wind turbine generators
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?
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
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!!!!!
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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Which is the best DIY solar panel/wind turbine program? Real people only, please.?
I’ve been looking at all of the options for installing solar electricity systems online, and I’ve noticed that even the so-called review sites all seem to be part of a sales pitch….haven’t found a single, independent review of any of these products. Has anyone out there actually used any of these (Earth4Energy, HomemadeEnergy, etc.), and if so, how good are they?
If you have noticed that Earth4Energy is a scam (which it is), then you may be amused by my analysis of it at http://www.nlcpr.com/Deceptions6.html
If you want to build a wind turbine yourself (like a good engineer would), then get the following book:
Homebrew Wind Power
A HANDS-ON GUIDE TO HARNESSING THE WIND
Dan Bartmann & Dan Fink
Foreword by Mick Sagrillo
Published by Buckville Publications LLC
You can get this from www.otherpower.com This is a startlingly complete book and it has all the background theory you need too. They explain why, for example, you cant use a car alternator or something from a generator, and then proceed to build alternators from scratch. The references are compete — if you explore them and have the time to read, you will be right up there with the pioneers.
As for DIY solar, you can get the parts (panels, inverters, batteries, charge controllers) individually from many sources and make a system. It will not be cheap. You can’t make your own silicon cells, and probably aren’t up to designing the electronics, can’t make your own batteries etc.
My recommendation is this: Get the wind book. Look through the web sites of some of the better looking solar dealers, and if they seem to be “no bull” then e-mail them and tell them what you want. E.g. An entry level system, 80W panel, battery, inverter and charge controller so that you can make enough power for say, a small laptop. The good ones will be able to tell you what works together.
If you are thinking of a whole home solution, then you have a lot of reading to do. You need to switch to natural gas or propane (no electric heat, electric stove, electric hot water) and absolutely mininize the electrical load.
It would be nice to market a good DIY manual, but with a truthful title like “Generate power at home for more than you are paying now” or “With thirty thousand dollars in equipment, you too can avoid those monthly power bills” sales would be pathetic.
As for “real people” comment, when I see questions like this, I wonder if I am wasting my time because many of the questions are not real either. They are simply created by scammers so that they can add their scam replies and rate it best answer. I find this particilary galling when someone says, “this is for my science fair, and I am 14 years old” and all the answers are Earth4Energy scammers. Other times, I find my comments pasted on fake energy sites with links to pharmaceuticals. It is a mad world out there.
Does anybody know of any alternative energy companies that offer stock?
or where to find out.
GE electrifies the world by providing reliable, efficient products and services for the energy industry. We help businesses and authorities that generate, transmit or use electricity. We work in all areas of the energy industry including coal, oil, natural gas and nuclear energy, as well as with renewable resources such as water and wind energy.
Americas Wind Energy Corporation (AWNE.OB) manufacturing and marketing of medium sized (500 – 1,000 megawatt (MW)) wind turbines for the North American market.
Babcock & Brown Wind Partners (BBWPF.PK) An Australian based specialized investment fund focused on the wind energy generation sector
Gamesa Corp. (GCTAF.PK) 18% of the world’s share of the wind turbine market. Based in Spain.
Kore Holdings (KORH.PK) A power provider and marketer of alternative energy from wind farms, hydro and distributed power facilities.
McKenzie Bay International Ltd. (MKBY.OB) Develops wind powered alternative energy systems.
Mass Megawatts Wind Power Inc. (MMGW.OB) Develops prototype wind energy production equipment.
NaiKun Wind Energy Group Inc. (NKW.V TSX Venture Exchange) Wind energy developer in the Haida Energy Field off the coast of British Columbia since 2001.
Scottish Power plc (SPI) A leading developer and operator of renewable energy in both the UK and the US. It is one of the largest providers of wind energy in the US.
Shear Wind Inc. (SWX.V Canadian Venture Exchange )Provider of wind-generated energy in Atlantic Canada.
Sea Breeze Power Corp. (SBX.V Canadian Venture Exchange ) Developer of large-scale windfarms and underwater electricity transmission lines in British Columbia.
Tower Tech Holdings Inc. (TWRT.OB) Involved in the engineering, manufacture, and sale of wind turbine extension towers and monopiles to the wind energy industry
Vector Wind Energy Inc. (VWE.V Canadian Venture Exchange ) developer of wind energy projects in Canada.
Vestas Wind Systems (VWSYF.PK) 34% of the world’s share of the wind turbine market. Based in Denmark.
U.S. Wind Farming (USWF.PK) The federal court in Chicago entered a Final Judgment as to U.S. Wind Farming on October 20, 2006.
Western Wind Energy (WNDEF.PK) Produces clean renewable electrical energy from over 500 wind turbine generators located in Tehachapi and San Gorgonio Pass (Palm Springs), California.
Most of your stock brokers or online brokers will help you to invest. Here is a is of brokers that Yahoo came up with:
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Make electricity with steam at home?
This is probably a silly idea but I really like the idea of making my own electricity. I’ve thought about solar and wind but neither would really work for me. My wife & I will be building a new home in 9-10 years and I have a new idea…. We want to have one of those outdoor wood burning furnaces to heat the house. Is there such a thing as a small steam powered electric generator? If there is, maybe I could use some of the heat generated in the furnace to boil water, make steam and turn a small turbine to generate electricity. This way, I could heat my home in the winter and make my own electricity all year long just with wood. Just an idea (maybe a stupid one). If anyone has any info on this subject please share it with me. Thanx.
The killer here is efficiency. The efficiency of a steam turbine is only on the order of 30%. The equipment is pretty expensive too unless you go with some kind of home brew set up which can be dangerous. You would need to burn a lot of wood to make any serious amount of power. It would probably be cheaper to buy from the grid.
How can I start a wind turbine Business and where is a good place to look for grants?
The energy efficiency sector will skyrocket the next few years, so good choice with that!
Wind farms are starting to pick up attention from the general populace due to the dwindling supplies of fossil fuels and their rising prices, which in turn contribute to the rising power expenses. The use of fossil fuels to generate electrical power is also unfriendly to the environment because of the pollutant nature of fossil fuels.
There are two reasons that people may want to invest in wind power. First, to save up on power expenses by relying fully or partially on wind turbines to derive electricity; Second, to become more environment friendly. No matter what the reasons may be, you can take advantage by setting up a wind power business.
A Good Location for Wind Farm Business
The first thing that you have to ask yourself when planning to engage in a wind power business is, Do I have the right place to harness the power of the wind? Household wind power systems do not need to worry about this since their power requirements are minimal, but to be able to feed houses you would need to produce a lot of electricity. The best place for this is a location where there is plenty of breeze to turn your windmills, like near the shorelines as well as high places.
