United Utilities
Operational Noise Assessment
Proposed Fleetwood Wind Turbine
ANNEX 1 - Extracts of Noise Data for the EWT DW54
500kW Wind Turbine
Emergya Wind Technologies BV
Engineering
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Doc code:
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Creation Date:
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Checked by:
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Checked Date:
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Approved by:
TY
Approved Date:
07-12-11
Title:
Specification
Sound power warranty levels
DW52/54 500kW
Revision
Date
Author
Approved
Description of changes
02
14-03-12
AB
TY
Modifications based on new IEC measurements
01
09-12-11
AB
TY
correction
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Emergya Wind Technologies BV
Building ‘Le Soleil’ - Computerweg 1 - 3821 AA Amersfoort - The Netherlands
T +31 (0)33 454 0520 - F +31 (0)33 456 3092 - www.ewtinternational.com
© Copyright Emergya Wind Technologies BV, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
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Sound power warranty levels DW52/54 500kW
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Sound power levels
The warranted sound power levels are presented with reference to IEC 61400-11:2002.
Vwind at 10m height
DW52
DW54
5 m/s
96,5 dB(A)
97.0 dB(A)
6 m/s
97.5 dB(A)
98.0 dB(A)
7 m/s
98.5 dB(A)
99.0 dB(A)
8 m/s
99.5 dB(A)
100.0 dB(A)
9 m/s
100.3 dB(A)
100.5 dB(A)
10 m/s
100.5 dB(A)
100.5 dB(A)
Sound power level Lw in dB(A)
The warranted sound power levels are based on actual measurements executed by an independent noise
measurement institute according to the preferred methods set out in IEC-61400-11.
Uncertainty levels are included in the warranted sound power levels.
At 5m/s a maximum tonal noise penalty of 2,5dB shall be considered according to ETSU-R-97 guidelines.
The measured third octave sound power levels are available upon request.
The values given in the table are valid for normal operational mode (rotation speed 0-24 RPM)
The calculation of the standardized wind speed at 10m height according to IEC 61400-11 is based on a terrain
roughness length Z0=0,05m.
In case validation measurements have to be performed, they should be executed according to the preferred
methods set out in IEC-61400-11 by an independent measurement institute which is accredited to ISO/IEC
17025 to conduct measurements of wind turbine noise emissions.
EWT reserves the right to make modifications or adjust settings in order to comply with the warranted sound
power levels.
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
Emergya Wind Technologies BV
DW54
Category:
Specification
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Doc code:
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Created by:
RH
Creation Date:
09-05-12
Checked by:
LE
Checked Date:
09-05-12
Approved by:
TY
Approved Date:
09-05-12
Title:
Specification
Sound power level DW54 - 500kW
Revision
Date
Author
Approved
Description of changes
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Emergya Wind Technologies BV
Building ‘Le Soleil’ - Computerweg 1 - 3821 AA Amersfoort - The Netherlands
T +31 (0)33 454 0520 - F +31 (0)33 456 3092 - www.ewtinternational.com
© Copyright Emergya Wind Technologies BV, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
Category:
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Contents
1
Introduction ___________________________________________________________ 3
2
Measurements _________________________________________________________ 4
3
Results _______________________________________________________________ 5
3.1
Corrected sound power level graphical ________________________________________________ 6
3.2
Tonal Audibility__________________________________________________________________ 7
3.3
Uncertainty_____________________________________________________________________ 8
Appendix 1 Third octave band sound power levels _____________________________________ 9
Appendix 2 measured sound pressure levels _________________________________________ 10
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
Category:
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1 Introduction
Following information with regard to the sound power level measurements, are distillated from measurement
data of a DIRECTWIND 54 500kW turbine, located at the Elbaweg in Venhuizen, the Netherlands.
The measurements were performed by a third party according to the International Standard IEC 64100-11
December 2002: "Wind turbine generator systems – Part 11: Acoustic noise measurement techniques ".
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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2 Measurements
The measurements have been performed by measuring the sound pressure levels in the third octave bands of
25 Hz to 10,000 Hz at the reference point downwind of the operating turbine. The background noise level was
measured during standstill of the turbine.
