Inpro Solar Wooden Solar Wind-Turbine
 | Solar Wooden Wind Turbine This great little executive toy is made from wood. Excellent for demonstrating solar power in action. Simple to put together. Natural wood model and stand with high quality solar cell. | |
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Your Questions About Wind Turbine
Carol asks…
How much electrical energy (in kWh) can the wind turbine generate in a year?
Assume a wind turbine with a hub 50.0 m above the ground, a rotor diameter of 50.0 m, and a wind-power conversion efficiency of 25%. The turbine operates in an area with an average wind-power density of 500 watts/m2 at 50 m altitude. How much electrical energy (in kWh) can the wind turbine generate in a year?
admin answers:
The question is written to allow for a rather simple solution, unlike the challenges of real wind turbine power and energy estimation.
Energy = Power x Time
Electric power produced = conversion efficiency x gross wind power
Gross wind power = power density x turbine swept area
So, with all the equations at hand, we can solve the problem.
Turbine swept area = 2 x pi x (25 m)^2 = 3927 m^2
Wind power density = 500 W/m^2
Thus, Gross wind power = 500 W/m^2 x 3927 m^2 = 1.9635 x10^6 W = 1.9635 MW
Electric power produced = 0.25 * 1.9635 MW = 0.49087 MW
Since the problem identifies the wind power as long-term average, we can calculate the average energy produced in a year.
Energy (Joules) = Watts x seconds
Energy = 0.49087 MW x 31536000 s = 15.487 x10^6 MJ
But the question asked for energy measured in kilowatt-hours (kWh).
So, Energy = 490.87 kW * 8760 h = 4300100 kWh produced in 1 year.
Unfortunately, a real wind turbine would produce this energy in an unscheduleable manner, typically peaking when the demand (load) is lowest. That’s the challenge of wind energy.
Mandy asks…
How much money would an average wind turbine save on a $240 energy bill on an average $31 day month?
On average days too. Like during a warm front. Also include the price of the wind turbine, and how much time it would take to pay off the turbine completely.
admin answers:
Wind energy is not continues and hence it is not going to cut your bill drastically. Even the wind farms can built not to feed continuously to the grid but intermittently. For individuals the cost of wind turbine is going to be very expensive compared to the power bill. Good to go for one with the impact on environment but if you ar going for saving dollars then you are going to be disappointed.
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2000 Watt 9 Blade Missouri GeneralTM Freedom II Wind Turbine (Black, 24/48 Volts)
 | This unit comes with:
Freedom ll PMG (PERMANENT MAGNET GENERATOR) WITH 28 MAGNET ROTOR
Freedom ll PMG has no brushes, very dependable
125,000 hours + of rated bearing life
Two heavy duty bridge rectifiers for converting 3 phase to dc output
Mounting Bracket and Heavy Duty 2 arms tail assembly
Tail fin measures 29" tall for maximum tracking
No slip rings to fail or replace. Wire tension system
Comes with 9 Raptor Generation 4 nylon carbon fiber composite blades
Aerodynamically tapered Genuine RA | |
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Your Questions About Wind Turbine Generators How They Work
Daniel asks…
Where can gold be used in wind turbines?
The main parts of a wind turbine is the blades, the rotor, the generator, the tail and the tower. But where (and how) can “gold” be used in one of these parts (or others) when the properties of gold is put into consideration?
Thank you for your answer, but if you HAVE to use gold in a wind turbine where would you use it?
admin answers:
Gold are good conductor of electricity, and sometimes it will alloy it with copper for semiconductor devices, gold are not good in turbine blades or same, because of the brittleness against high torque force, it is also not advisable in generators and rotors, they are not enough to produce magnitic force to convert it into electrical energy, it also not advisable in the construction of the tail and the tower, you need enough strength to the carry the whole weight of the wind mill, and the most number one reason is……………. It is too expensive to construct a huge wind turbine made of gold
John asks…
How can i do a wind generator that creat electricity for a science fair project?
