Fairhaven Turbines Too Close Together -Noise
Posted in the Fairhaven Forum
#1 Jun 13, 2013
Fairhaven wind turbine spacing could be an issue. The industry standard is 5 or more turbine diameters apart or 27 or more acres per turbine on multiple installations .Fairhaven wind turbine hub height 280 feet .One blade 120 feet to total 400 total height . The total blade diameter would be 240 feet .
The turbines were moved on the newest plan to a new lot about 200 feet further than the original plan
Page 12 of 64
The more restricted area was then evaluated for turbine locations. Turbine spacing was optimized to take
best advantage of the prevailing and power winds, avoid turbulence from structures or other site
conditions, and minimize array losses (turbulent air downwind of a turbine can degrade performance of
the next turbine). The turbines were sited three and one half to four rotor diameters apart in a NW to SE
The area within the perimeter of the wind farm will be larger due to spacing of the turbines, but is still useable by the farm.
Typical turbine spacing in wind farms is placing the towers 5 to 10 turbine diameters apart, depending on local conditions.
Two or more wind turbine 26.7 acres per turbine Exhibit 11-5
A wind farm also requires substantial acreage for open space between turbines, however, to maximize their efficiency in capturing the wind and to avoid turbulence that can impede airflow (Exhibit 11-5). The size of the turbine, land characteristics plains, hills, ridges, plateaus and mountains and the direction of the prevailing winds determine the distance needed between wind turbines and turbine rows. One study noted that on a flat site with a single prevailing wind, each turbine requires 26.7 acres, while a site with two prevailing winds requires 59 acres per turbine.42 At present, neither the federal government nor the state has any spacing regulations for wind turbines.43
Page 5 of 7 Siting considerations for one GE 1.5 Megawatt turbine
Depending on setback requirements tens of acres might be necessary to house a single GE 1.5MW turbine.
Hence, megawatt-scale wind turbines cannot be located in densely populated areas.
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