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Energies 2016, 9(1), 19; doi:10.3390/en9010019

Noise Emission of a 200 kW Vertical Axis Wind Turbine

1
School of Business, Engineering and Science, Halmstad University, Halmstad SE-301 18, Sweden
2
Division for Electricity, Department of Engineering Sciences, Uppsala University, Uppsala SE-751 21, Sweden
*
Author to whom correspondence should be addressed.
Academic Editor: Frede Blaabjerg
Received: 31 October 2015 / Revised: 11 December 2015 / Accepted: 22 December 2015 / Published: 29 December 2015
(This article belongs to the Special Issue Wind Turbine 2015)
View Full-Text   |   Download PDF [1255 KB, uploaded 29 December 2015]   |  

Abstract

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. View Full-Text
Keywords: vertical axis wind turbine (VAWT); H-rotor; noise; noise emission; sound power level vertical axis wind turbine (VAWT); H-rotor; noise; noise emission; sound power level
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Möllerström, E.; Ottermo, F.; Hylander, J.; Bernhoff, H. Noise Emission of a 200 kW Vertical Axis Wind Turbine. Energies 2016, 9, 19.

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