A numerical method to transfer an onshore wind turbine FMEA to offshore operational conditions

2015 ◽  
pp. 961-966
Author(s):  
Xi Yu ◽  
D Infield ◽  
S Barbouchi ◽  
R Seraoui
Keyword(s):  
Wind Turbine ◽  
Numerical Method ◽  
Onshore Wind ◽  
Operational Conditions

Analysis of vibration monitoring data of an onshore wind turbine under different operational conditions

2020 ◽  
Vol 205 ◽  
pp. 110071 ◽  
Author(s):  
Yan Zhao ◽  
Jianing Pan ◽  
Zhuye Huang ◽  
Yachao Miao ◽  
Jianqun Jiang ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Vibration Monitoring ◽  
Monitoring Data ◽  
Onshore Wind ◽  
Operational Conditions

scholarly journals Deterioration of cracks in onshore wind turbine foundations

2018 ◽  
Vol 167 ◽  
pp. 121-131 ◽  
Author(s):  
Jack McAlorum ◽  
Marcus Perry ◽  
Grzegorz Fusiek ◽  
Pawel Niewczas ◽  
Iain McKeeman ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Onshore Wind

Overview of Wind Turbine Field Failure Databases: A Discussion of the Requirements for an Analysis

2018 ◽  
Author(s):  
Roozbeh Bakhshi ◽  
Peter Sandborn
Keyword(s):  
Statistical Analysis ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Wind Farms ◽  
Onshore Wind ◽  
Failure Times ◽  
Reliability Parameters ◽  
Failure Data ◽  
Offshore Installations ◽  
Field Failure

With renewable energy and wind energy in particular becoming mainstream means of energy production, the reliability aspect of wind turbines and their sub-assemblies has become a topic of interest for owners and manufacturers of wind turbines. Operation and Maintenance (O&M) costs account for more than 25% of total costs of onshore wind projects and these costs are even higher for offshore installations. Effective management of O&M costs depends on accurate failure prediction for turbine sub-assemblies. There are numerous models that predict failure times and O&M costs of wind farms. All these models have inputs in the form of reliability parameters. These parameters are usually generated by researchers using field failure data. There are several databases that report the failure data of operating wind turbines and researches use these failure data to generate the reliability parameters through various methods of statistical analysis. However, in order to perform the statistical analysis or use the results of the analysis, one must understand the underlying assumptions of the database along with information about the wind turbine population in the database such as their power rating, age, etc. In this work, we analyze the relevant assumptions and discuss what information is required from a database in order to improve the statistical analysis on wind turbines’ failure data.

Integrated numerical method for the prediction of wind turbine noise and the long range propagation

2010 ◽  
Vol 10 (2) ◽  
pp. S316-S319 ◽  
Author(s):  
Eunkuk Son ◽  
Hyunjung Kim ◽  
Hogeon Kim ◽  
Wooyoung Choi ◽  
Soogab Lee
Keyword(s):  
Wind Turbine ◽  
Numerical Method ◽  
Long Range ◽  
Wind Turbine Noise

Steel hybrid onshore wind towers installed with minimal effort: Development of lifting process

2018 ◽  
Vol 42 (4) ◽  
pp. 335-352 ◽  
Author(s):  
Mohammad Reza Shah Mohammadi ◽  
Carl Richter ◽  
Daniel Pak ◽  
Carlos Rebelo ◽  
Markus Feldmann
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Lattice Structure ◽  
Cost Component ◽  
Onshore Wind ◽  
Supporting Structure ◽  
Element Simulation ◽  
Connection Component ◽  
Minimal Effort ◽  
Relevant Cost

The total costs per produced kilowatt-hour for wind turbines depend significantly on the investment costs. Thereby, the tower is a relevant cost component, which depends on the chosen supporting structure, the material, and especially on the erection process. Here, an innovative erection process is presented in order to minimize the wind turbine installation, which leads to excluding the extra tall cranes for installing the wind turbines with hub heights over 180 m. In order to propose the innovative erection process, a new hybrid lattice/tubular supporting structure for the onshore wind turbines is designed. The connection component between the tubular part and lattice structure is proposed considering the support functionality for the new erection process. Furthermore, the building steps of the complete erection process are explained. The operational and the lifting loads on wind turbine supporting structure are estimated, and consequently, the erection process stages were analyzed. Finally, the finite element simulation are performed to specify the critical stresses in subcomponents of the supporting structure in each lifting stage and to show the feasibility of the erection process. Moreover, the most critical points and the stages are investigated and stress level in the supporting structure components is computed.

scholarly journals A New Conceptual Design and Dynamic Analysis of a Spar-Type Offshore Wind Turbine Combined with a Moonpool

Energies ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3737 ◽  
Author(s):  
Thanh Dam Pham ◽  
Hyunkyoung Shin
Keyword(s):  
Wind Turbine ◽  
Bending Moment ◽  
Time Domain Analysis ◽  
Domain Analysis ◽  
Frequency Domain Analysis ◽  
Dynamic Responses ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Operational Conditions ◽  
Floating Offshore Wind Turbines

Floating offshore wind turbines promise to provide an abundant source of energy. Currently, much attention is being paid to the efficient performance and the economics of floating wind systems. This paper aims to develop a spar-type platform to support a 5-MW reference wind turbine at a water depth of 150 m. The spar-type platform includes a moonpool at the center. The design optimization process is composed of three steps; the first step uses a spreadsheet to calculate the platform dimensions; the second step is a frequency domain analysis of the responses in wave conditions; and the final step is a fully coupled simulation time domain analysis to obtain the dynamic responses in combined wind, wave, and current conditions. By having a water column inside the open moonpool, the system’s dynamic responses to horizontal and rotating motions are significantly reduced. Reduction of these motions leads to a reduction in the nacelle acceleration and tower base bending moment. On the basic of optimization processes, a spar-type platform combined with a moonpool is suggested, which has good performance in both operational conditions and extreme conditions.

Prediction of Ice Accretion on Wind Turbine with Numerical Method

2012 ◽  
Vol 512-515 ◽  
pp. 754-757
Author(s):  
Xian Yi ◽  
Kai Chun Wang ◽  
Hong Lin Ma
Keyword(s):  
Wind Turbine ◽  
Numerical Method ◽  
Collection Efficiency ◽  
Three Dimensional ◽  
Horizontal Axis ◽  
Ice Accretion ◽  
Horizontal Axis Wind Turbine ◽  
Blade Tip ◽  
Computer Codes ◽  
Multiple Reference

A three dimensional numerical method and its computer codes, which are suitable to predict the process of horizontal axis wind turbine icing, are presented. The method is composed of the Multiple Reference Frame (MRF) method to calculate flowfield of air, an Eulerian method to compute collection efficiency and a three dimensional icing model companying with an iterative arithmetic for solving the model. Ice accretion on a 1.5 MW horizontal axis wind turbine is then computed with the numerical method, and characteristics of droplet collection efficiency and ice shape/type are obtained. The results show that ice on the hub and blade root is slight and it can be neglected comparing with ice near blade tip. From blade tip to root, ice becomes thinner and glaze ice may changes into rime ice.

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