You Need Windmills
Windmills or wind turbines are the driving force behind wind power systems. It is through these turbines that the wind is used to harness electricity by using the kinetic energy generated by their turning motion. The motion is initiated when wind is blowing the turbine panels. No matter if the wind blowing is a breeze or a gale, the motion will continue to harness kinetic energy and convert it into electrical energy.
Wind turbines used in a wind farm can either be commercially made or made at your own home. Buying commercially means you can get high-quality turbines, but would cost a lot to buy and install. Using home-made turbines, on the other hand, would require a bit of work by hand but are cheaper. Materials for home-made turbines can cost you only by the hundreds, while commercially made windmills may cost you thousands to acquire.
If you plan to invest on a wind power business, you would need to be like the big-time power distributors and install power lines from your windmills or power source to your clients. Fortunately, power distributors nowadays also buy power from independent power distributors whether they are using natural power sources or fuel fossils. As a windmill power generator, you are in line to become one of the power distributors feeding power to the local power company.
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Can solar panel and wind turbine generator system run continuously for 6 month or longer?
I am planning on building a solar panel and a wind turbine that run in one generator. I just want to know if the generator can run for 6 month straight or longer? Anyone with some advices I would appreciated.
Well unless you have daylight and wind continuously for 6 months the answer is no.
How to build up a small wind power generator for home?
I want to build u an average sized wind turbine generator (about 1 Meter each Wing Size). so that i can get electricity for my home based appliances such as TV, AC, Refrigerators, etc.
What would be the requirements.. so i need to take any statutory approvals / license to do so,, and how to give input to my main Line into the home.
thanks to all in advance
First thing: Is this going to be a temporary source (in case of a power cut) or a more permanent source.
Because it will be an extension to your house, you might need planning permission. You have a certain ‘amount’ you can build on without permission, so if you haven’t used it, nor has a previous owner, than you can build it with permission. You can check this by going to your council.
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How much power is required to power a large family home?
I am doing some research into setting up a wind turbine for my house. I see terms like ‘kW hours’ for energy or power consumption. If my house uses 1500kW hours of energy per week does this mean i need to run a 1500kW generator for 1 hour to satisfy my power needs?
How would i then go about sizing the required turbine needed to effectively power my home?
This is all new to me so i can see alot of follow up questions coming/
In terms of system design, you need to consider the load imposed on the supply. In your question you mentioned a figure of 1500 kWh per week. This seems very high. It represents an average of 35 amps being drawn from the supply 24/7.
I have a 4 bedroom house occupied by 2 adults and the minimum load, during the night falls to 0.8 Amps and peaks on some days to around 18 Amps for very short periods, the average through the day is about 2 Amps.
One kW represents a load on the supply of about 4 amps for 240 volt supplies and about 8 on 120 volt supplies Understanding the load that is being imposed on the supply will help you to decide the dimensions of the system you need.
For local power generation (micro generation) you can use wind or water turbines dependant upon location, and you can also use peizo electric generation (solar cells), all these are referred to as primary power. In addition to this you will need storage which is in the form of batteries.
To use the battery power you will need an inverter, which generates power at mains voltage from the low voltage batteries. Additionally you will need a regulator, which controls the charge/discharge of the batteries, and is essential for efficient battery use and economical battery life.
If your system is capable of generating power surplus to your requirements, you can sell this to your grid supplier for quite a reasonable return.
Is it true that wind turbines can never produce enough energy in their lifespans to offset its creation?
I’ve heard on several occasions that wind turbines are not economically feasible because it takes an inordinate amount of time and money, such that it will never produce enough energy to recoup that which was lost in building the turbine. Is this true? Can anyone give me a source?
Hey Patrick, this concept has been around since about 1998 when it first surfaced in regard to solar panels. There was a lot of complaints that solar panels never earn back their, “Embodied Energy,” which is a phrase referring to how much energy it takes to mine raw materials, ship them to a factory, build the product, ship it to it’s destination and install it. To be honest, it is difficult to put an exact energy price on something like that, there are almost limitless variables, such as which mine was used, where it was shipped, how it is installed and used in the end, and so on. A non profit group called, Solar Energy International finally offered some grants to a few colleges to research this. In the end, they couldn’t come up with an exact timeline, but a range based on the above variables.
First of all, solar panels actually do repay their embodied energy some time between 1.5 and 6 years after they are installed. Virtually all manufacturers warranty their product to last at least 25 years, and typically they operate well beyond this time. Similar work was done later with wind turbines, and the results are very similar. The main difference being the range of payback time is wider, meaning it’s possible for a turbine to repay its embodied energy faster, like in less than a year, but it may take as long as 9 years. This is because shipping a utility sized wind turbine can take a huge bite into its embodied energy budget depending on how far it has to go. Solar panels can fit in the back seat of a good sized car, some wind turbines have specially designed hauling vehicles that might have to drive across the country, or across the street. But when you look deeper down this rabbit hole, you eventually learn that non of this matters, I’ll explain.
Electricity has been around since Thomas Edison nearly burned down his house running high amounts of current through bailing wires inside old mason jars, so it isn’t going away anytime soon. The question becomes, “What is the best way to produce it?” Let’s assume you build a 10 KW wind turbine, and put it alongside an efficient conventional power source, say a natural gas fired turbine 10 KW generator. Which will earn back its embodied energy faster? The answer is the gas generator never does. You have to remember that once you build a natural gas generator, coal plant, or any other non renewable energy based power plant, you now have to feed it fuel for the rest of it’s life. It’s conversion rate will always be something below 100%, so in the end it slowly digs itself a deeper and deeper energy hole that it can never crawl out of. At least the wind turbine has a chance to get even in it’s lifetime. This is the key to what makes renewable energy so great, it’s really the difference between buying a home and renting an apartment, one day the home will be paid off, the apartment never is.
We live in a home that is powered by the wind and sun today. About 12 years ago we started looking into solar and wind when our electricity was constantly going out. It began as a small backup plan, just to run a few lights and some electronics. Over time it became more of a hobby and lifestyle, like growing your own tomatoes instead of buying them at the store, we just grew electrons in our garden. Now our home generates over 90% of its own electricity, and we use the power company as our backup source. Even though it will take years to get even with the power bill, it’s worth it to us, and we’ve turned a lot of heads. Once each year now I am invited to the local schools to teach solar power to the 5th graders, then they run a field trip out to our house to see a working solar and wind powered home. Since then the power companies have been busy building wind farms and looking into solar, geothermal and biomass energy. They even have a methane plant alongside a landfill in the next county. Most people are not aware of these things, but they are happening. They are busy complaining about wind mills never earning back their manufacturing energy, solar being too expensive, or hybrid cars not really saving and gas. There is research on these subjects, and it’s available for the asking if you look for it online. My suggestion is you look into it and become better informed insteading of asking hacks like me online for advice. I’ll include some sources below. Hope this answers your question. Good luck Patrick, and take care, Rudydoo
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Who is a manufacturer of a small generator that can fit inside of a small wind turbine?