Measurements were carried out on the ground on a hard board according to the IEC standard. This method
doubles the pressure on the microphone which raises the sound pressure level with +6 dB(A) compared to free
field measurements.
The measured sound pressure levels can be found in Appendix 2 measured sound pressure levels.
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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3 Results
The sound power levels are calculated from the measured sound pressure levels according to IEC-61400-11.
The wind velocities have been corrected for a reference roughness Z0 of 0.05m by applying a factor of 1.1 on
the measured wind velocity, and the sound power levels have been calculated for a reference height of 10m.
Table 3.1 gives the calculated sound power levels at the different wind speeds, and the calculated octave band
power levels. Figure 3.1 gives the calculated 3rd octave band sound power levels, the values for these can be
found in Appendix 1 Third octave band sound power levels.
Sound power level Lw in dB(A) and dB
middle frequency of the octave bands [hz]
Wind speed at a height of 10m
31.5
63
125
250
500
1k
2k
4k
8k
Wind 5 m/s
95.3 dB(A)
95.0 dB
67.3
76.3
82.5
89.0
90.3
87.9
85.3
80.6
71.0
Wind 6 m/s
96.5 dB(A)
96.6 dB
68.2
78.0
84.1
90.7
92.0
89.5
86.7
81.4
72.4
Wind 7 m/s
97.8 dB(A)
97.7 dB
69.5
79.3
85.5
91.8
93.0
90.7
88.0
82.2
72.9
Wind 8 m/s
98.9 dB(A)
98.8 dB
70.9
80.7
86.9
92.6
94.1
92.0
89.2
83.0
72.8
Wind 9 m/s
99.6 dB(A)
99.7 dB
72.4
82.1
88.3
93.5
94.7
92.9
90.3
83.5
72.0
Wind 10 m/s
99.8 dB(A)
99.5 dB
72.2
81.6
87.8
93.1
94.4
93.0
90.5
83.6
71.8
Table 3.1 Sound power levels and the octave band data
100.0
90.0
80.0
Lw [dB(A)]
70.0
60.0
50.0
40.0
Wind 5 m/s
Wind 6 m/s
Wind 7 m/s
30.0
Wind 8 m/s
20.0
Wind 9 m/s
10.0
Wind 10 m/s
25Hz
31.5Hz
40Hz
50Hz
63Hz
80Hz
100Hz
125Hz
160Hz
200Hz
250Hz
315Hz
400Hz
500Hz
630Hz
800Hz
1kHz
1.25kHz
1.6kHz
2kHz
2.5kHz
3.15kHz
4kHz
5kHz
6.3kHz
8kHz
10kHz
12.5kHz
0.0
Figure 3.1 The 3rd octave band Sound Power Level spectra
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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3.1 Corrected sound power level graphical
Figure 3.2 below gives all the calculated sound power levels at the different wind speeds at reference conditions
(h = 10 m and z0 = 0.05 m) and after correction for the background noise. The figure also gives the 4th order
regression on this curve:
Figure 3.2 the calculated sound power level at different wind speeds
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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3.2 Tonal Audibility
The audibility of the tones in the sound was analysed at the reference position and is given in Table 3.2 Tonal
Audibility. The most important frequencies are 2.2 and 4.4 kHz. In Table 3.2 also the tonal penalty according to
ETSU-R-97 (The assessment and rating of noise from wind farms – September 2006) is given. For the tone
level of 3.3, the ETSU penalty of 2.5 dB can be found in Figure 3.3. No penalties are incurred for audibility
levels below 2.0 dB.
According to ETSU-R-97, the tonal penalty should be added at the receiver for the specific wind speed at which
the tonal audibility is present.
Wind @ 10 m ([m/s]
5
6
7
8
9
ΔLA [dB(A)]
3.3
0.9
1.5
0.7
-0.7
ETSU Penalty [dB]
2.5
-
-
-
-
Table 3.2 Tonal Audibility
Figure 3.3 Tonal penalty according to ETSU-R-97
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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3.3 Uncertainty
The following Table 3.3 gives the number of measurements and the uncertainty in dB(A) for each different wind
speed.
