What is Digg?Sponsored by Realtor.com
Top 50 Most Christmassy City Names view!
realtor.com - Put yourself in a holiday mood by reading about these cities and towns with festive names.
27 Comments
- CDoug03, on 06/24/2008, -5/+21This article is complete fluff.
- uptwolait, on 06/24/2008, -1/+14Whether this guy's tech is sound or not, I love how people come out of the woodwork with amazing breakthroughs whenever necessity backs us into corners. Screw what the media says about doomsday scenarios, difficult times brings out the best in human creativity.
- aladrin, on 06/24/2008, -1/+13'Claims'. I wish the media would stop reporting 'claims' and only report actual facts. I'd love it if he managed to make a more efficient turbine, but I won't believe it until he has built it and independent studies have confirmed that it works as he thinks.
- Duositex, on 06/24/2008, -2/+10There are NO pictures of how this device works. Useless post.
- londubh, on 06/24/2008, -1/+7Vertical wind turbines cannot by capture as much energy as horizontal wind turbines. It's physically impossible. At best the most efficient vertical can capture 50% of what a horizontal turbine can. http://en.wikipedia.org/wiki/Wind_turbine VAWT's are good for some applications and can be cost effective, but they are not the most efficient type.
- duke_nate, on 06/24/2008, -3/+7+1 for the use of "Leviathan" in their name. FarScape FTW!
- ozziedog, on 06/24/2008, -1/+5That Israel gets only 1% of its energy from renewable is completely stupid. If there was one country in the world who could benefit from not using oil it would be Israel. Germany has left Israel in the dust on solar and they don't have the sunlight Israel does. Israel has the expertise and national will to lead the world in alternative energy if they put their mind to it.
- jfreeman, on 06/24/2008, -1/+5"I've had great help, wonderful engineers. We've assembled a wonderful team of Anglo olim and native Israelis."
What do these qualities have to do with engineering talent? - GrandmasterB, on 06/24/2008, -0/+3The article would be much better with some sort of diagram on how it works. The amount of sustainable energy news coming out now is staggering.
- Steinr, on 06/24/2008, -0/+3it is funny how an article would be so much more believeable if it has a few actual pictures. I guess we need to see it to believe it.
- L0C0loco, on 06/24/2008, -1/+4The orientation of the axis makes no difference in terms of achievable efficiency. Case in point is the Darrieus (aka egg beater) which is just as efficient as a HAWT.
- Sheri123, on 06/24/2008, -1/+4Interesting, I would like to see the specs and cost when it goes into production.
- jimmys66, on 06/24/2008, -1/+3Wind, Solar, Water, Tides, we need to it all.
Five Steps
•Ending tax breaks for oil companies and imposing a windfall profits tax on their earnings.
•Switching from fossil fuels to biofuels.
•Raising the federal fuel economy standard to 50 miles per gallon by 2020.
•Protecting the country's strategic oil reserve by not drilling in the Arctic National Wildlife Refuge.
•Allowing each coastal state to decide whether to permit offshore oil drilling.
http://www.z-car.com/frm - dougmc, on 06/24/2008, -0/+2Indeed. Also, power output from a wind turbine/mill/generator is generally proportional to the wind speed cubed, so while it's nice if the turbine starts working at 2 m/s rather than 3 m/s, but all else being equal, the turbine that's working at 4 m/s is going to make more power than one at 2 m/s plus one at 3 m/s. (Granted, it's unlikely that all else will be equal.)
In short, it's nice that the turbine works at lower speeds, but it's what happens at higher wind speeds that really matters. It would be a waste of money to deploy turbines in places where the wind was always only 2 m/s -- go find a place where the wind averages 5-10 m/s instead. - dougmc, on 06/24/2008, -0/+2But there is a picture of the turbine itself, sort of. It sort of looks like a pair of vertical axis wind turbines, but perhaps he's done something differently. Assuming I'm right, you can read about them at --
http://en.wikipedia.org/wiki/Wind_turbine#Vertical ...
It's likely that whatever changes he's made are evolutionary rather than revolutionary, so what's likely is that he's just refined the design somewhat to make it less draggy, perhaps only at lower speeds. Who knows? More details would be nice. - bokep, on 06/24/2008, -0/+2You're forgetting the word "axis". Without it your whole post makes no sense.
- proliance, on 06/24/2008, -3/+5Wind turbines in the desert?
Bah, just a lot of hot air. - sanosuke001, on 06/24/2008, -0/+2...or maybe a biblical sea creature
http://en.wikipedia.org/wiki/Leviathan - lostlyrics, on 06/24/2008, -0/+1with ONE blade are the most
efficient horizontal ones. (late 80s,
germany) the 'nod' mechanism to even
the excentrics, is complicated, though ... - inactive, on 06/25/2008, -0/+1Nobody has noticed or commented on this;
http://digg.com/general_sciences/Helical_wind_turb ...
Is this a vertical wind turbine? Is it any good?
Where are they? - L0C0loco, on 06/24/2008, -1/+2I agree that this is mostly fluff. It is claimed to be "most efficient IN ITS CLASS" and the arbitrary definition of efficiency is the cut in speed. This is pure marketing hype.
- lostlyrics, on 06/24/2008, -0/+1who was female - so let us hope
the turbine does not need too
many different oils ... heheheh ! - charlietuna, on 06/24/2008, -0/+1So it's a superior pinwheel?
- cushyb, on 06/24/2008, -1/+1If the above turbine was twice as large the cut in speed would be far greater... it's all dependent on the size and weight of the turbine at hand.
Oy Windside of Finland has a vertical-axis turbine w/ a 1.5 m/s cut in! and these look a lot better too.
http://www.windside.com/
http://www.raigattaenergy.com/products.php?pid=70 - nick111, on 06/24/2008, -1/+1Maybe you need the doomsday scenarios to convince us that necessity has backed us into a corner?
- engityra, on 06/24/2008, -1/+1Agreed. I just finished a course in renewable energy; horizontal axis wind turbines with three blades are the most efficient. One of the main reason vertical axis turbines are not as good because they are so low to the ground where there isn't as much wind.
- 1dog, on 06/24/2008, -4/+1The guy must be a blow hard.
© Digg Inc. 2009
— Content created and posted by Digg users is