Your Questions About Wind Turbine Generators Types
Donald asks…
what are different types of wind generators?
i am looking forward all kinds of generators which can be used in wind turbine(wind farms).
i search about real types and industrial of generators, not mankinds or labratoars ones.
thank you
admin answers:
Induction generators are used for stand alone systems, synchrounous generators could be used as well.
Susan asks…
How would you calculate the theoretical power output of a Savonius wind turbine?
I built a small scale Savonius style wind turbine for a project. I can easily measure the power it puts out in a wind tunnel using a wattmeter, but how would I calculate the theoretical maximum power output? I want to use these two values to find the turbine‘s efficiency. Thanks!
admin answers:
Hey Drew, Gatorbait is on the right track, but the formulas in Mr. Voneshen’s publication cannot be used for a savonius turbine.
First, the actual formula originally derived by Albert Betz was this:
P = .5 X rho X A X V^3
P is power in watts
rho is the air density in kg / cubic meter
A is the swept area in square meters
V is the velocity in m/s, which is cubed to get the final power.
This is the actual formula to find theoretical power available in a moving column of air. There are lots of hybrid formulas, such as the one Gatorbait references. Mr. Voneschen’s instructions use one that takes air density at sea level times one half, then converts it to a constant to adjust for the fact that he is using Diameter instead of swept Area. That’s fine, as long as you are using a horizontal turbine. With a vertical, or savonius, the diameter means nothing, because the area can be changed dramatically with a taller or shorter barrel. It is the area of the rotor that the wind sees that must be used for power calculations. Once Mr. Voneschen finishes his discussion, showing a diagram of a horizontal turbine, he then goes on to show you how to build a vertical one, so the hybrid formula no longer applies.
The other problem is the efficiency he is using. The best modern turbines that science can build today run in the 25 to 35 % efficiency range, and they are all horizontal. Albert Betz correctly calculated that the best ideal efficiency any turbine could ever reach is a theoretical limit of 59%. The horizontal types have horrible efficiencies, generally in the 5 to 8 % range. The reason for this is that most of the torque developed by the downwind blade is used to push the upwind blade back into positon, so very little is left to actually push the generator. It is this reason that no commercial applications of these devices are built today. I think Savonius rotors are neat, as do most of creation, but besides turning a wind chime in the garden, or running a small pond pump, they can’t really do anything for us. In Mr. Voneschen’s instructions, he is using 50% as the “rough” efficiency of the home made barrel rotor. Even the very best horizontal units today do not come close to this level of efficiency, a good quality well engineered savonius rotor won’t be within one tenth of this level.
We’ve been powering our home for 11 years now with the wind and sun, and the last 5 years or so I’ve been teaching renewable energy seminars in the local schools. In my experience, there are two things in vast supply when you get into wind power, wind, and missinformation. My suggestion is to go to the source and don’t waste your time asking questions to hacks like me online. When your turbine is finished, if you can get it to run well in a wind tunnel, get some good watt readings, then go to the American Wind Energy Associations website and do your calculations for theoretical power available, and it will be simple math to come up with your efficiency. Don’t be dissapointed by the results, if you can reach 3 or 4 %, you’re doing really well. Take care Drew, Rudydoo
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qs_88418_10 Danita Delimont – Energy – Palm Springs, energy wind turbines, California – US05 IST0012 – Inti St. Clair – Quilt Squares – 25×25 inch quilt square
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ALEKO® WG450A 450 Watt 12 Volt Residential Wind Turbine Generator
 | ALEKO WG450A 450 Watt generator is 12 volt model. Fresh 2013 Version just shipped from the factory. This is the latest design with 5 blades. This item is new in the factory unopened box. Comes with instruction manual and all warranty information (1 year warranty from the purchase date). | |
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Your Questions About Wind Generators For Sale
Sandra asks…
What type of power inverter should I get for home use?
I would like to have a power source I can use when the power goes out for a couple of hours. I would just want to use a lamp, a cable modem, maybe a fan. Nothing which would draw a lot. I am looking for an alternative to a gas-powered generator. Are there power inverters available that you can keep plugged in so a battery stays charged? And when the power goes out, you pull it out and use it. It would need to have a standard outlet you can plug into. I do not want a power inverter that plugs into the car cigarette lighter. I think I saw such a device at Staples, but I’m having a hard time finding devices for sale on the internet.
admin answers:
A UPS would do what you want and would automatically switch online so you wouldn’t lose power to the devices. Check the manufacturers specs for run time at various loads to help determine which size would work best.
I have a pair of very large storage batteries which are kept charged with a 28VDC power supply. They power a 1kW sine wave inverter which powers the outlets in my bedroom. During a power outage there is no change to whatever is plugged in. I can watch TV, clock radios do not start flashing. In the event of the batteries draining, the circuit will automatically revert back to normal AC power.