Wind Class
Number of measurements
Uncertainty [dB(A)]
Wind 5 m/s
4
1.7
Wind 6 m/s
37
1.4
Wind 7 m/s
77
1.2
Wind 8 m/s
68
0.9
Wind 9 m/s
26
0.9
Wind 10 m/s
9
0.7
Table 3.3 Number of measurements and uncertainty
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
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Appendix 1 Third octave band sound power levels
V10[m/s]
25Hz
31.5Hz
40Hz
50Hz
63Hz
80Hz
100Hz
125Hz
160Hz
Wind 5 m/s
56,4
61,6
65,4
68,0
71,2
73,6
75,7
77,6
79,2
Wind 6 m/s
57,6
63,0
66,1
69,6
72,7
75,5
77,4
79,2
80,7
Wind 7 m/s
59,0
64,0
67,5
71,0
73,9
76,8
79,2
80,5
82,0
Wind 8 m/s
60,5
65,2
68,9
72,6
75,3
78,1
80,9
82,0
83,3
Wind 9 m/s
62,4
66,7
70,4
73,7
76,9
79,6
81,7
83,5
84,8
Wind 10 m/s
62,3
66,5
70,1
73,4
76,4
79,1
81,3
83,0
84,3
V10[m/s]
200Hz
250Hz
315Hz
400Hz
500Hz
630Hz
800Hz
1kHz
1.25kHz
Wind 5 m/s
81,6
84,0
85,9
85,7
85,0
85,9
84,1
83,4
81,7
Wind 6 m/s
83,8
85,5
87,5
87,4
86,8
87,5
85,7
84,9
83,2
Wind 7 m/s
85,6
86,4
88,4
88,4
87,8
88,6
86,9
86,1
84,5
Wind 8 m/s
87,1
86,9
89,2
89,2
88,8
89,8
88,2
87,4
85,9
Wind 9 m/s
88,7
87,4
89,7
89,8
89,4
90,5
89,0
88,2
87,0
Wind 10 m/s
88,3
86,9
89,4
89,5
89,1
90,3
89,0
88,2
87,2
V10[m/s]
1.6kHz
2kHz
2.5kHz
3.15kHz
4kHz
5kHz
6.3kHz
8kHz
10kHz
12.5kHz
Wind 5 m/s
80,2
81,0
80,1
76,6
76,7
73,4
69,2
65,1
60,4
55,0
Wind 6 m/s
81,5
82,7
81,6
77,8
77,2
73,9
70,4
66,6
62,3
57,0
Wind 7 m/s
82,9
83,9
82,7
78,9
77,8
74,3
70,9
67,1
62,7
57,2
Wind 8 m/s
84,3
85,2
83,7
80,1
78,3
74,7
70,9
67,0
62,4
56,5
Wind 9 m/s
85,5
86,3
84,4
80,9
78,5
74,5
70,2
66,1
60,8
54,6
Wind 10 m/s
86,0
86,6
84,4
81,2
78,4
74,3
69,9
66,0
61,3
55,5
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
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Appendix 2 measured sound pressure levels
Figure 0.1 Measured sound pressure levels 11 November 2011
Figure 0.2 Measured sound pressure levels 15 February 2012
© Copyright Emergya Wind Technologies bv, The Netherlands. Reproduction and/or disclosure to third parties of this document
or any part thereof, or use of any information contained therein for purposes other than provided for by this document, is not
permitted, except with the prior and express permission of Emergya Wind Technologies BV, The Netherlands.
TNEI SUMMARY ANALYSIS OF NOISE DATA FOR : EWT-DW54 500KW-NA blade-Full mode-50hub
Turbine identification:
Available Noise Document(s) Considered in the analysis of this turbine:
Manufacturer: EWT
Doc. Date
Doc. Name
Manufacturer doc:
14/03/2012
S-1005020-R02-1. No hub height is referenced, assumed 50m but need seek clarification.
