Noise impact assessment for the area of the projected wind farm Süderlügum

Transcription

1 Noise impact assessment for the area of the projected wind farm Süderlügum Client: Clients address: Report no.: Location: Bürgerwindpark Süderlügum GmbH & Co. KG Dorfstraße Ellhöft GLGH R-0001-A Süderlügum Project no.: Status: Final version Order date: Contractor: GL Garrad Hassan Deutschland GmbH Sommerdeich 14 b Kaiser-Wilhelm-Koog Author: Approved by: Dipl.-Ing. Jörg Dedert (Project engineer) Dipl.-Ing. Klaus Buchmann (Head of department Acoustics & Inspections) Kaiser-Wilhelm-Koog, Dipl.-Ing. Klaus Buchmann Dipl.-Ing. Jörg Dedert

2 Important notice 1. Extracts may be copied from this report only with the written consent of GL Garrad Hassan Deutschland GmbH. It comprises a total of 16 pages including appendices. 2. All results given in this report relate only to the specified test object in its constellation and under the conditions prevailing during the assessment. Revision History Issue Issue date Summary A Original issue (electronic version only) GL Garrad Hassan Deutschland GmbH Page 2 of 16

3 Table of contents 1 Introduction 4 2 Wind turbines taken into account 4 3 Other sources 5 4 Chosen points of noise impact 5 5 Calculation and results 6 6 Reflection 6 7 Review of results 6 8 List of references 7 Annex Annex 1: Map of the area 8 Annex 2: Noise sources 9 Annex 3: Immission objects and total noise level generated by existing wind turbines 10 Annex 4: Immission objects and total noise level generated by existing and new wind turbines 11 Annex 5: Individual noise levels 12 Annex 6: Contour lines for night time operation of new wind turbines 14 Annex 7: Contour lines for night time operation of existing wind turbines 15 Annex 8: Contour lines for night time operation of existing and new wind turbines 16 List of tables Table 2.1: Technical data of existing and planned wind turbines 5 GL Garrad Hassan Deutschland GmbH Page 3 of 16

4 1 Introduction The order from Bürgerwindpark Süderlügum GmbH & Co. KG dated required GL Garrad Hassan Deutschland GmbH (GL GH) to determine the noise impact at the relevant immission points (IPs) surrounding the projected wind turbines (wind turbine generators or WTGs) at Süderlügum wind farm in the administrative district of North Frisia. All calculations have been performed according to GL GH management system procedure SVAC-G-PR-001 [4]. The noise propagation calculations documented in this report have been carried out compliant with the German regulation Technische Anleitung zum Schutz gegen Lärm (TA-Lärm) [1]. For the calculations following propagation condition are assumed for the turbines under assessment: Wind speed of 10 m/s at a 10 m height above ground level or 95% of rated power. 2 Wind turbines taken into account Within the projected area the Bürgerwindpark Süderlügum GmbH & Co. KG plans to install 11 new wind turbines (WTG) of type SWT with a hub height of 92,5 m and a rotor diameter of 113 m as well as 1 WTG of type SWT with a hub height of 79,5 m and a rotor diameter of 101 m. These turbine types are manufactured by Siemens. See table. 2.1 for existing wind turbines in the project area which are labelled with SV. Coordinates of turbine locations were provided by the customer. A graphic overview is included in the annex. GL Garrad Hassan Deutschland GmbH Page 4 of 16