There are some pictures and other information on my web page.
Http://members.rennlist.org/warren/wind.html
Susan asks…
Detailed information on the Hush wind generator?
It is an Australian invention and should be released for sale soon.
admin answers:
Haven’t heard about it, but sounds like I would want one.
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GudCraft 900W 900 Watt 24 Volt Wind Turbine Residential Wind Generator
 | GudCraft 900W Wind Generator is 900W 24 volt model with 3 blades. Fresh 2012 version just shipped from the factory. This is the latest design model. This item is new in the factory unopened box. Comes with instruction manual and 1-year warranty from purchase date. | |
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LEGO City Limited Edition Set #7747 Wind Turbine Transport
 | Transport and build a spinning wind turbine! LEGO® City is going wind-powered! Transport the wind turbines blades and motor on the trucks trailer, then extend it to carry the entire tower to the building site with the help of an escort vehicle to guide you through traffic. Put it all together and let the citys new wind turbine spin! # Contains extendable truck that fits the wind turbine parts! # 2 Minifigures and escort car included! # Wind turbine measures 13 inches (33cm) tall! # Truck and tr | |
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Your Questions About Wind Turbine Syndrome
Carol asks…
After seeing videos like these, do you still think more wind turbines are a good idea?
Or are they still good until they are brought into your own neighborhood?
Headaches, dizziness and nausea cause by the unnatural “flicker effect” of the giant shadows cast by the giant turbine propellers:
People being forced out of their homes because of health health problems cause by “wind turbine syndrome” caused by the flickering, EMF energy pollution emitted, noise, and vibrations.
Maybe I’m more sensitive than some, but even seeing videos of wind tubines spinning and causing blinking lights makes me sick.
admin answers:
The flicker effect is annoying. Maybe the agw socialist hippies would like to live in the shadows of wind turbines because they’re a bit like disco strobe-lights. They’re already dizzy and nauseous in promoting global warming.
Seriously, wind turbines have a role to play in isolated areas where generating power is a problem. But they’re expansive, expensive, ugly on any landscape, noisy and only work when there’s enough wind to make them turn. The idea of building them to power large communities is scary, and now apparently they lead to health problems. My opinion is to use them only where other power sources aren’t practical/possible.
Jenny asks…
After seeing videos like these, do you still think more wind turbines are a good idea?
Or are they still good until they are brought into your own neighborhood?
Headaches, dizziness and nausea cause by the unnatural “flicker effect” of the giant shadows cast by the giant turbine propellers:
People being forced out of their homes because of health health problems cause by “wind turbine syndrome” caused by the flickering, EMF energy pollution emitted, noise, and vibrations.
I’ve seen a lot of electrical plants and I would rather live near one of those if I had to choose. Seeing these giant EMF towers with their spinning propellers makes me sick, don’t they make you sick too?
It Girl: I agree–when you look at them they stand out as not belonging there. As being unhealthy and unnatural.
piegowdealer: The third video is in the US–Oregon.
And I’m not against clean energy at all–I still think electric cars are a good idea. I just think fake “clean energy” schemes/scams are bad ideas and bad for our health.
admin answers:
Hmm…strange, because we have wind farms where I am and I have not heard of this. At all. I have not felt massive vibrations, I have never seen shadows that large cast anywhere near residential housing, and I know of no animals who have suffered dangerous reactions to the stimuli. I have never experienced hearing much noise from them either. It isn’t like you can compare a wind farm with an international airport, a train station, a bus depot, a nuclear energy plant, an oil rig, a coal processing plant, a shooting range, a major waterway, a large city (more than a million), barges, lock and dams, a major grain plant, rendering plant, hog or chicken farm, or distillery (they all smell to high heaven) or even a military base where they set off ammunition–all of these are way worse (trust me–I have lived near all of these items at some time or another in my life).
If you do not trust my accute assessment (since I am not a scientist or an energy advocate of any kind), then try reading up on the views of wind energy from communities that have lived with it for many years. You will find that the level of satisfaction in this method of energy production is superior to that of energy created by other methods. Not everything you see on youtube can be trusted as comnplete fact–if you believe everything you see on there, then I would be worried. As for them not being attractive…well, not everything can be aesthetically pleasing, now can it. If you can’t seem to live near it, then move–people do it every day, especially when they live near noisy or obstructive things (airports are a great example). Otherwise, get over it–unless we want to spend billions of dollars in solar panels, or geo-thermal energy systems, this is one of the cleanest energy solutions we have available.