Hi, my teacher told me to create a wind generator for my science fair.Its not only doing the wing generator,no, i have to make electricity with it, like i get a bulb and it had to turn on with out batteries, only with the wing thing.Can someone give me like a web page or something that could help me please. HELP!!!!!
admin answers:
I think you mean wind turbine. A wind generator would generate wind, ie, an electric fan.
Look on line, there are dozens of possibilities. Search google for “school wind turbine”. Below link is one of the results.
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K3 Wind and Solar Mobile Charger (Green)
 | Wind and Solar portable battery charger | |
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Skystream 3.7 Wind Turbine Blades Set of 3 Balanced Marine Coating SWWP
 | These will mount on the Skystream 3.7 wind generator system. They have the Marine coating that is weather and salt resistant and also gives them that nice blue/green hue. They are also balanced and ready to mount. These are new in box and were picked up after SWWP closed its doors in Flagstaff. Please note, you are getting the BLADES ONLY, nothing else in included in this purchase. THERE ARE NO RETURNS ALLOWED ON THIS ITEM UNDER ANY CIRCUMSTANCES | |
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Your Questions About Wind Generators For Home
Thomas asks…
How do I make home made power?
How do I make home made electricity with solar power or a wind generator? I’ve been looking into using wind and solar energy to power my home, reduce electricity consumption and lower my carbon footprint. I’ve looked into solar hot water systems and home wind generators, but what’s the most efficient way to reduce my energy consumption?
admin answers:
Wind generators and solar panels can be expensive, and can take years before they pay for themselves. Often it uses so much CO2 to make a solar panel or wind generator that they can actually increase your carbon foot print, not reduce it. I’ve found that the best way to create home made power is from home made equipment, it’s actually surprisingly straight forward and a fraction of the cost. I used this guide: http://tinyurl.com/ljyok7 to create a simple wind generator which has seen my energy costs drastically reduced.
Sandy asks…
Grid tie-in Home Wind Generator, have you any knowledge of this?
I’m investigating the feasability of installing a grid tie-in home wind generator. Has anyone here installed one of these systems into their home‘s power system?
It’s my understanding that you can install a new power meter to allow for “net metering” or reversing of the numbers by the created power from the generator, thereby saving money or reducing your monthly power bill.
admin answers:
There is lots of information on the Internet. In California, you can get net metering. There are some sticking points. The tower has to be at least 60 feet tall. My neighbors would not like that at all.
It is true that you probably will not get a big enough unit to supply all your power, with a surplus.
Think twice about batteries. If one has net metering, the only value of batteries is during power outages. Batteries cost a bundle, need to be maintained, need occasional replacement, and eat up part of the power you produce. I elected not to have batteries on my photovoltaic solar system
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Solar Wind Turbine – Polished Aluminum
 | This beautiful 1:87 scale miniature wind turbine makes a great executive gift. Restful and hypnotic in action. Turbine blades spin when sunlight falls on the solar panel. Polished aluminum model and stand with high quality solar cell. Batteries not needed. Requires simple assembly. Excellent for demonstrating solar power in action | |
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PTLXom Men Wind Turbine Shirt
 | PTLXom Men's Wind Turbine 100% Cotton T-Shirt | |
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Your Questions About Wind Turbine Syndrome
Joseph asks…
Isn’t it time to face the truth about wind power?
Wind turbines are very expensive to build and install, and maintenance costs are ridiculous. They kill thousands of birds and bats, are aviation hazards, and are so noisy that even the environment-minded Kennedys blocked the construction of a bunch of them on Cape Cod. They even cause a disease called Wind Turbine Syndrome in people who live nearby. Now it turns out that wind farms cause climate disruption as well. On top of that, it has been proven that “mathematically windmills are completely unsustainable” (see link below). So–shouldn’t the politicians look at the facts and stop spending our money to promote a technology that is profoundly stupid?
http://www.telegraph.co.uk/earth/earthnews/9234715/Wind-farms-can-cause-climate-change-finds-new-study.html
http://nikitas3.com/1827/mathematical-proof-that-windmills-dont-work/
admin answers:
None of the above is totally factual. Bird kills? Some, but high rise office buildings kill thousands, as do pesticides, herbicides and house cats. While building wind turbines ain’t cheap, they’re far cheaper per kilowatt hour over X years of operation than coal burning plants when ALL of the costs over 5/10/15 years are considered. Maintenance as per hours of operation divided by hours under repair per unit is less than coal plants when again, all of the supply tail and disposal issues are factored in. It wasn’t the ‘Kennedy’s’ alone that were opposed to the Cape Cod project…it was everyone on that particular part of the east coast. Wind Turbine Syndrome? Try living down wind from a coal plant.
