Camilty Wind Farm - Partnerships for Renewables

Camilty Wind Farm
8.5.23 These conservative modelling assumptions suggest that the model is more likely to overpredict
noise immission levels at any NSR than to under-predict. Additionally, the ISO 9613-
2 method predicts noise levels likely to occur under conditions favourable for noise
propagation, i.e. downwind or under a moderate ground-based temperature inversion (which
usually occurs in the evening or at night).
8.5.24 No correction for prevailing wind conditions has been applied throughout the operational
noise predictions, including the cumulative assessment presented in Section 8.8 below
although the potential for reduced noise immission levels at an upwind NSR is discussed in
more detail later in this Chapter.
8.5.25 The following Table 8.6 presents the predicted noise immission levels from the operational
scheme only, at each of the identified NSR.
Table 8.6 Camilty Wind Farm - Predicted Operational Noise Immission Levels (Nordex
N100 2.5MW) (L A90,10min (dB))
NSR
Wind speed (m/s)
4 5 6 7 8 9 10 11 12
Aberlyne 31.0 33.3 36.6 38.0 38.2 38.2 38.2 38.2 38.2
Camilty Lodge 26.7 29.0 32.3 33.7 33.9 33.9 33.9 33.9 33.9
Colzium 23.4 25.7 29.0 30.4 30.6 30.6 30.6 30.6 30.6
Crosswoodburn 31.0 33.3 36.6 38.0 38.2 38.2 38.2 38.2 38.2
Halfway House 30.2 32.5 35.8 37.2 37.4 37.4 37.4 37.4 37.4
Harburn House 26.8 29.1 32.4 33.8 34.0 34.0 34.0 34.0 34.0
Harburnhead 28.8 31.1 34.4 35.8 36.0 36.0 36.0 36.0 36.0
High Camilty 29.0 31.3 34.6 36.0 36.2 36.2 36.2 36.2 36.2
Over Williamston 24.7 27.0 30.3 31.7 31.9 31.9 31.9 31.9 31.9
Parkview Cottages 26.4 28.7 32.0 33.4 33.6 33.6 33.6 33.6 33.6
Whistle Lodge 25.7 28.0 31.3 32.7 32.9 32.9 32.9 32.9 32.9
8.5.26 In accordance with the guidance set out in ETSU-R-97, maximum operational noise limits
applicable to each NSR have been derived for wind speeds between 4 – 12m/s. Separate
limits for day and night time have been derived. These limits are based on the prevailing
background noise levels (L A90,10min ) presented in Table 8.2 and 8.3.
8.5.27 The following Tables 8.7 and 8.8 present the derived operational noise limits at each wind
speed at each NSR for daytime and night time periods respectively.
March 2013 8-15 ES Chapter 8
Noise
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