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Inpro Solar Metal Wind-Turbine with LED light Toy, Kids, Play, Children
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CafePress Wind turbines – Large Landscape Pet Tag – Standard Silver [Misc.]
![CafePress Wind turbines - Large Landscape Pet Tag - Standard Silver [Misc.]](http://ecx.images-amazon.com/images/I/41E%2BZls%2B-ML._SL160_.jpg) | Wind turbines. Computer artwork of an offshore wind farm. The blades of the turbines are turned by the wind, which produces electricity. Wind power is an important environmentally-friendly source of e | |
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Your Questions About Wind Turbine Generators Wiki
James asks…
How much longer are we going to put up with these stupid wind turbines?
Recent research has proved that the power that these hideous contraptions put out is unbelievably puny and that they are monstrously inefficient. When are the wind energy plant kissers going to admit that they have been conned?
admin answers:
They’re not bad. Research makes them better all the time, and they’re getting steadily more important. So many people don’t agree that they’re bad.
“At the end of 2006, worldwide capacity of wind-powered generators was 74,223 megawatts; although it currently produces less than 1% of world-wide electricity use, it accounts for approximately 20% of electricity use in Denmark, 9% in Spain, and 7% in Germany. Globally, wind power generation more than quadrupled between 2000 and 2006.”
http://en.wikipedia.org/wiki/Wind_power
They’re one important tool in fighting against global warming. They’re not going away any time soon.
George asks…
what are the necessary parts to build a small wind turbine?
what parts are required?
is a gearbox needed and what is the price range of everything since i don’t want to just buy a complete system, finally where are the parts available for purchase?
admin answers:
If you actually want to use it for anything serious, you are better off to buy a small wind turbine for a few hundred $ than to try to build one yourself. Prices on small win turbine generators have come down over the years.
If on the other hand, you just want a simple demonstration device, all you need is a generator with a shaft of adequate length, a fan assembly to bolt to it, a post to mount it on, output leads and some bits of hardware. This will produce a varying and uncertain voltage……
BUT…………..
You can then gussy it up with a wind vane and a pivot and add control electronics and you may well end up with something usable.
Here are two sites to help you go that route:
http://greenterrafirma.com/DIY_Wind_Turbine.html
http://www.mdpub.com/Wind_Turbine/
http://en.howtopedia.org/wiki/How_to_Build_a_Small_Wind_Turbine
Have fun!
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CafePress Blow Me Wind Turbine Dark T-Shirt – L Black
 | Cool, funny Blow Me wind turbine t-shirts, hats, mugs and gifts for environmentalists. Original, hip and stylish Blow Me wind energy, clean energy clothes, gear, reusable water bottles and canvas bags | |
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cgb_81708_1 Danita Delimont – Energy – France, Corsica, Maccinagio, Energy, Wind turbines – EU09 TDR0031 – Trish Drury – Coffee Gift Baskets – Coffee Gift Basket
 | France, Corsica, Maccinagio, Energy, Wind turbines - EU09 TDR0031 - Trish Drury Coffee Gift Basket is great for any occasion. This elegantly presented gift box comes with a 15oz mug, a biscotti cookie, 5 blends of gourmet coffee and includes a BONUS set of 4 soft coasters. Coffee selection includes French Vanilla, Kenya AA, Decaf Colombian Supremo, Chocolate and Italian Roast Espresso, sure to please a variety of coffee connoisseurs. All packaged in our signature 9" x 9" x 4" black box. | |
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Your Questions About Wind Generators Cost
Charles asks…
What size and cost for windmill power for school needed?
My school is trying to get an energy saving wind generator to help make it “green.” Our physics class is working on the cost / size issue, and I would like to know an estimate for both. I have been researching and according to my teacher our school uses 100,000 KWh each month.
admin answers:
There are two options here.
1) Install a wind turbine to meet the building’s maximum demand. This allows the school to “disconnect” from the grid.
2) Install a wind turbine that reduces the school’s carbon footprint by producing enough kWh to offset all the electric energy used by the school.
I suspect your teacher is interested in option # 2, since all you were given is the energy usage of 100,000 kWh per month.
The average wind turbine only produces about 25 to 30% of its rated power (RP). A really good location might get up to 40%. This value is referred to as the Rough Capacity Factor or RCF. I will assume your location has wind conditions that will result in an RCP of 30%
RP x RCF x 24 hours x 30 days = 100,000 kWh.
Solve for Rated Capacity:
RP = 100,000 kWh ÷ (RCF x 24 x 30)
RP = 100,000 kWh ÷ (.30 x 24 x 30)
RP = 100,000 kWh ÷ 216 hours = 462 kW.
Round this up to 500 kW.
Assuming an average cost of $3000 per kW, a 500 kW wind turbine is going to cost you about $1.5M before tax incentives and other credits.
