Noise impact assessment for the area of the projected wind farm Süderlügum · 2014-04-29 · GLGH-4275 12 09152 271-R-0001-A Noise impact assessment for the area of the projected

Kaiser-Wilhelm-Koog, 2013-12-09

Dipl.-Ing. Klaus Buchmann Dipl.-Ing. Jörg Dedert

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

Client: Bürgerwindpark Süderlügum GmbH & Co. KG

Clients address: Dorfstraße 11 25923 Ellhöft

Report no.: GLGH-4275 12 09152 271-R-0001-A

Location: Süderlügum

Project no.: 4275 12 09152 271

Status: Final version

Order date: 2012-03-29

Contractor: GL Garrad Hassan Deutschland GmbH Sommerdeich 14 b

25709 Kaiser-Wilhelm-Koog

Author: Dipl.-Ing. Jörg Dedert

(Project engineer)

Approved by: Dipl.-Ing. Klaus Buchmann

(Head of department Acoustics & Inspections)

GLGH-4275 12 09152 271-R-0001-A Noise impact assessment for the area of the projected wind farm Süderlügum

GL Garrad Hassan Deutschland GmbH Page 2 of 16

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

2013-12-09

Original issue (electronic version only)



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



1 Introduction

The order from Bürgerwindpark Süderlügum GmbH & Co. KG dated 2012-03-29 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 3.0-113 with a hub height of 92,5 m and a rotor diameter of 113 m as well as 1 WTG of type SWT 3.0-101 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.



Table 2.1: Technical data of existing and planned wind turbines

WEA No. Manufacturer

Type

Hu

b h

eig

ht

in m

Rat

ed p

ow

er

PW

in k

W

So

un

d p

ow

er le

vel

LW

A in

dB

Imp

uls

ivit

y

KI i

n d

B 1

To

nal

ity

KT

in d

B 2

So

un

d p

ow

er le

vel

LW

A in

dB

fo

r n

ois

e

red

uce

d o

per

atio

n

S_01, S_02 and S_04 to S_08

as well as S_11 and S_12

Siemens SWT 3.0MW-113

92,5 3.000 105,5 3 0 3 0 3

S_09 and S_10 Siemens

SWT 3.0MW-113 92,5 3.000 105,5 3 0 3 0 3 101,5 4

S_03 Siemens

SWT 3.0MW-101 79,5 3.000 107,0 3 0 3 0 3

SV_22 to SV_27 AN Bonus 1.3MW 76 1.300 104,0 5 0 5 0 5

SV_28 and SV_30 Siemens

SWT 2.3MW/93 93 2.300 106,0 3, 5 0 5 0 5

SV_29 Siemens

SWT 2.3MW/93 93 2.300 106,0 5 0 5 0 5 103,0 5

SV_31 Siemens

SWT 2.3MW/93 93 2.300 106,0 5 0 5 0 5 105,0 5

SV_32 REpower 6M 100 6.000 107,0 3 0 3 0 3 105,0 5

SV_33 and SV_ 34 REpower 6M 100 6.000 107,0 3 0 3 0 3

SV 35 Enercon E-101 99 3.000 108,0 3 0 3 0 3

1 according to DIN 45645 [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 2012-04-25. 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.



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.



8 List of references

1. Sechste Allgemeine Verwaltungsvorschrift zum Bundes-Immissionsschutzgesetz, "TA – Lärm Technische Anleitung zum Schutz gegen Lärm", 1998-08-26.

2. DIN 45645 T1, "Einheitliche Ermittlung des Beurteilungspegels für Geräuschimmissionen", 1996-07.

3. Empfehlung des Arbeitskreis „Geräusche von Windenergieanlagen“ der Immissionsschutzbehörden und Messinstitute, "Schallimmissionsschutz im Genehmigungsverfahren von Windenergieanlagen", 1999-10.

4. GL-Garrad Hassan Deutschland GmbH, "SVAC-G-PR-001, Noise Impact Assessment", Document no. GLGH-4256 11 08316 000-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.)



Annex 1: Map of the area



Annex 2: Noise sources



Annex 3: Immission objects and total noise level generated by existing wind turbines



Annex 4: Immission objects and total noise level generated by existing and new wind turbines



Annex 5: Individual noise levels





Annex 6: Contour lines for night time operation of new wind turbines



Annex 7: Contour lines for night time operation of existing wind turbines



Annex 8: Contour lines for night time operation of existing and new wind turbines

Documents

Noise impact assessment for the area of the projected wind farm Süderlügum · 2014-04-29 · GLGH-4275 12 09152 271-R-0001-A Noise impact assessment for the area of the projected