FAQ - Wind Farms



QUESTIONS:
·  How many households will turbines supply with electricity?
·  Will TV reception be affected?
·  Will the value of my property be affected?
·  How much does a wind farm project cost?
·  How many jobs will be created?
·  What effect has a wind farm on electricity prices?
·  Power quality / security of supply?
·  How noisy are the turbines?
·  How much space is needed to install a turbine?
·  How far apart are turbines spaced ?
·  How is the electricity transported?
·  Will there be navigation lights on the turbines?
·  Why are turbines painted white?
·  What kind of effect on wildlife may occur?
·  How much Greenhouse Gases could be reduced?
·  Will there be a public display / information area?
·  Does wind farming affect tourism?
ANSWERS:
 How many households will turbines supply with electricity?

A modern 1.75 MW wind turbine will produce approximately 5 million kilowatt hours of generation in a year. This is equivalent to the annual electricity consumption of 900 to 1000 households.

 Will TV reception be affected?

Electromagnetic Interference is unlikely to occur. If it does occur, it can be easily mitigated by installation of a repeater.

 Will the value of my property be affected?

Local and International evidence indicates, that values for properties in close proximity to a wind farm are not adversely affected by the development.

 How much does a wind farm project cost?

In general terms it costs approximately NZ$1.65 million per turbine installed. Therefore, a 20 turbine wind farm the total cost is NZ$33 million.

 How many jobs will be created?

The wind industry in 2001 provided more than 50,000 jobs worldwide. Depending on the size, a wind farm development will create 30 to 50 local jobs during construction and at least 3 to 5 full time permanent jobs for operation and maintenance.

 What effect has a wind farm on electricity prices?

Generally, an increase in generation leads to greater supply which should based upon normal economic theory results in prices, increasing at a slower rate than would have been otherwise the case.

 Power quality / security of supply?

Additional generation should increase the power quality in the area and the security of supply.

 How noisy are the turbines?

Large, modern wind turbines have been designed to be quiet. At distances greater than 200 meters, the swishing sound of rotor blades is usually masked completely by wind noise in the leaves of trees or shrubs. At 500 meters their noise levels will be comparible to a quiet bedroom at night.

 How much space is needed to install a turbine?

Wind turbines and access roads occupy less than three per cent of the area in a typical wind farm. The remaining 97 per cent of the land can be used for farming or grazing, as usual.Thus wind farms result in rural land being used more productively.

 How far apart are turbines spaced ?

In a wind farm, a turbine must generally be spaced between three to seven rotor diameters from any other turbine in order not to effect the operation of another too much. For a 1.75 MW turbine they would be spaced about 200 meters  to 500 meters  apart.

 How is the electricity transported?

On a wind farm site the transmission cable will be buried. Off-site transmission lines will be used to connect the wind farm to the local grid.

 Will there be navigation lights on the turbines?

Navigation lights are only required on structures with a height greater than 110 meters.

 Why are turbines painted white?

There is no evidence to suggest that wind farms detract tourists, indeed many wind farms are themselves tourist attractions with local operators running successful tourist ventures based on the wind farm (for example Tararua Wind Farm, North Island, New Zealand)
White is generally accepted as being the least intrusive colour for a wind turbine. A very light grey is also sometimes used. In either case a special non-reflective paint is used to minimise visual impact.

 What kind of effect on wildlife may occur?

Wind turbines will not have an adverse effect on wildlife in the region. As part of the permitting process extensive studies have or will be undertaken to assess the potential impact of the wind farm on wildlife. Deer and cattle habitually graze under wind turbines, and sheep seek shelter around them. While birds tend to collide with man-made structures such as buildings, they are very rarely affected directly by wind turbines. Falcons are in fact nesting and breeding in cages attached to two Danish wind turbines! Studies from the Netherlands, Denmark, and the US show that the total impact on birds from wind farms is negligible compared to the impact from road traffic.

 How much Greenhouse Gases could be reduced?

A modern 1.75 MW wind turbine in an average location will annually displace approximately 7,000 tonnes of carbon dioxide from other electricity sources, i.e. usually coal fired power stations. This equals the emissions of about 1600 average cars.

 Will there be a public display / information area?

Wind Farm Developments (Australia) Ltd makes provision in proposed developments for a public display area. The location of this display area will be determined in consultation with the local community.

 Does wind farming affect tourism?

There is no evidence to suggest that wind farms detract tourists, indeed many wind farms are themselves tourist attractions with local operators running successful tourist ventures based on the wind farm (for example Tararua Wind Farm, North Island, New Zealand)

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