Here in the southwest we have sun AND wind almost everyday. Even on the ‘calm days’ the sun shines bright and on the few really cloudy days the wind blows at a steady clip. In the mid west you can count on a lot of wind. We’re talking about at least 1/3 of this country that could get by with only a minimum of coal or gas burning power plants. Of course that would cut a massive hole in the coal industry and the coal burning power plant companies…so of course they don’t any part of 21st. Century technology. 99% of the propaganda against solar and wind is exactly that…propaganda to save a 19th century technology from going extinct.
Lizzie asks…
Wind turbine syndrome? Infrasound?
Apparently those huge wind turbines can give off infrasound (sound >20 Hz) which causes a lot of things like nausea, problems sleeping, difficulty concentrating etc. What i am wondering is do they ALL give off this and if so at what distance from them is the infrasound at its prime? I would like to find out also is there a way of producing infrasound at home for the purpose of experiment to see if it has any effect (as some people are apparently more affected than others) and has anyone had any bad experiences with it?
Thanks 10 points.
admin answers:
I quote
“With regard to effects of noise from wind turbines, the main effect depends on the listener’s reaction to what they may hear. There are no direct health effects from noise at the level of noise generated by wind turbines. It has been repeatedly shown by measurements of wind turbine noise undertaken in the UK, Denmark, Germany and the USA over the past decade, and accepted by experienced noise professionals, that the levels of infrasonic noise and vibration radiated from modern, upwind configuration wind turbines are at a very low level; so low that they lie below the threshold of perception, even for those people who are particularly sensitive to such noise, and even on an actual wind turbine site.”
See link for the rest.
If your ‘source’ is anything other than the usual ‘scare mongering’ by the no-nothing morons of the gutter press, by all means counter this conclusion ..
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Power Wind Mill Charm In Sterling Silver, Charms for Bracelets and Necklaces
 | Experience the quality of Rembrandt Charms. This Power Wind Mill Charm In Sterling Silver is stamped with the metal quality mark and RQC trademark. All Rembrandt products have a Lifetime guaranteed. Sterling silver charms are plated with rhodium, a precious metal in the platinum family, which is used over our sterling silver to prevent corrosion or tarnishing. Please note the images above are enlarged to show detail. The charm is 20.26 MM long x 6.89 MM wide, it's handcrafted, made to perfectly | |
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Wind Turbine Wholesaler SWOT Analysis Plus Business Plan
 | Our Wind Turbine Wholesaler SWOT Analysis will provide you with the comprehensive documentation that you will need in order to determine the strengths, weaknesses, opportunities, and threats that your business will face as your develop or expand your business operations. Our product also includes a full business plan specific for a Wind Turbine Wholesaler. This business plan has been developed in MS Word/Excel and is appropriate for seeking start up or expansion capital from an investor, bank, S | |
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Your Questions About Wind Turbine Generators Wiki
Ruth asks…
How does a Vertical Axis Wind turbine work?
i am writing a report and i need to know how the generator on a VAWT works please thanks ~William~
admin answers:
Each vertical vane is an airfoil (airplane wing) that generates lift as air passes by it. This lift is changed into rotational torque because of the position of the vane with respect to the vertical axle.
See: http://en.wikipedia.org/wiki/Vertical_axis_wind_turbine
Laura asks…
How does a wind turbine work?
I need to know for a science project.
admin answers:
Yay. Science projects are a lot of fun, so I wish you luck with yours. 🙂
A wind turbine is a device that converts kinetic energy from the wind into mechanical energy. If the mechanical energy is used to produce electricity, the device may be called a wind generator or wind charger.
There is a ton of info on the sites that are pasted below.
