Australia, May 2010, in Gull Range wind farm in New South Wales, were approved Epuron 73 wind turbines on the condition that 14 owners of these lands will be compensated.

The case had focused on complaints about the visual impact of “shadow flicker”, generated by the rotation of the blades of wind turbines and the scope.

According Epuron page, based on a design of 84 turbines, the windfarm Range Gullan could provide clean energy and renewable for a maximum average of 73,500 homes and reduce greenhouse gas emissions to 588,000 tonnes (CO2 equivalents) per year .

Although wind power has the ability to cool global warming continues to be widely used because of opposition by citizens to be directly affected by the risks posed by facilities.

Dr. Mark Diesendorf, an expert on renewable energies and author of “Greenhouse Solutions with Sustainable Energy, believes that coal and nuclear energy industries are expanding due to the bad press that is done on wind energy He added: “The local anti-wind groups inspired by his own propaganda.”

Floating Problems

Last year, the world wind energy capacity grew by almost a third in the United States, ahead of Asia and Europe in terms of installed capacity. According to Windpower, an annual event of American industry, the fleet of the nation’s wind power grew by 39 percent in 2009 which is equivalent to taking 10.5 million cars off the road.

However, the intermittent nature of wind daily and seasonal variations in demand for electricity, for example due to heating in winter, require a reserve to cover short-term supply and demand.

Denmark avoids this by using hydroelectric facilities in other countries for storage of surplus and then when you are able to buy a lower price during the period of low wind and high demand.

Diesendorf from Australia, said that a reserve of energy would be through new transmission connections, for example, from south to east, followed by gas turbines, hydraulic pumping, “flow batteries” and possibly energy storage air compressed (CAES), if the natural caves are available to store excess electricity.

Other problems

With a typical windmill 30 meters in diameter, it is impossible not to alter the aesthetics of a natural landscape, as the turbines need to be close to local electricity networks, where transmission units are remote drive up the cost of electricity.

Combined with other issues such as noise generated by “whistling” turbine blades and gearboxes in the mill and the “wind turbine syndrome” (which generate lack of sleep and health problems), wind energy has to deal with inertia of rejection in many communities.

Even some conservationists are against wind power because the number of birds and bats allegedly killed by wind farms. For example, the Royal Society for the Protection of Birds (RSPB) reported that nine white-tailed eagles were killed by wind turbines on the island of Smola, against Norway during a period of 10 months in 2006, including all chicks last year with young couples.

Diesendorf explains, only two or three of thousands of farms actually have this problem due to bad locations, noting that the grid, cars, cats and birds are murderers of much larger and added that the chimneys of thermal power plants Coal was also killed in large numbers. Acknowledges that the visual impact is inevitable, although it is also a “matter of taste”, while noise pollution is a problem.

The turbines require large tracts of land to prevent the formation of shadows in the wind, and experts say, can not be separated in less than five times the diameter, without loss of power.

Offshore turbines than the issue of land use, with higher wind speeds and more consistent in the sea, but the impacts on marine systems remains a concern over high costs due to longer lines transmission, increasing the ocean depths and corrosion of vessels of special maintenance.

Floating wind turbines are now in the demonstration phase using oil platform technology with the ability to take advantage of even higher winds offshore.

Economy

Diesendorf says comparing nuclear energy with wind power, the latter now is much cheaper “if you look at the total capital and operating costs … and prices are falling.”

Once established, wind power has lower operating costs. “In Europe, this is reducing the cost of electricity for consumers.” Furthermore, “tens of thousands of people are employed by the wind industry and its component manufacturers despite the global financial crisis.”

As solar energy, wind has smaller modules and can be installed when necessary and it is less risky for investors.

Combined with incentives such as subsidies and tax credits, wind power is taking off at suitable locations around the world, despite the perceived disadvantages.

Diesendorf believes that good government policies and “20 to 25 percent live” of these resources incentive for the component of total wind power generating electricity in Australia, combined with other renewable energies such as solar and bio- electricity could reduce dependence on “dirty coal” and CO2 emissions.

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