Noise Emission of a 200 kW Vertical Axis Wind Turbine

Erik Möllerström, Fredric Ottermo, Jonny Hylander and Hans Bernhoff
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Erik Möllerström: School of Business, Engineering and Science, Halmstad University, Halmstad SE-301 18, Sweden
Fredric Ottermo: School of Business, Engineering and Science, Halmstad University, Halmstad SE-301 18, Sweden
Jonny Hylander: School of Business, Engineering and Science, Halmstad University, Halmstad SE-301 18, Sweden
Hans Bernhoff: Division for Electricity, Department of Engineering Sciences, Uppsala University, Uppsala SE-751 21, Sweden

Energies, 2015, vol. 9, issue 1, 1-10

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.

Keywords: vertical axis wind turbine (VAWT); H-rotor; noise; noise emission; sound power level (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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