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By jacquesm 2020-04-2819:26 Every couple of years someone will jump out of nowhere and claim the wind energy sector has it all wrong, the list is very long. Windtree, Makani and many many others that replace simple and sturdy as well as well understood mechanisms with highly variable and fragile ones, usually without having studied the corpses of those that came before and died on the hill of unnecessary complexity. The closest that ever came to realization was the Darrieus rotor project in Canada, that consumed a ton of resources and resulted in the Aeolian (Eole?), a huge (100m, I've seen it up close before they tore it down, most impressive) VAT that ended up running for a couple of hours before its lower main bearing gave up the ghost under the vibrations.
http://www.wind-works.org/cms/typo3temp/pics/EoleCapChat045x...
Wind turbines are hard, and the standard shape that we've settled on was not due to a lack of creative ideas but simply because it is by far the simplest and most robust shape that gets the job done.
Any company pitching some complex alternative should at a minimum mention in their deck the degree to which they have researched the failures in the field of predecessors and what will set them apart.
By donquichotte 2020-04-2813:292 reply I briefly worked for a competitor of Ampyx.
I love the idea, but given that it took decades to scale traditional wind turbines which are much simpler by design to powers in the range of MW, I can't see this happening.
These systems are insanely complex, you need tethers, winches, a drone that flies 24/7 and can safely and autonomously start and land in many weather conditions. It also looks like google gave up on Makani, which had airborne generators.
By jillesvangurp 2020-04-2815:131 reply True, it needs some infrastructure.
But on the other hand, this may be similarly complex/expensive as installing and maintaining a wind turbine on a tower that's 100m high is. These things tend to be pretty complicated and expensive as well. It's all about operational cost vs revenue in the end (and comparing that to other solutions). IMHO wind and solar are still making great leaps currently in cost effectiveness and efficiency. So you'd have to compete with/undercut that. Which is of course a challenge for just about any other form of energy generation currently (particularly anything nuclear of fossil fuel based).
The added advantage of this setup would be that you can land the things during a storm or for maintenance which potentially simplifies e.g. in the field repairs. Also, if they can be small enough that they can be mounted on a truck, deployment might be quicker or you might be able to re-deploy them to other areas. Currently building a new wind mill park is a large investment. Mass production of these things might enable more rapid roll out. So there are some upsides theoretically.
Safety might be a bigger issue. The cables would be a risk for planes and what happens if the cable snaps? Autonomous drones would be able to handle the latter probably (by crashing/landing in some safe spot). Also, lots of moving parts means those parts need more frequent maintenance/replacement. I imagine the stresses on the cable and mounts would be substantial (and proportional to the amount of power generated).
By jacquesm 2020-04-2819:28 It is of an entirely different level of complexity.
By steve76 2020-04-2815:07 Instead of landing, crash through a kinetic recovery system which charges a rail cannon.
Launch a space plane into orbit for the charging of solar cells. Still crash them back into recovery.
The space plane now is just a cannon ball or a cloud of ball shot. Make everything smaller to the scale of molecules.
Cleantechnica had a writer who spent some time taking a closer look at the claims made by companies in this space, a couple of links:
https://cleantechnica.com/2020/02/21/rip-google-makani-perha...
https://cleantechnica.com/2014/02/19/googles-makani-regulato...
By gypsy_boots 2020-04-2818:40 > The only press they ever received was from credulous buzztech sites that just wanted something flashy to grab eyeballs, so they weren’t used to anyone actually being engaged enough intellectually to point out the lack of clothes that they were wearing. I love the way this is written.