Blade Type/Name: NA
Test Report1:
09/05/2012
S-1005030. No hub height is referenced, assumed 50m but need seek clarification. Not an independent report, measurments dated Feb 2012 at the Elbaweg in Ve
Operational Mode: Full
Test Report2:
Model Name: DW54 500KW
Hub Height: 50
Test Report3:
Summary of Sound Power Levels(LwAeq) at various wind speeds:
Wind Speed (standardised 10m)
5
6
7
8
9
10
Manufacturer Lw raw as found in document
2
3
4
97.0
98.0
99.0
100.0
100.5
100.5
Manufacturer specified Lw +Manufacturer Uc+TNEI Uc (used for modeling by TNEI)
100.5
99.0
100.0
101.0
101.5
101.5
11
12
Comment:
Summary of Octave Data (LwAeq) used for modelling:
Octave data is from Test Report1 at 10m/s
Overall
Frequency (Hz)
31.5
63
125
250
500
1000
2000
4000
8000
Octave data at 10m/s from raw 1/3 octave or octave
72.2
81.6
87.8
93.1
94.4
93.0
90.5
83.6
71.8
99.5
Octave data at 10m/s adjusted by TNEI to obtain 101.5dB(A)
74.2
83.6
89.8
95.1
96.4
95.0
92.5
85.6
73.8
101.5
Comment:
Octave as presented in Table 3.1 at 10m/s
Plot of Octave Data
Octave data at 10m/s adjusted by TNEI
to obtain 101.5dB(A)
Sound Power Level (dB(A))
120
Octave data at 10m/s from raw 1/3
octave or octave
100
80
60
40
20
0
31.5
63
125
250
500 1000 2000 4000 8000
Frequency (Hz)
Additional Comment:
Data analysed in accordance with the guidance from the IOA GPG May 2013.
TNEI-WTDA-NOISE V3.0-EWT-DW54 500KW-NA blade-Full mode-50hub-2013-10-24-MC-GC
United Utilities
Operational Noise Assessment
Proposed Fleetwood Wind Turbine
ANNEX 2 - Correspondence with the Environmental
Health Department at Wyre Council
Page 1 of 3
Gemma Clark
From:
Jason Baldwin
Sent:
23 October 2013 15:17
To:
Gemma Clark
Subject: Fwd: 7440c-Fleetwood Noise Assessment
---------- Forwarded message ---------From: McArthur, David <David.McArthur@wyre.gov.uk>
Date: 20 August 2013 15:39
Subject: RE: 7440c-Fleetwood Noise Assessment
To: Jason Baldwin <jason.baldwin@tnei.co.uk>
Cc: Matthew Lambert <matthew.lambert@tnei.co.uk>
Matthew,
I have now refreshed my memory of the details provided and I am happy that the proposed locations are
representative. I am not aware of any other schemes in the area that would impact on the monitoring. I may
be available to accompany you when the equipment is installed so please let me know when this is planned
and I will see what I can do.
Regards,
David McArthur.
David McArthur
Environmental Health Officer
Wyre Council
David.McArthur@wyre.gov.uk
01253 887414
Civic Centre, Breck Road, Poulton-le-Fylde, Lancashire, FY6 7PU
The Wyre Council email disclaimer can be found at www.wyre.gov.uk/disclaimer.
From: Jason Baldwin [mailto:jason.baldwin@tnei.co.uk]
Sent: 15 July 2013 17:54
23/10/2013
Page 2 of 3
To: McArthur, David
Cc: Matthew Lambert
Subject: 7440c-Fleetwood Noise Assessment
Dear Mr McArthur,
Following your conversation earlier with my colleague Matt Lambert, I enclose the letter and plan
outlining the proposed wind turbine noise assessment at United Utilities Fleetwood site.
As discussed, apologies for the short notice but we propose to start background noise monitoring
next week and so would be grateful to receive your comments regarding the noise assessment
methodology and monitoring locations as soon as you are able.
If you require any further information, please do not hesitate to contact either myself on the number below
or my colleague Matt Lambert (0191 211 1404).