Http://www.wisegeek.com/how-do-wind-turbines-work.htm
http://www.greenlivingtips.com/articles/65/1/How-wind-turbines-work.html
http://en.wikipedia.org/wiki/Wind_turbine
http://science.howstuffworks.com/environmental/green-science/wind-power.htm
the first three seemed to be most helpful.
Good Luck 😉
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1600 Watt Missouri Raider Wind Turbine (black, 12 Volts)
 | Wind Turbine Features:
New Freedom PMGTM for efficient three phase power generation.
3 phase bridge rectifier for converting to DC output.
Heavy duty hub spacer/stabilizer.
PMG mounting bracket and heavy duty Stars & Stripes wind turbine tail
Mounting Bracket fits on 1.5" schedule #40 or #80 pipe.
Comes with 11 gray or black RaptorTM carbon fiber composite blades.
Aerodynamically tapered blades for maximum output.
Made in Seymour Missouri U.S.A. by Missouri Wind and Solar
Makes | |
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cgb_96637_1 Danita Delimont – Farms – Washington, Walla Walla. Farm wind turbines – US48 RDU0188 – Richard Duval – Coffee Gift Baskets – Coffee Gift Basket
 | Washington, Walla Walla. Farm wind turbines - US48 RDU0188 - Richard Duval 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
Paul asks…
What is a good web site to share my wind generator design?
I have built my own wind generator and i need some feedback on what people thing of my design. Do you know of any web sites where i can share it?
admin answers:
Awea.com
American Wind Energy Association
Donna asks…
What size wind generator do I need to replace my electricity-winter 800kwh summer 2400kwh?
I live in a very windy place and would like to consider a wind generator – I don’t know how to figure out what output I would need – my electric usage monthly varies from 800KWh in winter to 2400KWh in summer.
admin answers:
The quick answer is 2400kwh would probably need close to a 20kw generator but if you want to get an average for the year maybe 1600kwh average you might get away with 10kw.
Very windy is a relative term so you will need to look at a wind map. Go to http://www.windpoweringamerica.gov/wind_maps.asp and select your state and then find your area.
You will need to take that information and check it against a power curve for different wind turbines. This is one for a few turbines in the 10 to 20kw range. Http://www.windturbine.net/performance.htm This will give you an annual output for this brand of wind turbine. If you look at the chart the left column is the 20 and the far right is the 10 and notice how different the outputs are from just 12 to 15 mph wind speed, that is why an accurate wind speed is important.
Also I don’t know about your place but where I live we have much better winds in the winter than summer so for me average through the year is what I go by.
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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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CafePress Blow Me Wind Turbine Organic Men’s Fitted T-Shir Organic Men’s Fitted
 | 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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Ten-high 100W 200W 300W DC input 12V Portable Wind charge controller for DC Output Wind Turbine Generator
 | Product performance:
1.This controller can control wind turbines for automatic charging battery. Under the condition of the battery is full of, through internal automatic control circuit to make the brakes, when the battery voltage drops to the recovery voltage, wind turbine back for battery charging, so as to protect the wind turbine and battery.
2.Comprehensive waterproof protection. This controller USES the seal completely waterproof design, all of them, and don't have to worry about air h | |
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Your Questions About Wind Turbine Jobs
Mary asks…
what is the better career computer business or wind technology?
i have always liked to work with computers but not alot of jobs where i live. I could go work on the wind turbines i would have to move but not far im just not sure wich one is better right now.
admin answers:
My wife during the last couple of weeks found herself without a job so she used the opportunity to hunt for a change of career. She was really stuck until she unearthed the resource in the box below which gives tips and tricks on how to choose a career. Now she is aware of where she’s going, and more importantly how to arrive.
Susan asks…
do you need a license to work in a wind power facility in Alberta?
I know you need a power engineer license to work in power plants, because the complex and high pressure and temperature process. But for wind turbines the process is completely different. It still requires to have a power engineer license to work in a wind power site?
admin answers:
Possibly the law requires a license for the man in charge, but likely the other employees do not need a license, but a person with a license (or other credentials) would be given preference for a job opening, all else equal. Neil
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