Daniel asks…
what are the components needed in order to make both: a solar-panel and the system to apply it to daily use?
I heard on an add (trying to be VERY persuasive for me to get the guide) that building solar panels, wind generators and the system to put them to use, is easy and much cheaper than getting the set and it implemented by specialist, but the guide cost $50 so i cant be bothered, but i would still be interested in learning more about it for free! So anyone got the know how?
admin answers:
Well, you can’t make a solar panel. Unless what they were talking about was buying solar cells (those small 1″x1.5″ cells) and soldering them all up together to make a panel. Then buying or making an aluminum frame and putting a low iron glass sheet over it. Then wiring up the diodes for the panel you just made. I guess it would be cheaper if you don’t count the hours of labor you would have to put into it to make one panel. Oh also, you would need an inverter to convert it to AC. Some people just buy broken solar cells which cost next to nothing and make a panel out of that.
As far as the wind generators? I guess it would be far less time consuming than the solar panels and that might be worth doing but you will still need an inverter. They are actually pretty handy for camping, I made one that gave out 24v at max with a voltage regulator. The only problem with that is that you’re going to need more than one and they need to be bigger. Plus you need a healthy amount of wind. They are just trying to make a quick buck, this isn’t something practical really.
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CafePress Wind turbines – Large Landscape Pet Tag – Standard Silver [Misc.]
| Wind turbines. Computer artwork of an offshore wind farm. The blades of the turbines are turned by the wind, which produces electricity. Wind power is an important environmentally-friendly source of e | |
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qs_81708_10 Danita Delimont – Energy – France, Corsica, Maccinagio, Energy, Wind turbines – EU09 TDR0031 – Trish Drury – Quilt Squares – 25×25 inch quilt square
 | France, Corsica, Maccinagio, Energy, Wind turbines - EU09 TDR0031 - Trish Drury Quilt Square is a great way to create, showcase and remember a meaningful moment. Overall size is 10" x 10" with 7.5" x 7.5" image. Made of 100% poloyester that will not fade with washing. | |
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Your Questions About Wind Turbine Cost
Steven asks…
What does the wind turbine do in Farmville?
The wind turbine costs 1,500,000 and I need 45 neighbours…so I can’t buy it yet, what does it do?
admin answers:
It makes you realise you need to get a life.
Donald asks…
How much does a GE wind turbine cost. Is the cost of the tower included?
Wind turbine 1.5 megawatts to 3.6 megawatts.
admin answers:
A 5-Turbine wind farm in NJ cost 12.5 million dollars and supplies approximately 2500 homes. A 1.5 MW turbine can supply about 500 homes.
So, about 2.5 million dollars per turbine.
It would seem that it takes about 10-12 years for a 1.5 MW turbine to pay for itself, assuming a 500 dollar/year electricity bill.
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ALEKO® WGV75 12V 50W Nom 75W Max Vertical Wind Turbine Wind Generator
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Quiet in operation
Unique and purpose designed generator
The turbine spinning when other wind generators stall
Overall delivers more Ampere hours of power per day especially in low to average wind speed.
This is the one of the small size ALEKO® vertical wind generator, can be around the home, farm, boat, business, or anywhere else where the power is needed.
This is a great working conversation piece to show the potential o | |
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Men’s national wind turbine CONTRAST COLOR Tuxedo SLIT designed cotton men’s Hooded Jacket coat special black
 | Men's national wind turbine CONTRAST COLOR Tuxedo SLIT designed cotton men's Hooded Jacket coat special black | |
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cgb_88195_1 Danita Delimont – Energy – California, Mojave. Wind turbine energy farm – US05 BJA0192 – Jaynes Gallery – Coffee Gift Baskets – Coffee Gift Basket
 | California, Mojave. Wind turbine energy farm - US05 BJA0192 - Jaynes Gallery Coffee Gift Basket is great for any occasion. This elegantly presented gift box comes with a 15oz mug, a biscotti cookie, 5 blends of gourmet coffee and includes a BONUS set of 4 soft coasters. Coffee selection includes French Vanilla, Kenya AA, Decaf Colombian Supremo, Chocolate and Italian Roast Espresso, sure to please a variety of coffee connoisseurs. All packaged in our signature 9" x 9" x 4" black box. | |
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ALEKO WG450 450W 450 Watt 12 Volt Wind Turbine Residential Wind Generator with Charge Controller
 | ALEKO 450W Wind Generator is 450W 12 volt model. Fresh 2013 version just shipped from the factory. This is the latest design model. This item is new in the factory unopened box. Comes with Free Charge Controller CD5.0, instruction manual and 1-year warranty from purchase date. | |
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