Published: 23 December 2013 at. 10:26
If it were possible to build a wall with tens of thousands of wind turbines off some of the U.S. cities that are most vulnerable to extreme weather, cities would experience lower wind speeds and less severe storm surges caused by hurricanes coming.
claim the American professor of civil and environmental engineering, Mark Z. Jacobson and his team at Stanford University.
Simulated
In a study, not yet published, the research team has simulated what would happen if 70,000 wind turbines with an installed capacity of 300 gigawatts was set up just under 100 kilometers from the country before hurricanes Katrina and Sandy struck.
Hurricane Katrina that devastated New Orleans and the Louisiana Gulf Coast in 2005, was the costliest and one of the deadliest hurricanes that have hit the United States, with 1,833 fatalities. In 2012, Hurricane Sandy killed 286 people in seven countries, and successor Katrina as America’s second most expensive hurricane ever.
research team ran computer simulations of both hurricanes, both with and without installed turbines off some of America’s most vulnerable areas. The turbines were in the study designed to withstand wind speeds up to 50 m / s, slightly stronger than the wind speed of a category 3 hurricane.
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Halved wind speed
According to an article by researcher and journalist organization study concluded that the wall of wind turbines would tapped Hurricane Katrina with so much energy that the wind speed was reduced by 50 percent as she hit the country. The storm surge could be reduced by about 72 percent .
Wind speed would have been reduced enough that the wind turbines survived the storm, while those generated enormous amounts of wind power.
A similar simulation of Hurricane Sandy, where a wall of wind turbines are located outside of New York and New Jersey, to show that the air force would have been reduced by up to 29 m / s and storm surges were reduced by 21 percent.
Although the study is not yet published, the findings are already known in a number of U.S. media.
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Will not elaborate
reason is that a journalist researcher and journalist organization Climate Central was present when Jacobson presented the findings at the annual gathering of geophysicists under the auspices of the American Geophysical Union in San Francisco in early December. The journalist wrote an article based on the presentation, which was then published on Climate Central’s website.
Tech Magazine has asked Jacobson elaborate on the allegations and present conditions of the study. The professor will not yet answer some of the questions.
– The study is still under consideration by another journal, and I’m not allowed to go out with information about the study before it is cleared and it is sent out an official press release. I just gave a presentation for the American Geophysical Union, writes Professor Jacobson by email.
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Can not produce hurricane
Carl Sixtensson, a senior advisor in renewable energy in DNV GL, do not see the point of that wind power can protect populations in vulnerable areas against damage caused by extreme weather.
– The point that offshore wind turbines could have slowed hurricanes are quite uninteresting. Personally, I think this is not a serious argument for why to build wind power. These assessments should also revolve around energy, security of supply and predictability. The question is therefore quite irrelevant, says Sixtensson.
– Can regular havvindkraftverk resist the forces of a hurricane?
– Man builds generally do not wind parks where one would expect a plethora of tornadoes. I’m not expert in this, but a turbine which is certified according to IEC class 1A is designed to withstand against winds of 50 m / s We believe that their liquid havvindturbin Hywind is designed to withstand typhoons in Japan (similar to hurricane strength, eds. Anm), says Sixtensson.
Using the intense air forces of a hurricane to produce electricity while the storm is in progress, is also a well sweeping assertion. Many wind turbines automatically shut down when the wind speed is too high.
– A typical wind turbine is shut down when when the wind reaches 25 m / s, says Sixtensson.
Jacobson has published numerous studies related to wind power, including a study from 2012 showed that a third of U.S. energy needs could be met by offshore wind power.
Extremely: Hurricane Sandy was the second most devastating and costly hurricane in U.S. history, Hurricane Katrina. Illustration: NASA
See also:
This shark and rough seas stop the world’s biggest wind farm
97 huge wind turbines of 6 MW set up outside Germany
This offshore wind farm could become 33 percent more efficient
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