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far911
User Rank
Silver
Re: Aircraft
far911   4/2/2014 1:43:29 AM
NO RATINGS
Certainly we can arrange for an other source of energy but subject to the output as per input has to be higher other wise whats the point of going into a field which is not worth it.

William K.
User Rank
Platinum
Re: Helium-Filled Wind Turbine article
William K.   4/1/2014 6:54:17 PM
NO RATINGS
J.D. Right on most counts, but the more stable and constant wind is often a lot higher than 500 feet. So the airborne generating system will indeed need to go much higher. But presently there are no-fly zones and aviation gets along with that quite well. In addition, putting them up at 2000 feet or maybe 2500 will keep that noise that people complain about away. I approached a large windmill a while back and could not hear any sound at about a hundred yards, so I do wonder what the folks are hearing.  Plus they will be a bit more out of sight so that people won't be looking at them, and probably higher than most birds fly, which should reduce the bird impacts.  So a lighter and much larger airborn system, like was described a year back, or so, is indeed probably a better choice. BUT now for a temporary emergency generating system the one in the writeup might be good. AND yes, use hydrogen instead of helium. When thye helium is gone there isn't any more. It's GONE.

Jerry dycus
User Rank
Gold
Re: Helium-Filled Wind Turbine article
Jerry dycus   4/1/2014 6:30:47 PM
NO RATINGS
While the basic concept is doable, this particular one won't be among them.

It uses far too much material in the duct and far too much air drag plus complicated when a lighter, more simple style will work much better, cost less with more output and stay up in higher winds.

The aircraft problem if these become popular will likely get then banned over 500-100' but that's still good.  The FAA controls airspace and can even block high buildings in the wrong places, etc.

What won't work is using helium as too costly, rare  and not enough lift causing the body to be larger than needed compared to H2 lifting gas. No fire isn't a problem.

But many places are going to not be plesed this big set of rotating blades above them limiting where it can be used.

I for yr watched the Key's Fat Albert Radar bolloons and they had all kinds of problems which my above better or others aero body helps solve.  They ended up being up less than 10% of the time.

I'd do a flying wing with several rotors on the trailing edge or a streamline bag with rotors around the sides.

Trenth
User Rank
Gold
Re: Helium-Filled Wind Turbine article
Trenth   4/1/2014 4:35:28 PM
NO RATINGS
Might be great for cargo ships, or military ships.   

William K.
User Rank
Platinum
Re: Helium-Filled Wind Turbine article
William K.   4/1/2014 3:08:00 PM
NO RATINGS
Quite a concept, I wonder about how frequect the helium refills will be needed, though. And just like that flying gereator platform that we read about a year ago, bringing power down to the ground is a challenge. To keep the conductors light the voltage goes up, which then dmands separated conductors, and now there is a challenge of keeping them separate. I wonder how the other project is working, and it will  be very interesting to see if this project scales up nicely.

beentheredonethat
User Rank
Iron
Helium-Filled Wind Turbine article
beentheredonethat   4/1/2014 2:32:23 PM
NO RATINGS
Interesting article...This prototype is designed for 30 kW of generation.  Will the final product be larger?  The cost per kWh might be prohibitive at this size?

Another commenter mentions, "which captures much energy [as] than the ones we already have".  I do not know where he got this information since I could not find it in the article.  Commercial wind turbines in service by utilities produce about 1.3 MW each, or about 43 times as much.

I assume High-Altitude winds remain uni-directional for the most part.  Turning and controlling for changing directions, if needed, might be a challenge using long tethers.

I'll be interested to learn more about this project...

tekochip
User Rank
Platinum
Re: Aircraft
tekochip   4/1/2014 9:54:25 AM
NO RATINGS
No kidding 78RPM, 2000' AGL is a pretty good cruising altitude for General Aviation.  The balloon would be easy enough to see and avoid in VFR conditions, but the wing-shredding guy wires would be rather frightening, after all, how far would it drift?  There was a recent accident where a helicopter was clear of a tower, but clipped a guy wire killing all on board.  There aren't too many places with towers that tall, but I always give them a very wide berth.  I refer to them as "friendly towers" because they just want to reach up and give your aircraft a big hug.


Elizabeth M
User Rank
Blogger
Re: The new direction in turbines is up
Elizabeth M   4/1/2014 6:59:43 AM
NO RATINGS
These are great questions, NadineJ. I don't have answers to them at the moment but the company plans to stay in touch with me as they test and have other news to share. This is definitely a great idea with lots of potential, but there is still a lot to be proven here to see if this will really work.

shehan
User Rank
Gold
Re: The new direction in turbines is up
shehan   3/31/2014 10:06:03 PM
NO RATINGS
@NadineJ – when we have more vendors I am sure the prices will come down soon. 

shehan
User Rank
Gold
Re: The new direction in turbines is up
shehan   3/31/2014 10:04:53 PM
NO RATINGS
@NadineJ- a good way of saying it "all clean sources are more expensive than dirty". This might defiantly cost more as we are talking about a floating turbine. 

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