Noise impact assessment on the basis of onsite acoustic noise immission measurements for a representative wind farm

Wind energy, comprising a techno-economically mature and clean technology, is not entirely free of impacts on the environment and human health. In this context, noise still comprises a major siting criterion, even hindering the approval for the installation of new wind power projects. The present study evaluates the noise level immission using real acoustic measurements of a representative wind farm, while these measurements are also compared with simulation results of two well-known noise immission prediction models. Emphasis is firstly given on the development of a reliable experimental process and secondly on the estimation of the real noise impact of the existing wind turbines dissociated by the background noise for several wind speed values and distances from the wind farm. According to the results obtained, validation of the prediction models is provided by observing a fairly good agreement between experimental and simulated results. Furthermore, wind farms may be characterized as relatively low noise emission sources, compared to other industrial units or conventional power plants, as the sound pressure level (SPL) at a distance of 300 m away is almost 45 dB(A), i.e. not a prohibitive value for human activities in the wind farm’s broader area.

[1]  Christopher R. Jones,et al.  Understanding 'local' opposition to wind development in the UK: How big is a backyard? , 2010 .

[2]  Michael L. Morrison,et al.  Wind Energy Technology, Environmental Impacts of , 2004 .

[3]  Eja Pedersen,et al.  Living in the Vicinity of Wind Turbines — A Grounded Theory Study , 2007 .

[4]  Eric R. A. N. Smith,et al.  Public understanding of and support for wind power in the United States , 2010 .

[5]  Pieter Sijtsma,et al.  Nationaal Lucht-en Ruimtevaartlaboratorium National Aerospace Laboratory NLR NLR-TP-2007-798 Location and quantification of noise sources on a wind turbine , 2008 .

[6]  R. Amiet.  Acoustic radiation from an airfoil in a turbulent stream , 1975 .

[7]  M. Zangeneh,et al.  Numerical prediction of wind turbine noise , 2011 .

[8]  M. Björkman,et al.  Long time measurements of noise from wind turbines , 2004 .

[9]  Gianfranco Guidati,et al.  Comparison of measured and predicted airfoil self-noise with application to wind turbine noise reduction , 1997 .

[10]  Spyros G. Voutsinas,et al.  Application of a ray theory model to the prediction of noise emissions from isolated wind turbines and wind parks , 2007 .

[11]  Jens Nørkær Sørensen,et al.  Modeling of Aerodynamically Generated Noise From Wind Turbines , 2005 .

[12]  Soogab Lee,et al.  Integrated numerical method for the prediction of wind turbine noise and the long range propagation , 2010 .

[13]  Gianfranco Guidati,et al.  Prediction of Turbulent Inflow and Trailing-Edge Noise for Wind Turbines , 2005 .

[14]  N. Fujisawa,et al.  Experimental study on flow and noise characteristics of NACA0018 airfoil , 2007 .

[15]  A. E. Filios,et al.  Broadband noise radiation analysis for an HAWT rotor , 2007 .

[16]  Wen Zhong Shen,et al.  An Aerodynamic Noise Propagation Model for Wind Turbines , 2005 .

[17]  Thomas F. Brooks,et al.  Airfoil self-noise and prediction , 1989 .

[18]  Stephen Ansolabehere,et al.  Public Attitudes Toward Construction of New Power Plants , 2009 .

[19]  Frits van den Berg,et al.  Can road traffic mask sound from wind turbines? Response to wind turbine sound at different levels of road traffic sound. , 2010 .

[20]  M. Slattery,et al.  Public attitudes of wind energy in Texas: Local communities in close proximity to wind farms and their effect on decision-making , 2010 .

[21]  Gianfranco Guidati,et al.  Wind Turbine Noise , 1996 .

[22]  Ewald Krämer,et al.  Design and Wind-Tunnel Verification of Low-Noise Airfoils for Wind Turbines , 2006 .