Helix Wind – Turbine Testing
This is a video by Helix Wind of one of our independent, 3rd party validated performance tests. http://www.helixwind.com/ Thanks to Chad Benton for the music, to hear more of his work please visit www.awomansworkmovie.com
Duration : 0:5:10
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August 27, 2009
10:17 am
There have been …
There have been lots of attempts to create shielded VAWT but they lose most of the advantages of a VAWT. The shield has to have a yaw control, etc so you no longer capitalize on the variable wind direction. They do increase efficiency but at the cost of response time and CoGS.
August 27, 2009
10:17 am
Efficiency is only …
Efficiency is only part of the equation. Capacity factor is the other important part. Most HAWTs are inherently more efficient than VAWTs, but when it comes to utilizing the available wind resource over the course of a year to generate electricity, they end up producing less b/c they have many operating limitations. The ONLY metric that really matters is $/kWhr generated. On that variable, for target applications for this technology, Helix is highly competitive.
August 27, 2009
10:17 am
Twoddle. ‘Shielded …
Twoddle. ‘Shielded’ VAWTs or, to be more precise, those with ‘leading edge reorientation flap’ are showing much more efficiency, either in tunnels or outside, and by a huge %. Admittedly that % still being determined, and by only a tiny few, but what I cannot understand is why it takes so long in this IT age for the best to kill the rest. Human stubbornness one supposes. This helix thing is pretty, but pretty powerless and I suspect that the site is a hopeful advertisement. .
August 27, 2009
10:17 am
You could, many off …
You could, many off grid applications are done this way, but most customers elect to have it connected to the grid and net their usage on an annual basis. If you are on a time of use meter then, depending on your rates, a battery system to peak shave can make sense.
August 27, 2009
10:17 am
It is one of the …
It is one of the quietest wind turbines available because the tip speed of the blades is less than the wind speed. It is also much safer than typical turbines because it turns at lower rpms and doesn’t shed ice long distances but rather downward in a limited radius.
August 27, 2009
10:17 am
Battery systems for …
Battery systems for storage are a separate component and not included with the system, and the platform does have a brake so that if winds in excess of 150mph are anticipated it can be shut down.
August 27, 2009
10:17 am
This data varies by …
This data varies by model and is available on the Product page on the website.
August 27, 2009
10:17 am
They could be, but …
They could be, but the square footage and subsequent output you could devote to the solar panels wouldn’t be worth the cost.
August 27, 2009
10:17 am
A good question. …
A good question. First, a ducted VAWT only generates more output in wind tunnel tests, not in the real world where the wind changes direction, and if you consider the additional swept area created by the duct as part of the turbine, then you’re really not seeing an efficiency improvement, only a swept area increase. Second, the key challenge with the Savonious is to make it durable, efficient, reliable and cost effective. That’s where all the development $ has gone.
August 27, 2009
10:17 am
This is indeed the …
This is indeed the minimum speed required for it to start turning, however that’s not the same as to produce power. Most small wind manufacturers will issue confusing statistics which can be misleading to customers. Cut in speed does not equal starting production speed. You really need about 7m/s average annual wind speed for ANY small wind turbine to generate significant output.
August 27, 2009
10:17 am
That’s a great …
That’s a great question, and the first one most people ask. Unfortunately, the answer is not so simple. The typical American home uses about 10,000 kWhr/yr. In a good Class 3 wind regime (7m/s average) the turbine in this video will output about 3,650 kWhr or about 36% of total household load. That being said, more wind, more power. Less usage by the home, a higher % supplied.
August 27, 2009
10:17 am
Annual energy …
Annual energy output (AEO) at different wind speeds is available on the cut sheets for each model posted on the website. The test in the video above was under load and was used to determine initial efficiency. Subsequent to this extensive field testing was conducted to validate efficiency and output under real field conditions in a Class 7 wind regime in California. The AEO figures represent the confirmed output under real world conditions.
August 27, 2009
10:17 am
This requires some …
This requires some clarification. The concrete foundation can take from a few days to a month to fully set depending on the size. The actual embly and installation of the turbine can be done in as little as 1/2 a day, 2 days maximum.
August 27, 2009
10:17 am
The Savonious …
The Savonious platform is designed to withstand sustained winds up to 100mph and gusts up to 150mph, it’s one of the design characteristics that distinguishes it from most other platforms. Since the power in the wind is a cubic function, the ability to continue generating electricity at very high wind speeds during seasonal storms can generate enormous additional power on an annual basis. Most propeller style turbines have to shut down around 35 or 40mph.
August 27, 2009
10:17 am
Actually I’m …
Actually I’m looking at the company specs for the thing and it says “No braking for normal operation”
so I wonder if it’s heavily resistant to large wind gusts and breaking apart?
August 27, 2009
10:17 am
That’s truly …
That’s truly amazing! I slashed my electric bill in half! look here: solar.xfollow.me (Copy to your browser’s address bar)
August 27, 2009
10:17 am
To be honest, one …
To be honest, one week is too long. Installing it within 5 hours would make sense.
August 27, 2009
10:17 am
Can you provide the …
Can you provide the dimensions of the wind turbine, power vs. wind speed data? I bet the efficiency shouldn’t be very high. Also, this kind of no load test means nothing except that the wind turbine can turn.
August 27, 2009
10:17 am
brilliant video how …
brilliant video how many houses would this size turbine power and what size would i need to power a typical house ,
August 27, 2009
10:17 am
For the S322, I see …
For the S322, I see that the Cut-in Speed is 3.6 m/s (8 mph). Is this the minimum windspeed required for the turbine to start turning?
August 27, 2009
10:17 am
Why spend so much …
Why spend so much money on the development of a simple open Savonius (VAWT) when it’s already well established that a screened or ducted VAWT is considerably more efficient?
August 27, 2009
10:17 am
Could these be …
Could these be fitted with a flexible solar panel around them as to even further increase efficiency without sacrificing space?
August 27, 2009
10:17 am
dude that is so …
dude that is so awesome.
August 27, 2009
10:17 am
How many watts does …
How many watts does this shot out? and what min. speeds? 5 to 12 mph?
August 27, 2009
10:17 am
stores energy, i …
stores energy, i ume the turbine has some batteries in it
and it should have breakes so the thing doesn’t fly apart.