This is a most excellent place for technology news and articles.
I like how everyone conveniently leaves out the part that this is an emergency backup not actual full time scalable tool.
1,640 and 3,281 feet (500 and 10,000 meters)
I feel like this needs a second look.
As a European... Are feet logarithmic? Wouldn't even surprise me that much.
The zero key got stuck.
Ha! Watch us burn some liquid dinosaurs!
- USA
Fossil fuels are from shit the dinos ate, like plants and other dumb crap. The belief that coal-rollers are cool enough to burn liquid dinosaurs is easily the single biggest lie of the oil industry.
Closely followed by -gestures wildly-
Lol, got your new advert campaign... Gasoline is vegan
Want to eat it?
I mean some small part of it is dino. But yeah by biomass it's mostly plant.
Fun fact , oil is mostly from carboniferous period , so its alot older than dinos ... few hunder million years older
And Africa, and South America, and the middle east, and Europe. Don't pretend the rest of the world isn't still burning fossil fuels it's not just the US
I cant wait for the conspiracy theories about this
Finally the stupid floating jet engine looking turbines from Big Hero 6, except IRL they actually look good.
When wind speed doubles, the energy it carries increases eightfold,
Edit: I'm wrong, see edit below!
Huh? Kinetic energy increase is square, not cubic.
KE=1/2 m v^2
So every doubling of speed should increase the available kinetic energy by 4 times, not 8. 3 times the speed is 9 times the energy. Granted there are probably some efficiency gains in excess of this at the low end, ~~but as a rule that's just wrong.~~
Edit: Cool, I learned something new! I neglected to consider it in terms of power, just thought about kinetic energy.
So something like: KE = 1/2 m v^2
= 1/2 ( rho V) v^2
= 1/2 ( rho A d) (d/t)^2
= 1/2 rho A d^3 1/t^2
Where P = KE/t
Thus:
P = 1/2 rho A (d/t)^3
= 1/2 rho A v^3
Lots of other aspects I'm sure I have wrong, but I see how the cubic came to be.
Its cubic actually
https://thundersaidenergy.com/downloads/wind-power-impacts-of-larger-turbines/
I don't understand the physics, but every model of power output from wind turbines uses V^3 for the formula
That's a good link.
During the stampede scene in the Lion King, imagine the wildebeests were stampeding twice as fast. Then Simba's dad Mufasa would not only have quadruple the amount of energy imparted by each wildebeest, but also be trampled by twice as many wildebeests per second, so the rate of energy imparted on Mufasa per second would be 4 x 2 = 8 times greater when velocity doubles.
Thanks for the correction! I got way ahead of myself.
Increasing the speed increases both the kinetic energy of the wind hitting the turbines and the amount of wind that hits the turbines each second.
We don't directly harvest the kinetic energy. That increase probably has to do with how the wind provides lift to the blades. Of course, you couldn't keep increasing like that until the harvested energy is greater than the kinetic energy. But I'm sure at any wind speed we only get a tiny fraction.
Kinetic energy is exactly what’s harvested, which is why modern wind turbines are not far off the theoretical limit of the amount of energy that can be extracted. (Betz’s law)
By taking energy from wind, you slow it down. Slow it down too much, and it can’t get out of the way in time for new air.
This is totally breaking loose and heading toward the nearest city in the final act.
With a traditional wind turbine, if the wind speeds get too high, the turbine locks the rotation and feathers the blades. For the airship however, people will have to manually take it down and later erect it again. Hopefully they get to it in time, otherwise it's going to violently take itself down and/or fly off. Either way, that is a bunch of extra cost incurred on a regular basis.
Strikes me as an impractical solution.
Article says wind speeds are môre steady up there, wouldn't that mean whatever you put up there is build to withstand those winds?
500 to 1,000 meters AGL is going to be a problem for aircrafts. You need remote areas to have no interference bc these are big balloons.
