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FAQ

1. Are wind turbines noisy?
 
Wind turbines are not noisy. The technological development in the past years has succeeded in reducing mechanical noises to an almost imperceptible level. The main sound that can be heard near an operating turbine is the one produced by the aerodynamic profile of the blades the moment they pass by the tower.

The noise level generated by the contemporary wind turbines is around 90-100 dB, and by respecting the minimum distances to the inhabited areas, any disturbing effect is entirely eliminated.

A truck driving along the highway at 60 km/h produces a much stronger noise than an operating turbine.

2. Do wind turbines cause environmental damages?

Wind turbines do not cause environmental damages. A slight interference is present during the construction period, which starts with the first excavation and ends with the start-up of the turbine, i.e. approximately 2 months for each turbine in turn.


Wind turbines reduce pollution as they use a clean and renewable source - wind power - thus succeeding in partially replacing classical sources, which burn hydrocarbons or coal, known as major environmental polluters.

Wind turbines do not need any kind of raw materials that generate waste. The packages of the maintenance products (2 times /year) and the used oil (changed once every few years) are the only produced waste, which is recycled accordingly.


3. Do wind turbines scare animals?

No, they don’t. Building wind turbines on agricultural land is a very popular solution. Farmers can carry on with their agricultural activities since the turbines cover a very small area of land. The cows, sheep and other domestic animals are not disturbed by the presence of the wind turbines.

4. Do wind turbines affect the birds in the area?

Lots of discussions exist in this respect. However, the large number of research studies has demonstrated that this idea is supported only by those who have not studied this aspect well enough. Wind turbines are usually placed outside the strictly protected areas, and the birds in the area avoid them instinctively. There are only a few cases in which birds collided with the blades of the rotor and they mostly involved sick birds.

A far larger number of birds are killed every year because of traffic accidents and hunting. There are situations in which birds build their nests near or even in the wind turbine, if there are access spaces.

5. Do wind turbines affect tourism?

There is no evidence in this respect.
On the contrary, the areas with wind turbines have attracted a larger number of visitors. Accommodation and food facilities have also registered an increased number of clients due to visitors and to the staff involved in the respective projects.

6. Do wind turbines affect wild life on and in the soil?

Wild life can be temporarily affected throughout the construction period, because of excavations and heavy traffic, however after this period the location is returned to the natural habitat.

7. How much land do wind turbines need?

A wind farm consisting of 10 turbines with a capacity of 2 MW each, for instance, spreads over a surface of approx. 100 ha. The actual constructions, the access roads and the electrical equipment cover at most 1% of the 100 hectares.

8. What is the operating life of a wind turbine?

Most manufacturers indicate a minimum operating life of approx. 20-25 years.

9. What is the cost of wind energy?

In order to get a clear picture one needs to take into account the initial investment, the operating life, and the maintenance and operation costs. Wind energy is the cheapest one of all renewable energies, having the lowest environmental impact.

In terms of costs, the energy produced by modern wind turbines is similar to the one generated by new ecological coal-fired power plants and lower than solar, hydro- or nuclear energy. For the latter, one must not overlook the danger of nuclear accidents having devastating effects upon our environment and the living organisms.

10. What is the pay-off period for an investment in wind turbines?

It depends on the wind potential of the selected area. The pay-off period for new turbines can vary between 8 and 15 years.

11. How many wind turbines are there in Romania?

In June 2008 there were about 30 wind turbines with a total capacity under 10 MWh. Under the Kyoto protocol, Romania commits itself to obtain 20% of the consumed energy out of renewable sources no later than 2020. This means that we should have some thousands MWh installed in renewable sources such as wind, solar, geothermal and biomass energy, etc.

 

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