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Researchers estimate there's potential for 1,800 TW of wind power

Using advanced computer simulations, researchers at Lawrence Livermore National Laboratory and Carnegie Mellon University studied how much power could be feasibly extracted from atmospheric wind and what the effects on climate would be.

Many think that high-altitude wind could offer dramatic cost savings over ground-based wind by tapping into powerful currents like the jet stream.  Indeed the team, led by LLNL researcher Professor Katherine Marvel, found that while surface winds could only theoretically yield 400 terawatts of annual power production, high-altitude winds could yield up to 1,800 terawatts.

That's 100-times the current global power consumption of approximately 18 terawatts.

High-altitude winds could be captured by using gas-filled inflatables (or kites) with turbines mounted on them.  One factor the team did not look at was price.  Price remains an issue for high-altitude wind harvest, as helium -- the most convenient gas for floaters -- is growing scarce.

The current research focused more on the environmental impact.  As wind turbines slow the air travelling over them, as they harvest its mechanical energy, they can have a climate impact.  But the team estimates that if they were well distributed, even at 1,800 terawatts, the impact would only be a 0.1 degree Celsius change in temperatures and a 1 percent change in precipitation.

Simulation climate
Researchers' models indicate that atmospheric wind harvesting may not have a serious adverse impact on the climate. [Image Source: Nature Climate Change]

This indicates that assuming costs can be worked out, high-altitude wind shouldn't have much of an adverse impact on the global climate.  Of course, such models are prone to error, so it's best to take the study with a grain of salt.

The work, funded by the Carnegie Institution of Science, is published [abstract] in the peer-reviewed journal Nature Climate Change.  Ken Caldeira, CMU professor and the paper's senior author, comments [press release], "Looking at the big picture, it is more likely that economic, technological or political factors will determine the growth of wind power around the world, rather than geophysical limitations."

Sources: Nature Climate Change, Eurekalert



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RE: Incomplete study not worth mentioning
By Ringold on 9/11/2012 3:03:32 PM , Rating: 2
FWIW, most Middle East countries plan to invest heavily in civilian nuclear power as a hedge against their fossil energy reserves. I'm aware they have some powerful rivers throughout the region, but I wouldn't call them awash in water, either. Australia's problem I imagine is more political, like the Germans.


RE: Incomplete study not worth mentioning
By johnsmith9875 on 9/11/2012 5:34:41 PM , Rating: 2
Middle eastern nations have plenty of solar power options. I suspect their Nuclear ambitions have little to do with power generation and more to do with offsetting Israel's nuclear dominance in the region.

The Saudis didn't buy 50 Chinese CSS-2 East Wind MRBM's for nothing...


By Ringold on 9/11/2012 11:23:54 PM , Rating: 2
Depends; Turkey buying modern, almost proliferation-proof, commercial reactors probably don't intend it that way.

It's when they want to develop nuclear power from scratch, on their own rather just buying, say, AP1000s or CANDUs, that we need to raise an eyebrow.


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