Comparative efficiency of wind turbines with different heights of rotor hubs: performance evaluation for Latvia

The Science of Making Torque from Wind 2014

Bezrukovs, V.P.^1,2 ; Bezrukovs, V.V.^2 ; Zacepins, A.J.^1

Institute of Physical Energetics, Aizkraukles Street 21, Riga, LV-1006, Latvia^1

Ventspils University College, Inzenieru Street 101, Ventspils, LV-3601, Latvia^2

关键词: Comparative efficiencies;    Efficiency comparisons;    Operational efficiencies;    Performance evaluations;    Wind measurement;    Wind shears;    Wind speed and directions;    Wind speed distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/524/1/012113/pdf
DOI  :  10.1088/1742-6596/524/1/012113

来源: IOP

【 摘 要 】

Performance evaluation of wind turbines (WT) for different heights of the rotor hub is made based on the wind speed and direction data obtained in 2009-2013 on-shore in the north of Latvia using a LOGGER 9200 Symphonie measurement system mounted on a 60 m mast. Based on the measurement analysis results, wind speed distribution curves have been modelled for heights of up to 200 m using power and logarithmic (log) law approximation methods. The curves for the modelled Weibull's parameters are plotted in dependence on height. The efficiency comparison is made for different WT types taking into account the distribution of the wind energy potential in height in the Latvian territory. The annual electric energy production was calculated for the WTs with different heights of rotor hubs. In the calculations the technical data on the following WT types were used: E-3120 (50 kW, hub height 20.5/30.5/36.5/42.7 m), E-33 (330 kW, hub height 37/44/49/50 m), E-48 (800 kW, hub height 50/60/75 m) and E-82 (2.3 MW, hub height of 78/85/98/108/138 m).