Noise Emission of a 200 kW Vertical Axis Wind Turbine

Energies

Erik Möllerström²  Fredric Ottermo²  Jonny Hylander²  Hans Bernhoff¹ 

[1] Division for Electricity, Department of Engineering Sciences, Uppsala University, Uppsala SE-751 21, Sweden;School of Business, Engineering and Science, Halmstad University, Halmstad SE-301 18, Sweden;

关键词: vertical axis wind turbine (VAWT);    H-rotor;    noise;    noise emission;    sound power level;   

DOI  :  10.3390/en9010019

来源: mdpi

【 摘 要 】

The noise emission from a vertical axis wind turbine (VAWT) has been investigated. A noise measurement campaign on a 200 kW straight-bladed VAWT has been conducted, and the result has been compared to a semi-empirical model for turbulent-boundary-layer trailing edge (TBL-TE) noise. The noise emission from the wind turbine was measured, at wind speed 8 m/s, 10 m above ground, to 96.2 dBA. At this wind speed, the turbine was stalling as it was run at a tip speed lower than optimal due to constructional constraints. The noise emission at a wind speed of 6 m/s, 10 m above ground was measured while operating at optimum tip speed and was found to be 94.1 dBA. A comparison with similar size horizontal axis wind turbines (HAWTs) indicates a noise emission at the absolute bottom of the range. Furthermore, it is clear from the analysis that the turbulent-boundary-layer trailing-edge noise, as modeled here, is much lower than the measured levels, which suggests that other mechanisms are likely to be important, such as inflow turbulence.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.