Any help is very appreciated. I’m looking any manufacturer EXCEPT ones in China, which may be a kind of picky exception, hahaha.
Try looking on www.thomasnet.com
Would an automotive alternator do ? THey would have the advantage that, being mass produced, they would be cheap. Also spare parts would be available through a huge supply chain, parts stocked on someone else’s inventory cost….
How do you measure windmill efficiency without using a generator?
Is there a formula I can use to convert the number of the windmill’s rotations into watts or some other measurement? I’m doing a science fair project about windmills and I don’t have a generator I can use to measure the amount of electricity produced. The only formula I found is watts = (Kh x number of disk rotations x 3600) / number of seconds, but I don’t have the Kh.
I’m really confused, please help!
Go look at www.awea.org for general info on turbines.
Unless you know the specific turbine manufacturer and model, it will be very difficult to relate turbine speed (in rpm) to power produced.
Besides, how do you expect to relate rotational speed to efficiency?
Efficiency is Output electrical power divided by Input wind power.
Perhaps you should look at the capacity factor of wind turbines, and the resulting relative cost of electric power as it relates to capacity factor.
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how is using energy resources in Antarctica important?
The Australian Antarctic Division (AAD) received a grant of half a million dollars from the Australian Greenhouse Office to demonstrate the use of hydrogen generated by wind in Antarctica. The demonstration project at the remote Mawson site will research the safety and operational aspects of using hydrogen on station, as well as its viability as a major energy carrier.
Hydrogen is not, as many people believe, an energy source. Neither is electricity. In contemporary energy systems, electricity serves as an energy carrier. It is produced from primary energy sources using technology such as diesel powered generators or wind turbines. It is the same case with hydrogen.
Hydrogen will be generated using energy from the Mawson station’s wind turbines, stored and used in a test fuel cell, as fuel in a heater and in one of the station vehicles. Two Enercon wind turbines, capable of withstanding blizzards in excess of 300 km/h, were recently installed. Together, the units provide one MW of electricity for use at the research station and for the hydrogen project — and dramatically lower the need for imported diesel fuel.
“The Mawson system will generate well over ten times the power of existing Antarctic wind-power systems while having a much lower environmental impact than the current option of diesel fuel now used throughout Antarctica,” said Australia’s Environment Minister Robert Hill, regarding the wind turbine construction. “When the system is fully developed, an Antarctic station will, for the first time, be able to use a renewable source to meet virtually all its energy needs.”
For the upcoming hydrogen demonstration project, the AAD plans to install the test fuel cell and heater at the field camp on Bechervaise Island. They will provide electricity and heat for the scientists involved in the penguin monitoring program.
By the completion of the project, the staff at AAD expects to gain sufficient information to be able to model the large-scale use of hydrogen to supplement their energy requirements.
Hydrogen used by the Bureau of Meteorology staff for daily weather balloon flights is currently generated on site. Electrolyzers, powered in part by wind energy, produce hydrogen from water. Any excess hydrogen produced will be stored and utilized for the project. The system will be installed and implemented during the 2005-06 season.
The AAD expects that the use of hydrogen as a fuel will reduce the need for fossil fuels during those times when the wind energy is insufficient to power the station. The hydrogen will fuel either a large-scale fuel cell system or an internal combustion engine generator.
The ultimate aim is to be able to run the station and all the field camps without the use of any fossil fuels. The AAD believes this may be the first attempt to use hydrogen as a major energy source in Antarctica.
How does tidal power work?
Tidal power is the only form of energy which derives directly from the relative motions of the Earth–Moon system, and to a lesser extent from the Earth–Sun system. The tidal forces produced by the Moon and Sun, in combination with Earth’s rotation, are responsible for the generation of the tides. Other sources of energy originate directly or indirectly from the Sun, including fossil fuels, conventional hydroelectric, wind, biofuels, wave power and solar. Nuclear is derived using radioactive material from the Earth, geothermal power uses the heat of magma below the Earth’s crust, which comes from radioactive decay.
Variation of tides over a day
Tidal energy is generated by the relative motion of the Earth, Sun and the Moon, which interact via gravitational forces. Periodic changes of water levels, and associated tidal currents, are due to the gravitational attraction by the Sun and Moon. The magnitude of the tide at a location is the result of the changing positions of the Moon and Sun relative to the Earth, the effects of Earth rotation, and the local shape of the sea floor and coastlines.
Because the Earth’s tides are caused by the tidal forces due to gravitational interaction with the Moon and Sun, and the Earth’s rotation, tidal power is practically inexhaustible and classified as a renewable energy source.
A tidal energy generator uses this phenomenon to generate energy. The stronger the tide, either in water level height or tidal current velocities, the greater the potential for tidal energy generation.
Tidal movement causes a continual loss of mechanical energy in the Earth–Moon system due to pumping of water through the natural restrictions around coastlines, and due to viscous dissipation at the seabed and in turbulence. This loss of energy has caused the rotation of the Earth to slow in the 4.5 billion years since formation. During the last 620 million years the period of rotation has increased from 21.9 hours to the 24 hours we see now; in this period the Earth has lost 17% of its rotational energy. While tidal power may take additional energy from the system, increasing the rate of slowdown, the effect would be noticable over millions of years only, thus being negligable.
Types of Tidal Energy
Tidal power can be classified into two main types:
* Tidal stream systems make use of the kinetic energy of moving water to power turbines, in a similar way to windmills that use moving air. This method is gaining in popularity because of the lower cost and lower ecological impact compared to barrages.
* Barrages make use of the potential energy in the difference in height (or head) between high and low tides. Barrages are essentially dams across the full width of a tidal estuary, and suffer from very high civil infrastructure costs, a worldwide shortage of viable sites, and environmental issues.
* Tidal lagoons, are similar to barrages, but can be constructed as self contained structures, not fully across an estuary, and are claimed to incur much lower cost and impact overall. Furthermore they can be configured to generate continuously which is not the case with barrages.
Modern advances in turbine technology may eventually see large amounts of power generated from the ocean, especially tidal currents using the tidal stream designs but also from the major thermal current systems such as the Gulf Stream, which is covered by the more general term marine current power. Tidal stream turbines may be arrayed in high-velocity areas where natural tidal current flows are concentrated such as the west and east coasts of Canada, the Strait of Gibraltar, the Bosporus, and numerous sites in south east Asia and Australia. Such flows occur almost anywhere where there are entrances to bays and rivers, or between land masses where water currents are concentrated.
