Wind turbine Definition and 180 Threads

Hello I made a little wind turbine so when it is directed at wind it turns and generates electricity as I can see the outcoming voltage on voltmeter. My question is how can I store its energy? Can I use a rechargable battery and let it run out, then stick copper wires at each sides of it coming...

Homework Statement Homework Equations P=FV The Attempt at a Solution To calculate the mass of wind swept by turbine in a second, I take 2000m2 ×10ms-1×1.3kgm-3.Then, to calculate the force I multiply the answer with 10ms-1. Since they want the power and the yield is 50%. I multiply the...

Hello all my friends...! This is my first discusion about this type of discusion , so let make long short story i read people from 2009 want to find way how to use wind in car producion or self use... I was thinking let me try to find way to get solution on that problem so after long thinking ...

Given a certain sized Savonius Wind Turbine, for example, using a 5 gallon bucket (about 12 inches in diameter and 14 inches tall) cut vertically in half, the standard configuration has the two "scoops" either touching at the central vertical axis, or partially overlapped. Would moving both...

Hi, I have this wind turbine (http://m.ebay.co.uk/itm/251320008073?nav=WATCHING_ACTIVE&skus=Output:12V&varId=550270984212) in the UK, wall mounted about 18ft, its not in the best position, but it still turns pretty fast, enough to hear the blades spinning from inside, and for it to generate...

Hi, I have a 300-400w wind turbine which generates 3-Phase AC @ 12v 33.33Amps Maximum. The wires are colour coded Red, Black, Blue. I have a 3-Phase AC to DC rectifier which can handle up to 1200v @ 50A. Currently I have it connected like so; Red, Blue, Black. I'm wondering, does it matter...

Homework Statement Basically, a wind turbine's connected to a car alternator. weight of turbine=72 kg length of blade-30 cm. What is required, is the amt of power this wind turbine will produce when the car (to which turbine is attached) is moving at: a) constant speed b) variable speed...

So, my proposition is this: (Note that this is a purely theoretical project, and no models/experiments are necessary.) When a car moves forward, wind moves backward, right (relatively). So if we were to attach a small, retractable wind turbine to the side, connect it to the alternator, we could...

Hello, I could use some help determining what size hydraulic cylinder I need to be able to tilt my turbine tower up. What I have is a 70 ft tower where the first 20 feet weigh 2500 lbs, the 2nd 20 weigh 1700 lbs and the 3rd 20 ft weigh 1000 lbs and the last 10 feet weigh 1000 lbs. For a total...

Homework Statement During a sustained wind the blades on a two blade horizontal–axis wind turbine is turning with an angular velocity of 5 rad/s. If initially the blades have an angular velocity of 2 rad/s, determine the distance point P on the tip of the blade has traveled in 3.0 seconds...

my question is would a line of wind turbines have a comparable effect to a wind break in reducing wind velocity

Homework Statement As part of a school project, I'm investigating the optimum blade pitch angle for a simple 6-blade wind turbine, powered by the air flow from a desk fan. I have taken power output measurements using angles in 5° intervals from 0° to 30° and found the optimum to be 20° in 5...

Hi guys something basic that I can't understand: if I have a wind turbine , rotating due to some wind with no load , and no mechanical or drag losses in the blades or in the mechanics (no drag at all, I know its impposible ,but still) , the forces on the blades, create a Moment that accelarate...

Homework Statement Hi guys, I just wanted to verify my calculation of a reynolds number of a wind turbine. I understand that the reynolds number will vary in a spanwise direction along the blade due to changes in the characteristic length(chord width) and velocity(due to the tip speed...

I have often wondered why conventional large wind turbines have evolved with their generators and gearboxes in the nacelle at the top of the tower where they are hard to reach and maintain. Despite this fact, I wish to believe that there may be benefits to a conventional horizontal shaft wind...

Hey guys, I am starting with the course for wind energy and although i have a pretty good knowledge until now , but I am still confused about somethings which i hope some of you will help me to clear :) Q1. Ok ... so why is there a twist in the blade? I mean wouldn't it be much...

Glad it's Friday? I will be if you can help me with this :D : I'm trying to understand an equation about calculating the power extracted by the blades of a wind turbine. I have spent a couple of hours going over it but still not making much more sense. I'm trying to find out why P =...

Good day! I was thinking of building a horizontal-axis wind turbine and testing various blade designs but i can't afford a generator to test the power output of each variation. Is it sensible/possible to get the output without a generator? Can equations in finding torque be used? Thank...

I am making a small vertical savonius type wind turbine and would like some general rule guidelines. I am using 14awg magnetic wire--70 turns (2"oval) and ceramic block 1" x 2" x.375" magnets. I am hoping to get the most power possible at lower wind speeds. Is there a rule that states a...

I am going to design 10 kw, Permanent Magnet, Direct Drive Wind Turbine Generator. The main problem is, how to determine the rotational speed of the Wind Turbine. This is important for me because I have to design the PMG and its rated rpm values...

