this post was submitted on 25 Sep 2025
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'Windmill': China tests world’s first megawatt-level airship to capture high winds (interestingengineering.com)
submitted 3 days ago by kalkulat@lemmy.world to c/technology@lemmy.world
26 comments fedilink hide all child comments
 

"High-altitude winds between 1,640 and 3,281 feet (500 and 10,000 meters) above the ground are stronger and steadier than surface winds. These winds are abundant, widely available, and carbon-free.

"The physics of wind power makes this resource extremely valuable. “When wind speed doubles, the energy it carries increases eightfold, triple the speed, and you have 27 times the energy,” explained Gong Zeqi "

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[–] humanspiral@lemmy.ca 4 points 2 days ago (1 children)

H2 being 10% more lift while 500% cheaper still makes it the choice. A H2 economy is the path to 100% renewable energy, with a transportable fuel that in a fuel cell is also much more efficient than combustion engines/turbines. Lifting gas, chemicals, agriculture, rocket fuel, all of the existing uses for H2 is just icing on the cake.

[–] 5too@lemmy.world 1 points 1 day ago

True, I hadn't considered the economic angle at all!