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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.
Induction generators are used for stand alone systems, synchrounous generators could be used as well.
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!
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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how can i build a wind turbine at home?
I want to build a wind turbine that will allow me to power my home. Can this be done and can you show me where i can find some wind turbine plans?
I have recently built three as a hobby. I have actually managed to lower my electric bill by almost 30% (I use only 2 of the generators). The first one I built was a true learning experience. I learned, a bit later, that the blades really need to be aircraft like.
Listed below are three sites that I know will get you started on the right path. Have fun, and feel free to write to me. I’ll give you the benefit of my experience, and hopefully, you can teach me something new too along the way.
How much would it cost me to install a complete wind turbine system?
With my electricity bill as high as it is, I’m considering going off of city power and installing a wind turbine system that can power my whole house. I live in the state of Oregon. Can someone give me a ball park cost for such an endeavour and what kind of performance I could expect? Thanks.
A few years ago a coworker looked into this because they found out after they moved a mobile home onto their property that it was going to cost about $10,000 to have electric brought in. The wind turbine setup was also about the same price. Remember that your generator needs to be larger than your average load to charge batteries for when the wind does not blow. I am in Oklahoma where we have some of the best conditions for wind generation and still would need considerable storage.
I helped a friend build his own to power a storage/shop building. He did it cheap by getting an old windmill from a farmer for $100 including the tower. Bought a used truck alternator at Pick a part junkyard. For $25. The batteries and inverter cost another $500.
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I want to invest in wind energy, but am not sure where to put my money.?
I want to invest in the wind energy industry, but I am not sure where would be the best place to put my money.
Which “component” of the wind energy industry is the smartest place for my money?
If you want to speculate I suggest AMSC. High risk.
American Superconductor Corporation, an energy technologies company, together with its subsidiaries, provides an array of solutions based on two proprietary technologies, programmable power electronic converters and high temperature superconductor (HTS) wires. Its products, services, and system-level solutions enable generation, delivery, and use of electric power. The company’s AMSC Power Systems segment produces products to increase electrical grid capacity and reliability; supplies electrical systems used in wind turbines; sells power electronic products that regulate wind farm voltage to enable their interconnection to the power grid; licenses proprietary wind turbine designs to manufacturers of such systems; provides consulting services to the wind industry; and offers products that enhance power quality for industrial operations. Its power electronic devices include power electronic converters and thyristor switches; and grid reliability, power quality, and grid interconnection systems consist of Dynamic VAR, Static VAR Compensators, Power Quality-Industrial Voltage Restorer systems, and Power Quality Static VAR compensators; and wind turbine designs and services include design and development, customer training, and support, as well as wind turbine electrical systems and components. This segment offers its products to the transmission and distribution, wind power, and manufacturing industries through manufacturer’s representatives. Its AMSC Superconductors segment manufactures HTS wire and coils; designs and develops HTS products, such as power cables, fault current limiters, and rotating machines, such as motors, generators, and synchronous condensers; and manages large-scale HTS projects, such as HTS power cable system design, manufacturing, and installation. This segment sells its HTS wire to original equipment manufacturers through direct sales force and distributors. The company was founded in 1987 and is headquartered in Devens, Massachusetts.
I wanna use golf cart batteries but which one?
I found this system on the internet
and i know its already grid tied but still i wanna add in some batteries for emergency situations and people keep suggesting golf cart batteries. What voltage of golf cart batteries should i purchase? they keep saying that the voltage used by the solar panels, the batteries and the inverters must be the same but i dunno how to determine the voltage used by the solar panels in the link above.
Hey Stefan, actually, you can build up a, “hybrid,” solar/battery/grid tie system like you’ve described here with parts off the shelf, but I don’t think you’ll find that package already made up at Whole Sale Solar. You could give them a call and tell them what you want to do, they should be able to give you a quote on what parts are necessary and what the price would be.
First of all, all golf cart batteries are 6 volt, but the best one is made by Trojan. They are made in California, the model no. Is Trojan T-105. Each one holds 220 amp hours at 6 volts, has 3 cells, and weighs 80 pounds. We only have 4 of them in our hybrid system, really just enough to keep the basic loads in our home running overnight during power outages until the solar array comes back up in the morning. There are other golf cart battery makers, like Interstate for example, but you’ll get the best longevity from a Trojan. Our home has been powered by the wind and sun for 11 years now, we’ve been through lots of batteries in our day, trust me, the Trojan will hold up best. Look in the phone book for a place that sells and services golf carts, they go through batteries by the truckload, that’s where we found ours. There is a great book at the library on battery charging, I’ll list it below.
Our system uses a 1.4 kw solar array made up of Kyocera 120 panels, and has a Southwest Windpower H-40 900 watt wind turbine. The array and turbine all charge our 24 volt battery bank (using 4 golf cart batteries wired in series) through separate charge controllers. The solar array uses a Xantrex digital C-60 controller, and the wind turbine has its own, like most genny’s do. The heart to the system is the Xantrex SW-4024 sine wave inverter. It can stand alone, using battery power to feed AC power to your home, like ours did for years, or tie with the grid and parallel feed, like we have it doing now. The inverter has multiple connections, output, grid connection, generator, battery, and so on. It is programmable to sell/buy from the grid, and automatically switch to stand alone to keep your house running if the grid goes down, as long as your batteries have power. Since you’ll be charging them from the solar panels, this will work fine.
There are probably other inverters today that can do this same thing, but you have to have one labeled, “Utility Interactive.” A utility tie, or, “Grid Tie,” inverter only works with the grid, and a stand alone or, “independent inverter,” only works with the batteries and your loads, but an interactive inverter can do both simultaneously. I’ll warn you that they are not cheap, last time I checked that inverter was a little over $2,000 USD. This is why most of the grid tie systems do not use them, by listing a less expensive grid tie inverter, and then leaving the batteries off the parts list, they can reduce the total system cost by over 30%. It’s up to you what you are willing to pay for.
What I would do first is spend some time educating yourself on all of this. There is a great magazine that gets into the nuts and bolts of this stuff, and has lots of advertisements from vendors like Wholesale where you can shop for prices and kits. Also consider taking the time to get to one of the energy fairs listed in the back of the mag, we did 12 years ago, and this is where it got us today. The magazine liked some of our system so much they ran an article on our place several years ago. If you subscribe, you can check out articles and write ups on lots of peoples homes that work like ours. In the end, you might decide not to get involved at all, and that’s fine, but at least you will be well informed. Good luck Stefan, and take care, Rudydoo
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How to build or where to buy a wind turbine?
