Noise propagation issues in wind energy applications

Prospathopoulos, JM; Voutsinas, SG

dc.contributor.author	Prospathopoulos, JM	en
dc.contributor.author	Voutsinas, SG	en
dc.date.accessioned	2014-03-01T01:22:49Z
dc.date.available	2014-03-01T01:22:49Z
dc.date.issued	2005	en
dc.identifier.issn	0199-6231	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16666
dc.subject	Wind Energy	en
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	OUTDOOR SOUND-PROPAGATION	en
dc.subject.other	ATMOSPHERIC ABSORPTION	en
dc.subject.other	TURBULENCE	en
dc.subject.other	BOUNDARY	en
dc.title	Noise propagation issues in wind energy applications	en
heal.type	journalArticle	en
heal.identifier.primary	10.1115/1.1862257	en
heal.identifier.secondary	http://dx.doi.org/10.1115/1.1862257	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	The prediction of noise emitted from operating wind turbines is important to planners in order to avoid the possibility of surpassing the allowable limits close to residential areas. To this end, the wave equation is solved, taking into account the atmospheric and ground characteristics that affect sound propagation. In the present paper a ray tracing methodology capable of performing axisymmetric calculations of the sound field around an isolated source is used. The methodology simulates all the main physical mechanisms that influence sound propagation and performs calculations for the whole range of acoustic frequencies. In the case of more sources, a quasi-3D calculation is implemented, superposting the contributions from all sources. Application to single wind turbines is validated with available measurements. The effect of various parameters such as ground impedance, temperature, humidity, turbulence, and wind velocity is investigated for an isolated wind turbine as well as for wind parks. It is shown that ground and atmospheric absorption are important at the low and high frequency ranges, respectively. In flat terrain cases, simple propagation models may also give satisfactory predictions of the overall sound pressure levels. However in complex terrain cases, the wind velocity and the relief of the topography can significantly affect noise propagation, suggesting the necessity for using sophisticated propagation models, such as the current one.	en
heal.publisher	ASME-AMER SOC MECHANICAL ENG	en
heal.journalName	JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME	en
dc.identifier.doi	10.1115/1.1862257	en
dc.identifier.isi	ISI:000229414500010	en
dc.identifier.volume	127	en
dc.identifier.issue	2	en
dc.identifier.spage	234	en
dc.identifier.epage	241	en