Kind regards,
Jason Baldwin
Assistant Technical Consultant
TNEI Services Limited
Tel:
+44 (0)191 2111412
Fax:
+44 (0)191 2111432
Website: http://www.tnei.co.uk
E-mail: jason.baldwin@tnei.co.uk
Address: Milburn House, Dean Street, Newcastle upon Tyne, NE1 1LE
Registered in England & Wales No. 03891836, Registered office: Chester House, 76-78 Chertsey Road,
Woking, United Kingdom, GU21 5BJ
-Jason Baldwin
Assistant Technical Consultant
TNEI Services Limited
Tel:
+44 (0)191 2111412
Fax:
+44 (0)191 2111432
Website: http://www.tnei.co.uk
E-mail: jason.baldwin@tnei.co.uk
Address: Milburn House, Dean Street, Newcastle upon Tyne, NE1 1LE
23/10/2013
United Utilities Fleetwood - Noise Kit Installation Report
Reproduced under Google Earth pro licence
Matthew Lambert (TNEI Services Ltd) and David McArthur (EHO, Wyre Council) were in attendance on
site to agree locations for noise kit installation on 22nd August 2013. Once access was agreed with the
Broadwater Caravan Park a noise kit was installed on the 9th September 2013 by Niall Smith (TNEI
Services Ltd).
H1- Harbour Village
Reproduced from Red Row Homes figure as updated
aerial photography not currently available
Installation Photographs:
H1 – E
H1 – S
H1 – W
H1 – N
Location Description
Kit installed 22/08/13.
The noise kit was placed on the patio area in the rear garden at 25 Windward Avenue. The noise kit
was placed in this position due to it being the main amenity area used by the residents, as well as
providing a more sheltered position than at the front of the property.
The sounds that were audible during the installation were construction noise, distant road traffic as
well as occasional local road traffic, model aeroplanes being flown in the vicinity, and birdsong.
The noise meter was located in a free field position, greater than 3.5m from any hard reflecting
surface except the ground.
H2- Laurel Avenue
Reproduced under Google Earth pro licence
Installation Photographs:
H2 – N
H2 – S
H2 – E
H2 – W
Location Description
Kit installed 22/08/13.
This location was included as an additional location to those originally agreed with the EHO at Wyre
Council while access to the Broadwater Caravan Park was confirmed. It was considered to be a similar
distance from the A585 road as the monitoring location at H4- Broadwater Caravan Park.
The noise kit was placed in the patio area of the rear garden at 4 Laurel Avenue which was the main
amenity space.
The sounds that were audible during the installation were road traffic noise from the A585 road to the
east of the property, occasional aircraft noise and a dog barking.
The noise meter was located in a free field position, greater than 3.5m from any hard reflecting
surface except the ground.
Location Description
Kit installed 22/08/13.
This location was included as an additional location to those originally agreed with the EHO at Wyre
Council while access to the Broadwater Caravan Park was confirmed. It was considered to be a similar
distance from the A585 road as the monitoring location at H4- Broadwater Caravan Park.
The noise kit was placed in the patio area of the rear garden at 4 Laurel Avenue which was the main
amenity space.
The sounds that were audible during the installation were road traffic noise from the A585 road to the
east of the property, occasional aircraft noise and a dog barking.
The noise meter was located in a free field position, greater than 3.5m from any hard reflecting
surface except the ground.
H3- Fairfield Court
Reproduced under Google Earth pro licence
Installation Photographs:
H3 – N
H3 – S
H3 – E
H3 – W
Location Description
Kit installed 22/08/13.
This monitoring location was chosen to be representative of the surrounding residential properties,
away from the main road and also to provide a large enough amenity space suitable for kit installtion.
The noise kit was placed on the patio on the eastern side of the rear garden at 17 Fairfield Court. The
location was considered to be the main amenity area used by the residents.
The sounds that were audible during the installation were mainly from road traffic noise (including on
the A585).
The noise meter was located in a free field position, greater than 3.5m from any hard reflecting
surface except the ground.
H4- Broadwater Caravan Park
Reproduced under Google Earth pro licence
Installation Photographs:
H4 – N
H4 – S
H4 – E
H4 – W
Location Description
Kit installed 09/09/13.
The monitoring location was chosen to be representative of the background noise environment for the
properties at the Caravan Site while not being unduly influenced by road traffic noise compared to
some areas of the site which were closer to the main road. The exact position of monitoring
equipment was was agreed with the site manager, providing a suitable relatively sheltered noise
monitoring location while not also impacting upon caravan park operations.
The sounds that were audible during the installation were mainly road traffic noise on the A585 and
B5268, as well as rustling foliage, and birdsong.
The noise meter was located in a freefield position, greater than 3.5m from any hard reflecting
surface except the ground.