I need to build (or buy) a wind turbine that creates enough energy for a small LED light bulb. I used a small dc motor but it only creates between 0.056V and 0.087V. I need to build or buy one that works. I live in South Africa and all I saw were messed up prices for 500kw+ wind turbines. Time constraint till Friday. Please advise.
Best place to go for cheap is to go on YouTube and look up homemade wind turbines. Lots of guys use bicycle generators and car alternators and even make their own generators from magnets and coils of copper wire. They even show you how to make the propellers.
By the way, if you are only getting 0.087V from ANY dc motor, you might have a bad meter. I can get several volts from any DC motor just twisting the axle in my fingers, so something doesn’t sound right with your read there
How to build a wind turbine with cranks?
in physics class we have to build a generator to light an LED light, how do you build a wind turbine with a crank so i don’t have to blow wind at it?
Wouldn’t be a wind turbine then, would it??
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What would give me more power for a cheap home brew wind power system?
Should I build a Vertical Axis or Horizontal Axis Wind Turbine for this? We get a decent amount of wind every year (12 MPH in winter and 8 MPH in summer), the turbine would be no higher than 20 feet. So should i make a VAWT or HAWT? If you say VAWT don’t say ‘because it’s easier’ because I need to get as much power as I can outta this.
The easiest system to build is the vertical type which from the top side looks much like the sign for the astrological gemini ..the capture side is presented to the wind constantly on a simple outer bearing and race..it takes thrust and is called a TDO (tapered double outer) race bearing …the inside presses against a lower TDO and an upper singe cup like your wheel bearing in your car. Vertical units have a better approach height from the wind..take up less space and are not as testy when it comes to turbulence…In 1998 i built a small model based on a design i got from a friend that uses lightweight sheet metal ..We only had a few problems and that was in the collector ring..
Now for the horizontal…it takes up a lot of space..20′ x 10′ footprint..its got no way of responding to the change of wind direction..Unless you build the feeder horn type which captures and diverts the air downward onto primary compression blades…In this case you built a vertical mill and just improperly named it…turbulence from the ground and safety issues ( neighbors dog jumps in) all have an added problem..there are some very odd calculations for the turbine collector and the way the blades a shaped and how captured air is exhausted no to cause a back pressure. Here’s what i found out..Height is 3 times width. Of turbine tube… If the internal fan is 3 feet height is min of 9 feet..12feet is great 15 feet is best. If your going to build this thing from scratch remember to use a massive shaft (hollow) .My favorite is schedule 10 steel 4″ .. Bearings are expensive. Grease is cheaper ..the fan is in a spiral along the shaft the pitch is about 1 turn in twenty
feet. Your selection of generators needs to be a higher value 8% than your actual design load. The transmission if used on a 90deg box should use lightest oil. Every time you add a piece to the drive train you loose power…to best regulate the high speed use a flywheel ..I made one from from a 1″ thick 18″ diameter steel plate it will provide carry over by inertia short cycle and if you want you can attach your MAGNETIC induction tachometer to it…gosh there are so many things in favor of a vertical mill in most applications ..I think its the only way to go…But i am going to guarantee any of these are not tweak free.. No matter the skill or the budget ..Your in a very grey area…With the wind info you sent an 85% eff (during operation) will produce about 2400 watts of power at 120volts parasitic losses can account for 10% mechanical loss for 5 %..In a start up mode expect that it will take 3-5 months to get the mechanics correct. And for the electrics just follow NEC and other codes ..Please find a good slip ring collector. I salvaged the shaft form a broken gasoline welder for mine (250 amp)…all in all its sound like fun wish you were down the street…this was probably more than you wanted for an answer but I just couldn’t resist..Have fun From the E
How does wind energy cause change?
My daughter is working on a project based on wind energy, and she needs to answer this question. So far, all we’ve found on Google is that it causes the climate and local temperature to change. Does anyone have anything additional?
Hi Liliveth, consider these changes: if you invest properly in wind power today and take advantage of any grants and tax incentives, even if your electric rates do not go up as they are forecast too, you will get your money back over time, well within the lifetime of the equipment, and sooner if there is a rate increase in the future. There are also enviromental benefits. At one time there was an argument that a wind turbine will never produce as much power as was used to manufacture it. First of all, this is not correct. The, “Embodied Energy,” in a turbine is earned back in 2 – 6 years, depending on the type turbine, where the raw materials were shipped from, and how it was installed and used in the end. But the argument is not important anyway. We have been living with electricity for over a century now, so it isn’t going away anytime soon. The question is, “What is the best way to produce it?” If you build a turbine, and put it along side a similar sized natural gas fired turbine generator for example, which earns back its embodied energy sooner? The answer is the gas turbine never does, because once you build it, ship it and install it, you now have to feed it natural gas for the rest of its life, so it keeps on digging itself a deeper and deeper embodied energy hole that it can never crawl out of. At least the turbine has a chance to get even environmentally. So manufacturing and using them in the end releases less pollution into our environment. There are other environmental benefits as well, most of these are pretty obvious.
There are also mechanical and political benefits. We all know after the oil embargo of 1973, and the gulf war what it means for our country to rely on foreign oil. Wouldn’t it be nice if we only shipped in 20% of our energy instead of 60% the next time something like that happens? Our home has been powered by the wind and sun for years now, but we still remain connected to the electric grid. Last year alone there were two power failures in our county that lasted about a half day each. In both cases, we were not aware of them because our solar array and wind turbine kept on feeding the house. It’s difficult to put a price tag on something like that. Did you know that there are over 100,000 homes and businesses in the United States alone that use some level of solar and wind power to operate their electrical devices, that’s good news.
Beyond the mechanical, political and environmental benefits however, lies a less obvious benefit, the social benefit. Right now we pump oil out of the ground, and mine for coal. The process of getting those materials to market involves shipping, military escorts and other activities that use up a good portion of that energy as well as putting lives at risk. Jobs in wind power are higher tech than jobs in coal mining, oil drilling and shipping, and there are more of them. Using more solar and wind power would require us to put more people to work, and increase our education base because the work involved requires certain skills. I would personally like to take all those people out of the coal mines, send them to school and put them to work building solar panels and wind turbines. Nobody would have to die again in one of those dark holes in the ground trying to find food for our hungry power plants. They could work on a factory floor where they would not be exposed to coal dust, radon and other toxins and dangers. Most of our solar and wind resources are spread pretty evenly over the middle half of our globe, so everyone has access. This puts people in Bogota on a more equal footing with people in Boca Raton by giving them access to electricity, heat and clean water, and the education to use the resources that provide those things. Oil, coal and natural gas is generally piled up in a few places, such as Russia and the Middle East. This gives those countries and the richer governments that rule them more horse power in bargaining for the other resources of our planet. These are the things that wars are made of.
