Bilaga 9 Ljudberäkningar Gunnilstorp Wind Farm – Noise Propagation Assessment – Summary Report Site Client Date Document Prepared Checked Authorised Gunnilstorp Wind Farm Gunnilstorp Tranhult Vindkraft AB 29/04/2013 1029639/1/B Daniel Marmander Edmund Andrew Rachel Seed Noise modelling The noise calculation model suggested by Swedish “Naturvårdsverket” in the report 6241 “Ljud från vindkraftverk”, was used when calculating the noise levels presented in this report. The k parameter was set to zero, since the turbine noise for the turbines in question do not increase for higher wind speeds. The roughness parameter was set to 0.05, although setting the k parameter to zero renders the result fully independent of the roughness parameter. Sound data for Siemens SWT-2.3-113 turbine at 142.5 m hub height was used to model turbine noise for the Gunnilstorp layout. The octave band spreading was obtained from Siemens; document “E R WP SP EN-10-0000-0247-00”. Sound data for the turbine model is presented in Table B-1, Annex B. The locations of noise sensitive properties (NSPs) have been obtained from the Client. The predicted noise levels are presented in Table 1. The site layout used for the noise calculation is detailed in Table A-1, Annex A. A map detailing the layout, noise sensitive points and ISO lines for noise propagation is presented in Figure C-1, Annex C. All coordinates are given in Sweref 99 TM. ID Easting Northing 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 429479 429181 429422 429519 431347 431394 431431 431482 431266 434842 435660 435416 435558 435510 435548 435211 433629 435109 431647 431792 433609 433322 429997 430046 430032 431162 433862 434082 435203 435180 431379 431420 6366995 6366434 6366138 6365877 6366028 6366122 6366084 6365906 6368531 6365599 6366194 6367097 6367393 6367646 6368242 6368790 6369114 6368996 6369466 6369613 6369136 6369651 6368978 6369083 6369335 6365556 6369765 6370167 6369998 6370039 6366096 6365806 Calculated noise levels (dB(A)) 30.6 29.1 28.8 28.4 33.0 33.4 33.5 33.1 35.9 32.4 29.7 31.1 30.3 30.3 29.4 29.6 33.0 29.5 37.1 37.4 33.0 33.1 36.2 36.6 37.5 31.1 31.6 30.8 28.2 28.2 33.3 32.6 Table 1 Coordinates and calculated noise levels at specified noise sensitive points. The Green House, Forrest Estate, Dalry, Castle Douglas, DG7 3XS, Scotland, UK www.naturalpower.com [email protected] Tel: +44 (0) 1644 430 008 ID Easting Northing 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 431100 432962 432956 431496 431368 431380 431791 431806 431336 429696 429907 431474 431471 431734 430426 430481 430512 428280 428313 428381 428354 428256 428410 428355 426729 427933 429687 430016 430036 430676 430034 430028 430024 429887 430368 431396 431405 427999 428080 6365928 6370717 6370771 6372060 6372111 6372277 6372233 6372339 6372316 6369066 6369103 6372853 6373097 6372832 6373508 6373519 6373552 6373089 6372936 6372662 6372633 6372498 6372380 6372347 6370221 6369487 6369048 6369325 6369869 6368332 6369508 6369595 6369132 6369097 6373768 6373386 6373746 6373181 6373351 Calculated noise levels (dB(A)) 31.9 34.5 34.5 39.3 39.8 39.2 37.5 37.2 39.3 36.9 36.8 37.1 36.4 36.1 38.7 38.5 38.2 37.0 37.6 38.7 38.7 38.7 39.7 39.6 36.4 39.0 36.8 37.6 39.8 34.6 38.3 38.6 36.8 36.7 37.4 35.7 34.3 35.6 35.4 Table 1 Coordinates and calculated noise levels at specified noise sensitive points. The Green House, Forrest Estate, Dalry, Castle Douglas, DG7 3XS, Scotland, UK www.naturalpower.com [email protected] Tel: +44 (0) 1644 430 008 ANNEX A – Turbine coordinates ID 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Easting 428825 428409 429536 430859 430172 429608 429823 427698 429116 429039 431487 429764 428800 430346 428118 431371 429428 430481 432651 433514 432201 433162 433583 Northing 6371104 6370400 6372990 6370795 6371802 6371481 6372603 6370459 6371655 6370511 6371055 6372090 6370008 6372473 6371011 6370541 6370959 6371248 6366988 6366216 6367996 6366559 6367123 Table A-1 Coordinates for Gunnilstorp wind farm. ANNEX B – Turbine Sound Power Levels Octave band (Hz) 63 125 250 500 1000 2000 4000 8000 All Equivalent band level (dB(A)) 79.1 92.1 98.3 99.2 98.8 97.8 90.7 74.3 105.0 Table B-1 Octave band levels for Siemens SWT-2.3-113 running at “Standard setting”. Annex C – Sound propagation map Figure C-1 Noise propagation map