Wind Turbine Form And Design
A wind turbine comprises a tower that supports a nacelle which contains the electric generator and to which the turbine blades attach via a hub. Further guidance on wind turbines isavailable in the Scottish Government Planning Advice Note “Onshore wind Turbines”.
The landscape and visual impacts of a wind turbine vary not only with its size, but also with the make and model of the turbine proposed. Turbines of the same height may have varying appearances due to their different design and technical characteristics. There is an incre asingly varied selection of turbine designs now available, especially in the lower height ranges. For further detail see our guidance on the siting and design of small scale turbines.
It can be difficult for wind turbine developers to specify the actual model of turbine to be used because market availability, costs, and turbine technology may change during the period between submitting an application and actual construction. However, they will usually have a shortlist of preferred models for consideration and applications should include details of these. The LVIA and EIA should assess, as far as is possible, impacts of the model within the shortlist that represents the ‘worst case scenario’.
Turbine properties which are important when choosing the most appropriate model for a site include:
– the proportion of blade length to tower height;
–overall height to blade tip, colour and individual design
–the turbine’s dynamic impact, resulting from rotation of its blades (larger, slow moving blades will have a very different impact from shorter, faster moving blades which may give the impression of increased clutter); and
–consistency with other existing and consented turbines in the vicinity.
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