There are other reasons, but I think you get the picture. For us, renewable energy has become something of a hobby It will probably never save us any real money, utility power in most places is really very inexpensive, but it’s a little like growing your own tomatoes. It’s usually cheaper to buy them at the grocery, but lots of people go to the work and expense to maintain a garden instead. We just grow electrons in ours. If you really want to learn more about the subject, there are some great sources to look into, I will list some below. Here are a couple of quotes you might be interested in: “The path we take today could ease anothers journey tomorrow” Rajendra Pachauri. “The problems facing humanity cannot be solved with the same level of conciousness that created them.” Albert Einstein. Take care Liliveth, Rudydoo
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I want to know the output of the turbines which functions under the action of the wind, and formulates it calc
For example solar towers thermics(solar chimney), as in Australia 1000m; Spain 750 m, I board desired to know the detaile formula to calculate the output of its turbine, to apply to a prototype for example of size different. Thank you very much.
So much will depend on the design and mounting of the turbine generator set, that I don’t believe you will find a good answer. You can look on the Internet and find the stated output of several different turbines available on the market.
How might tidal energy be used in the future?
Tidal power can be used as a means of electricity generation achieved by capturing the energy contained in moving water mass due to tides. Two types of tidal energy can be extracted: kinetic energy of currents arising between ebbing and surging tides and potential energy from the difference in height (or head) between high and low tides. The former method – generating energy from tidal currents – is considered much more feasible today than building ocean-based dams or barrages, and many coastal sites worldwide are being examined for their suitability to produce tidal (current) energy.
The extraction of potential energy involves building a barrage and creating a tidal lagoon. The barrage traps a water level inside a basin. Head is created when the water level outside of the basin or lagoon changes relative to the water level inside. The head is used to drive turbines. In any design this leads to a decrease of tidal range inside the basin or lagoon, implying a reduced transfer of water between the basin and the sea. This reduced transfer of water accounts for the energy produced by the scheme.
Tidal power is classified as a renewable energy source, because tides are caused by the orbital mechanics of the solar system and are considered inexhaustible within a human timeframe. The root source of the energy comes from the slow deceleration of the Earth’s rotation. The Moon gains energy from this interaction and is slowly receding from the Earth. Tidal power has great potential for future power and electricity generation because of the total amount of energy contained in this rotation. Tidal power is reliably predictable (unlike wind energy and solar power).
The efficiency of tidal power generation in ocean dams largely depends on the amplitude of the tidal swell, which can be up to 10 m (33 ft) where the periodic tidal waves funnel into rivers and fjords. Amplitudes of up to 17 m (56 ft) occur for example in the Bay of Fundy, where tidal resonance amplifies the tidal waves.
As with wind power, selection of location is critical for a tidal power generator. The potential energy contained in a volume of water is
E = xMg
where x is the height of the tide, M is the mass of water and g is the acceleration due to gravity. Therefore, a tidal energy generator must be placed in a location with very high-amplitude tides. Suitable locations are found in the former USSR, USA, Canada, Australia, Korea, the UK and other countries (see below).
Several smaller tidal power plants have recently started generating electricity in Norway. They all exploit the strong periodic tidal currents in narrow fjords using sub-surface water turbines.
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What are some companies that build wind turbines?
Name all the companies that you can think of that put together and install wind turbines.
Also, bonus points if you can name a few companies that manufacture the indivdual components.
* power electronics / control system
AAER Systems (Canada)
Acciona Energy (Spain)
Aerostar Wind Turbines (USA)
AN Windenergie (Germany) – bought by Siemens in 2005, now Siemens Wind Power GmbH
A.Ayvazian & Associates (Iran)
Bard Engineering (Germany)
Bonus Energy (Denmark), now Siemens – bought by Siemens in 2004
Clipper Windpower (USA)
Conenergy now Powerwind (Germany/USA)
Dragonfly Industries Inc (USA)
Emergya Wind Technologies (EWT) (Netherlands)
Entegrity Wind Systems (Canada)
Gamesa Eólica (Spain)
General Electric (USA)
Harakosan (Netherlands, Japan)
Heartland energy solutions (USA)
Jacobs, now Wind turbine industries (USA)
Kestrel Wind Turbines (South Africa)
Mitsubishi Heavy Industries (Japan)
Multibrid GmbH (Germany)
NEG Micon, now part of Vestas
Nordic Windpower (USA)
Proven Energy Wind Turbines (UK – Global supplier of 2.5kW, 6kW & 15kW)
REpower (Germany) – bought by Suzlon in 2007
Siemens (Denmark / Germany)
Sinovel (China – PRC)
Southwest Windpower (USA)
SRC Vertical (Russia)
Vestas (Denmark), the world’s largest manufacturer of wind turbines
WES Canada (Canada/US)
Windflow (New Zealand)
What do you call a structure that captures the wind and turns it into energy?
B. Energy Blow
D. Wind generator
E. Wind Sock
It is properly a “wind turbine.”
Vestas, GE, and Gamesa are the three largest manufacturers, and they all call them wind turbines.
A “wind catcher” would catch wind, but not use it to make electricity.
A Energy Blow isn’t describing anything.
A Windmill manufactures SOMETHING with wind–but it may not be electricity. (It might pump water, as in a Dutch Windmill.)
A ‘wind generator’ would make wind. (Think grandpa!)
A “wind sock” is used to determine only the direction of the wind.
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How do i make a Wind Turbine Generator?
Hi, i need to make a wind turbine generator for my science fair project. Links will be appreciated if you know a website with step-to-step diy. thanks so much!
Simple. Jst take a dynamo and a toy fan. Take the wings of this fan and fix it into the shaft of dynamo. Place the fan on the direction of blowing wind.
Please can you explain why the output voltage of a wind turbine generator is proportional to the angular speed?
Please can you explain why the output voltage of a wind turbine generator is linearly proportional to the angular speed of the rotor based on Faraday’s induction law and the definition of magnetic flux?
Please help me i cant find it anywhere
Faraday’s Law states that the voltage produced in a coil, moving relative to a magnetic field, is directly proportional to the number of turns in the coil times the change in magnetic flux per unit time.
V = -n (dB/dt)
In a rotating machine, obviously the number of turns in the coil is a constant. Also, the magnetic field in permanent magnet generators can be considered a constant for this purpose.
