 20 00:00:00 EDT 2023 · Forschung im Ingenieurwesen

DOI:https://doi.org/10.1007/s10010-023-00654-x· OSTI ID:1968237

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Norwegian University of Science and Technology, Trondheim (Norway)
National Renewable Energy Laboratory (NREL), Golden, CO (United States); Technical University of Denmark, Roskilde (Denmark)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)

This paper presents a study on pitch bearing basic rating life affected by wind field characteristics at both onshore and offshore wind sites. The National Renewable Energy Laboratory 5 MW reference wind turbine is selected for the study. Wind field characteristics including reference hub height mean wind speed, wind speed distribution, wind shear, and vertical inflow are studied. A decoupled approach is employed where global analysis is performed first. Second, the load effects from the global analysis are applied on a reference pitch bearing designed based on best industrial practices. For the case study onshore site, it is found that the Kernel density estimation best fits the wind distribution, while the International Electrotechnical Commission proposed distribution appears to be not suitable. Moreover, it is shown that the seed number has high effect on the bearing life in turbulence wind and the wind speeds around rated have the highest contribution in both bearing fatigue damage and extreme load failure. The results contribute to better understanding of the wind field characteristics on the pitch bearing life.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office; Research Council of Norway

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1968237

Report Number(s):: NREL/JA-5000-84795; MainId:85568; UUID:492849e1-d425-4f42-84b3-7b8a04ba0658; MainAdminID:68644

Journal Information:: Forschung im Ingenieurwesen, Vol. 87, Issue 1; ISSN 0015-7899

Publisher:: Springer NatureCopyright Statement

Country of Publication:: United States

Language:: English

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