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new type of wind turbine

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CGFxColoneill:
By practically eliminating mechanical resistance and drag, the Honeywell Wind Turbine creates significant energy (2000 kWh/yr in class 3 Winds)

is that a typo? 2000KWh/ year does not seem like very much

its a cool idea anyhow though

LdMorgan:

--- Quote from: Roknrandy on September 19, 2009, 01:35:12 PM ---This looks pretty neat if they can get the cost down I'd grab at least one of these.

http://www.earthtronics.com/honeywell.aspx

--- End quote ---


Yeah--but it's not all really all that hot.

For starters, you can't get more energy out of the wind than the wind has in it. That's fundamental.

A slow wind doesn't have much power in it.

A Class 3 wind has 150 to 200 Watts of power per sq. meter of turbine available. That's all there is, basically.

The Honewell turbine has 2.828 sq. meters of disc, at most, so the absolute maximum it could put out at 100% efficiency is 525.4 Watts continuous, on average, in Class 3 winds.

If it's putting out 2,000 kWhrs per year, it's only putting out 228 Watts continuous--that's not quite enough to fully light up four 60-Watt lightbulbs.

So call it 43% efficient, at best.

The real issue is cost-per-Watt. If it's expensive, it won't fly because people will use the cheapest method per Watt, whatever it is wherever they are.

Efficiency is utterly unimportant.

If you can run something at 2% efficiency and get power for $0.10 per kWhr, that's better than running something else at 99.7% efficiency and getting power for $0.11 per kWhr.

(Of course if you could boost that 2% efficiency, Life Would Be Good!)

I noticed a few of the usual advertising hustles on their website. They kind of dance around direct comparisons with other turbines. "Practically eliminating"  mechanical resistance and drag is pure puffery. All turbines do that. And their turbine cannot create ANY energy--all it can do is capture some--maybe more, maybe less.

Which is also exactly what all other turbines do, too.







“Mark”:
That looks like a brilliant design, actually. Throw some magnets on the blade tip, run your coils in the casing, and party!

It won't scale up too well (material costs), but on a small scale, that's an awesome way to reduce all the gearing friction. Furthermore, the casing around the blades eliminates the wing tip vortexes, allowing the blades to spin with less resistance, and spin faster. That's pretty damned cool.

At top speed, it's doing about 700 RPM. That's blazing for 3 ft blades. Looks like the limitation is the amount of centrifugal force pulling on the blades (I imagine it's aluminum, and that's gotta be close to aluminum's tensile strength).

patrat:
Nice innovation, poor investment. At my local utility rates the payback is 50 years, but the design life is 20 years.

You can argue inflating power costs, but you can also argue the return on a traditional investment of similar dollar value to the turbine.

Steve W:
"Honeywell" has licensed their brand name to this product and it is vaporware.

No units in the field - at least not at the time of a major review a few weeks ago:  http://www.wind-works.org/SmallTurbines/Windtronics760EstimatedGeneration.html


--- Quote ---There are no units in use. One turbine has been "tested" in a wind tunnel. Thus, all claims about the product are projecture.
--- End quote ---

One unit tested in a wind tunnel doesn't make a product, much less a great or even good product.


--- Quote ---There is no substantiation to back up the promoter's claims and the claims themselves are exaggerated.
It is unlikely that this 500 W wind turbine will deliver the performance promised in either Michigan or Ontario.

--- End quote ---

Marketing hype and vaporware, and no field testing.  Even the basic math is questionable.

Where is Myth Busters when you need them?

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