What changes when a wind turbine rotor speeds up (or slows down) is the rate of change of magnetic flux per unit time. When the rotor speeds up, the dt in the denominator becomes smaller (it takes less time for the rotor to move a fixed angle). Therefore, the voltage must increase as the speed increases. Conversely, as the rotor slows down, it takes more time for the rotor to move a some fixed angle and the dt in the denominator becomes larger, causing the voltage to drop. If the rotor is stationary then it effectively takes an infinite amount of time for the rotor to move a given angle. If dt becomes infinity, obviously, V becomes zero.
For the pedants out there:
I am aware that I played a little loose with dt vs. Delta t, but for the purposes here I think it illustrates the point well enough
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How does a wind turbine generate electricity?
im making a diagram upon how wind turbines generate electricty
so please help me to like create. i know the wind turns the blades which creates electricity via the generatore. but how does it occur.
what type of energy is used. EG kinetic, thermal?
/thank you xxx
A wind turbine is a rotary device that extracts energy from the wind. If the mechanical energy is used directly by machinery, such as for pumping water, cutting lumber or grinding stones, the machine is called a windmill. If the mechanical energy is instead converted to electricity, the machine is called a wind generator, wind turbine, wind turbine generator (WTG), wind power unit (WPU), wind energy converter (WEC), or aerogenerator.
What can you tell me about wind turbines that move vertically or in a helix shape?
Our town is considering purchasing several of these types of wind turbines. I am on the youth advisory board and we think it will save us time and money as well as a cleaner, more efficient source of energy. Links, videos, and any other information is greatly appreciated as well as your general imput. Thanks!
Overall, do you think this would be an investment or a waste of money. (We would receive grants, fund raise, etc…)
Kinda depends…. Are you getting a contractor to show-up and install it, or is the project being done by locals? That is who is responsible for design, fabrication, installation?
If this is to produce electricity, are the generators a direct to grid design or will there be inverters?
Send me individual email, I’ll discuss this with you, if you are interested…
Given “grant $” this could be a win-win, HOWEVER, has anyone checked on the MTBF figures for the sort of wind plant that you intend to install? There are things that could make this a GREAT investment and there are factors that could end up costing your town a LOT of $ for no benefit at all.
I have no idea, how much or what sort of research has already been done. …. What?
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What are the factors that affect how much electricity a wind turbine generator produces?
What are the factors that affect how much electricity a wind turbine generator produces?
Ignoring the efficiencies of the generator and such….
Where can I find investors to build a small wind turbine generator in Canada?
Global Kinetic Technology Canada is a start up clean energy company. It’s first project is to build a commercial small wind turbine generator prototype in the 1.5 -3.5 kW range using the SEMA technology from GKT USA under an exclusive agreement for Canadian market.
I will need $100,000.00 US for 10% of the company.
Give this a shot – you never know… At the very least you would be on a very popular Canadian TV show and get national exposure…
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what level of efficiency does 2 MW wind turbines run at?
I need to know what level of efficiency a 2 MW wind turbine runs at? So does it only run at 50% efficiency, making it only produce 1 MW an hour?
For the efficiency calculation the formula
Power in wind = (density of air ) x (turbine blade diameter)2 x( velocity of wind)3 x (a constant)
Power in wind = d x D2 x v3 x c
Notice that the power in the wind depends on the density of the air, the diameter of the turbine blades squared (D times D), and the velocity of the wind to the third power (V times V times V). There is also a constant in there which I’ll discuss in the very next paragraph.
What about that constant, C? It’s there because what we are really interested in is the Area swept by the blades of diameter, D. The area is calculated by multiplying the number Pi (approximately 3.14159) times the diameter squared divided by 4. So part of the constant, C, is just the constant number Pi divided by 4 pulled out to show us that the important variable in the area formula is D. The other part of the constant, C, can be whatever unit conversion numbers are needed to make sure the numbers come out right. For now, we won’t go further into that. The point is that the variables that determine the wind power blowing into a wind turbine are air density, blade diameter (resulting in a certain swept area), and wind velocity.
You have probably noted that power (not energy) is dependent on the velocity times itself 3 times (V x V x V). Whoa! In other words, if the wind speed doubles, the power available from the wind increases by a factor of eight. The diameter is significant too. Doubling that increases the power by 4 times. Faster is better, and bigger is better (if you can afford it and can build it strong enough).
Of course, the wind doesn’t blow all the time in most places and when it blows too hard the turbine blades can break or spin so fast they break off (not good when each blade can weigh several tons). In that case, the blades are usually “feathered” to reduce stresses on them and to slow them down. This means we can’t take advantage of really high wind speeds.
If the turbine could convert all the wind’s power to mechanical power we would say it was 100% efficient. But as you probably know, the real world is never so generous. To even achieve 50% is unlikely, and would be a very efficient machine. A 50% efficient turbine would convert half of the power in the wind to mechanical power.
Hope this will solve your problem
For other references
Efficiency Varies with Wind Speed
A given wind turbine has a “design point” that generally defines its peak efficiency at the wind speed for which the system is designed. At wind speeds above and below the design speed the efficiency is the same or less – maybe much less. If a turbine’s best efficiency is 40% at a wind velocity of 9 meters per second (about 20 mph), it will be 40% only at that wind speed. At all other wind speeds it will be something worse. That wind turbine will generally operate at lower than its best efficiency, because wind speeds are never constant or average.
The electric power actually produced will be still lower because the generator efficiencies are also less than 100% (generally in the mid- or low-90’s at best), and there are further losses in the conversion electronics and lines. But this is true of all power technologies. When all these losses are figured in, you might, if you are lucky, be getting 35% or so of the wind’s energy actually delivered as useful electrical energy to the end user in the very best conditions. The average might only be in the twenties.
In the formula above, then, we have to add one more number that I don’t show. That number is an efficiency number that would have to supplied by the manufacturer of the wind turbine, or experimentally determined by you if you make it yourself. It will not be one number, but a variable that is a function of wind speed.
If a permanent magnet motor is used as a generator will it produce ac or dc?
I have a permanent magnet motor that is rated 100v at 2500 rpms. I Would like to know is if I use it as a generator, will it produce altenating current or direct current if I use it in a wind turbine to charge a 12v battery.
It depends. You didn’t say what kind of motor it was. Is it an AC motor? DC?
What configuration is it?
If its armature has a commutator, then it can be configured as a pulsed DC generator and you will need to do the filtering of that waveform. But you may have to make changes depending on the configuration. You need to be more specific. Surely there is model number and manufacturer plate.
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Should Australia increase the use of turbines to generate power rather than relying on fossil fuels?
I would like also like to know if it is possible to run the whole of Australia, or South Australia let alone, only on wind energy, provided that Australia has enough material, money, land and turbines?