5 Table 2.1: Technical data of existing and planned wind turbines WEA No. Manufacturer Type Hub height in m Rated power PW in kw Sound power level LWA in db Impulsivity KI in db 1 Tonality KT in db 2 Sound power level LWA in db for noise reduced operation S_01, S_02 and S_04 to S_08 as well as S_11 and S_12 S_09 and S_10 S_03 Siemens SWT 3.0MW-113 Siemens SWT 3.0MW-113 Siemens SWT 3.0MW , , , , ,5 4 79, , SV_22 to SV_27 AN Bonus 1.3MW , SV_28 and SV_30 SV_29 SV_31 Siemens SWT 2.3MW/93 Siemens SWT 2.3MW/93 Siemens SWT 2.3MW/ ,0 3, , , , ,0 5 SV_32 REpower 6M , ,0 5 SV_33 and SV_ 34 REpower 6M , SV 35 Enercon E , according to DIN [2] 2 according to recommendations from Arbeitskreis Geräusche von Windenergieanlagen [3] 3 manufacturer s warranty 4 manufacturer's data for noise-reduced operating mode 5 permissible sound power level including possible surcharge according to building permit 3 Other sources A site survey was conducted by Dipl.-Ing. Jörg Dedert on All IP were checked for other noticeable and relevant sound sources like cooling fans. Relevant noises from other sources were not identified during the course of the survey. 4 Chosen points of noise impact The surrounding area of the projected wind farm is mainly used as agricultural land. All nearby residential houses which could be subject to increased noise immission are taken into account as immission points (IP). The surveyor classified nearby houses as village area or mixed use area according to TA-Lärm. This leads to a permissible immission level of 45 db(a) in the night time at these IP. An overview of all relevant IP is shown in the annex. GL Garrad Hassan Deutschland GmbH Page 5 of 16

6 5 Calculation and results The noise immission level is calculated for all chosen IPs. Results are the maximum noise level generated by the existing turbines as well the new turbines alone. Finally the total noise level generated by existing and new turbines is calculated. All results are shown in the annex. All calculations have been performed for all chosen IP. The projected layout (with given prerequisites) does not lead to an exceedance of permissible noise levels at the residential buildings near to the new wind farm. 6 Reflection Based on the layout of the residential buildings around the wind farm increased noise levels caused by reflection effects are not expected. 7 Review of results From the point of view of the surveyor an impermissible high disturbance of residents according to TA-Lärm does not occur under given conditions in the night time if the projected WTGs are able to keep sound power level within valid range. GL Garrad Hassan Deutschland GmbH Page 6 of 16

7 8 List of references 1. Sechste Allgemeine Verwaltungsvorschrift zum Bundes-Immissionsschutzgesetz, "TA Lärm Technische Anleitung zum Schutz gegen Lärm", DIN T1, "Einheitliche Ermittlung des Beurteilungspegels für Geräuschimmissionen", Empfehlung des Arbeitskreis Geräusche von Windenergieanlagen der Immissionsschutzbehörden und Messinstitute, "Schallimmissionsschutz im Genehmigungsverfahren von Windenergieanlagen", GL-Garrad Hassan Deutschland GmbH, "SVAC-G-PR-001, Noise Impact Assessment", Document no. GLGH M-0328-B. (This document is part of the management system of the GL Garrad Hassan Deutschland GmbH. It is possible to view this document at GL GH.) GL Garrad Hassan Deutschland GmbH Page 7 of 16

8 Annex 1: Map of the area GL Garrad Hassan Deutschland GmbH Page 8 of 16

9 Annex 2: Noise sources GL Garrad Hassan Deutschland GmbH Page 9 of 16

10 Annex 3: Immission objects and total noise level generated by existing wind turbines GL Garrad Hassan Deutschland GmbH Page 10 of 16

11 Annex 4: Immission objects and total noise level generated by existing and new wind turbines GL Garrad Hassan Deutschland GmbH Page 11 of 16

12 Annex 5: Individual noise levels GL Garrad Hassan Deutschland GmbH Page 12 of 16

13 GL Garrad Hassan Deutschland GmbH Page 13 of 16

14 GLGH R-0001-A Annex 6: Contour lines for night time operation of new wind turbines GL Garrad Hassan Deutschland GmbH Page 14 of 16

15 GLGH R-0001-A Annex 7: Contour lines for night time operation of existing wind turbines GL Garrad Hassan Deutschland GmbH Page 15 of 16

16 GLGH R-0001-A Annex 8: Contour lines for night time operation of existing and new wind turbines GL Garrad Hassan Deutschland GmbH Page 16 of 16