We already get our power from turbines, being steam, water and gas turbines. You mean wind turbines I guess. The southern coastline (Great Australian Bight) is a good wind zone I understand, so lets say it will produce 25% of the capacity of the wind turbines over a year. The UK achieves about 23% it is claimed.
Very large turbines are rated at say 5MW and might produce around 1.25MW on average.The size is 65m (each blade) and spaced 5-15 diameters apart, especially considering the row behind receiving the wake. This depends a lot on the land itself, but would look like 120m x 15 = 1.8km spacing which may be best for cost recovery with these very big generators. If the Nullarbor plain is taken as 1000km that only allows a row of 500 along the coast at most, with an average production like 625MW for the whole row. There can be multiple rows, but I have no idea how many are feasible. This whole row is similar to a single large coal fired steam turbine generator (600MW) A steam power station may have several of these. However there are other significant infrastructure issues, like the concrete used amounting to 1300m^3 each, the roads and the electrical distribution needed to cover long distances, how to replace or recycle all this. There is a strong likelihood that the grid needs an on line standby system of the same capacity, as well as a great increase in its carrying capacity in certain areas. This standby can be hydro (there isn’t anything like enough), though pumped storage could be built on some mountains far away (no mountains on the Nullarbor) or a bank of large gas turbines on line using methane or kerosene etc. Steam (coal fired boilers) generally cannot respond to sudden large changes in load if the wind drops.
The Australian production in 2009 was 261 million megawatt hours (second link). One row of generators as above would be around 5.5 million MWh a year, so it needs about 50 rows, stretching 100km inland. I am not sure the wind holds up that far even without 50 generators in the wake of each other.
This is a very rough estimate, but it seems to me it is not a very practical thing at all. Think of wind power as a fuel saver, something that is only useful in specialised areas like the southern coast line. In the tropics with cyclones and little winds otherwise to deal with, forget it, with any current technology. Normal winds are “very moderate”, while cyclones are up to several times the maximum rated speeds, and above the survival speeds. There are certain carefully chosen spots that do have wind generators in the tropics though I suspect these are more about political will than hard economic reality.
In the US estimates are that 20% of energy needs can be met by wind power. Australia could well be less than that. It may be one of the more expensive forms of providing energy, and not so clearly saving anything at all when all things are considered. The first link doesn’t have a positive view on these developments in Wales (UK), where politicians legislated that wind is the in thing. Politicians have law and art degrees. No surprise they make bad decisions about engineering, as they cannot tell who is stringing them along.
The second link might have other info of interest about load variation (change in demand) and aluminium smelters and refineries, and little known facts about the grid which appears to go to about Ceduna at the moment, so only the eastern part of SA is on the grid. WA has its own isolated grids.
The coal stations produce 78% of electricity and 200Mt (megaton) of CO2 a year of the estimated 30-35,000Mt of additional man-made CO2 a year in the world (according to the climate people). Where is the problem, one would ask. We export about 9% of this electricity as refined metals, with stuff like aluminium., and about 3 times as much coal as we use, also used for overseas electrical production in various countries that would be in a difficult position without it.
At present a mix of various energy types seems the best approach, with different situations in different locations. The best argument in favour of alternate energy is sustainability in the long term, but it seems that it will be very expensive compared to coal, close to Australia’s biggest asset. Should we just throw that away? Incidentally the alternative energy to suit Australia might be solar thermal.
Can a convection current turn a power turbine?
I’m curious whether a convection current, like heating through a tube, would be strong enough to turn a turbine that would be able to produce power? (In case you’re wondering, yes I do have an idea in mind, but I don’t know if it’s practicle yet.)
How much of a thermal raise do you think would be needed, and how much of a tube for, let’s say a 1kw generator?
Like the others say, it’s possible.
In June 2006, an agreement was reached to develop a 50MW solar tower generator, in which the sun heats air, which drives a turbine in a chimney, in New South Wales in Australia. The idea is not based on radically new technology. Chimneys with ‘smokejacks’ in which a fan in the hot air turned a roasting spit were certainly in use in the UK in the eighteenth century and probably before. It is well known that a tall chimney produces a better draught, presumably because there is a greater temperature difference between bottom and top, wind speeds are greater higher up, inducing more air to be drawn out of the top of the chimney by Bernoulli effects, and a long distance up the chimney should help hot air build up speed and kinetic energy.
But modelling all these effects and producing an optimally efficient design seems to be almost impossible, at least we have so far been unable to find anyone to take the task on.
If you are using a fluid medium, it could be more possible to make. Implied in your question though, is that we are looking at a vertical model for the turbine since you want to draw on the heat differential between a cold medium and a hot one.
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Can I use electric fan motors as generator?
Here in the philippines air is very windy so i am planning to build a wind turbine.
Yes but you won’t get much current out of it. The wind turbines that you see on top of high poles are huge. They don’t look it from the ground but you could walk around inside them. Also, in order to be practical, you need to hook the generator up to a storage device (batteries) in order to store the electricity (otherwise, you’ll only get current when the wind is blowing). So, it’s not really practical but you should try just for the knowledge of it. Be careful though, you will be working with high voltage and you need to take precautions. The link below is to a wikipedia article on wind power that’s pretty good.
How does wind energy work? I know a little, but does anyone have a clearer idea?
I’ve tried some internet sites, but none of them have given me any real idea of how it works except “It turns the blades and generates electricity”
I am really interested in Wind energy, and how it works. Anyone have a somewhat clearer explanation for me? Thanks.
Wind spins turbines which powers a generator. That’s the easy way to explain it. But if you want to know more in detail:
“Wind power is the conversion of wind energy into a useful form, such as electricity, using wind turbines. At the end of 2007, worldwide capacity of wind-powered generators was 94.1 gigawatts. Although wind currently produces about 1% of world-wide electricity use, it accounts for approximately 19% of electricity production in Denmark, 9% in Spain and Portugal, and 6% in Germany and the Republic of Ireland (2007 data). Globally, wind power generation increased more than fivefold between 2000 and 2007.
Most wind power is generated in the form of electricity. Large scale wind farms are connected to electrical grids. Individual turbines can provide electricity to isolated locations. In windmills, wind energy is used directly as mechanical energy for pumping water or grinding grain.
Wind energy is plentiful, renewable, widely distributed, clean, and reduces greenhouse gas emissions when it displaces fossil-fuel-derived electricity. The intermittency of wind seldom creates problems when using wind power to supply a low proportion of total demand. Where wind is to be used for a moderate fraction of demand, additional costs for compensation of intermittency are considered to be modest.”
Hope that helps you. 🙂
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