Homework Statement A wind turbine has a rotor (its rotating section) which has a moment of inertia I = 1.26 × 10^7 \text{kgm}^2. At peak output, with the rotor completing 0.25 \text{ revolutions per second}, the turbine produces a power of P = 3\text{MW}. The tips of the rotor blades sweep out...

Hi I have been looking for some simple equations that describe the turning moments on the rotor as wind direction changes. I know this can be relatively complex but I am looking for simplified equations. Has anyone got any information where I can find these? The wind turbine is a small...

Hi From what I understand as the rotor yaws, there are gyroscopic forces that act upon it and the magnitude of these depends on the speed of yawing (e.g. 10 degrees per second). What happens to the rotor rotational speed during yawing? Does it slow down? Is the aim to slow down the rotor...

Hi - I know someone must have thought of this already, so maybe you can help me understand. When I look at some of these modern wind turbines, the blades seem massively long. I see this lumbering set of blades moving slowly and I imagine that the bulk of the wind does not even touch the...

I can't find anything I can make heads or tails out of so if you guys can help I thank you. I would like to design a wind turbine and be able to get as much power as I can out of each of it's coils. If I start with a magnet that is 1.1811" in Diameter and it is .125" thick with a grade of N52...

First of all, I have read some of the previous posts that related to this topic, but they are closed. I am not looking to solve the world's energy crisis, but I was wondering if there was a way to harness some of the energy given off as friction from the drag of a car. I was looking at some of...

Hello physics forum, I am currently trying to figure out how to pick a generator for a horizontal axis mini wind turbine based on specs. I plan on buying a DC motor to use as a generator with blades directly attached to motor shaft. My goal is for the motor to be most efficient at 25mph wind...

Homework Statement Modern wind turbines can convert up to 30% of the kinetic energy of the incoming wind blowing through their blades to electricity. Assuming that the wind at a proposed offshore location blows steadily at 20 knots, how much electrical power can be generated from a turbine...

With large wind turbines which have AC generators why do they convert from AC to DC and then back to AC before connecting to the grid, why not just connect straight from generator to the grid without converting? Very confused please can someone explain!

Today this guy at work told me that a 2MW wind turbine required 20K ft lbs on the main shaft at 20 rpm. I thought that I had recently read that a 750KW wind turbine might need 20K ft lb torque. I am not looking for exact numbers but which seems correct?

Hello I have designed a vertical axis wind turbine (Savonius) with a 180deg helical twist. It catches the wind really well but the wind power to electrical power conversion is really poor, it is currently only at 4% efficiency. I think the problem is the dc motor that I am using as a...

Hi i am currently doing my dissertation in which i am designing a vertical axis wind turbine design that is a modification of that of a savonius design. A major problem that i am having is being able to predict the torque value of torque for my design in order for me to then predict the...

Suppose I've got a 6mw wind turbine with a very small wing span - 5 meters-, what would the minimum wind speed needed to activate the generator ?

Hello, I am trying to build a SIMULINK model in Matlab in order to determine the RPM of a wind turbine. Can someone please tell me how I can obtain the RPM of a wind turbine from the voltage fluctuations of a generator? Any good sites in the subject are also welcome. Thanks in advance.

This is a question that i am struggling to find any answer to on the internet. Doing some research for my 4th year honours dissertation. I have a wind turbine capable of producing a certain output at say windspeed of 10mph. Meaning that the wind is moving towards the turbine at 10mph...

Nice toy... :!) A recent offshore wind turbine. 6MW peak power, the rotor has 120m or 154m diameter :-p The alternator rotates at the blades' speed, without a gearbox... With D=6.5m, it uses permanent magnets, its stator must be actively cooled, and the nacelle weighs 200t. Still not my...

Homework Statement Hi all! I am been working on an EEI. Basically I recorded the power output (P=VI) of a wind turbine with the blades at different angles. I went from 0 degrees (flat) to 180 degrees in 15 degree increments. Averaging the data I see a graph like this: Also, just to...

I am attempting to size a wind turbine generator where the torque available is 8,000 Nm's. Can anyone save me doing the calculations? Regards AV8TUR.

Hello, Can some explain to me how to calculate the power coefficient of a vertical axis wind turbine. If you explain the steps invloved would be great or any external file location where I could refer. I have below information 1) Lift Coefficient. 2) Drag Coefficient. 3) Angle of...

Ok I have a design project that I am working on for the University this semester. Having a bit of problems trying to figure out and issue revolving around the wind force on our savonius blades. We are trying to make sure our blades will rotate with a wind speed of 10 mph. We have the blade total...

Hello, As wind speed rises, the power output of wind turbine also rises. However, after it reaches a certain value (rated power), it levels off, i.e., it doesn't increase any further. According to my teacher, there is a limit to the power generation capability of the generator and hence...

Hello, I am construction a floating wind turbine model which is going to be used in a wave tank experiment this fall. Currently I'm looking for a mooring line for this model. The line will go from the wind turbin down to the bassin floor, where it will go through a pulley and back up to...

Hi! I'm doing my master thesis about designing a offshore wind turbine tower for subarctic conditions and I have a major problem with units I'm not much familiarised with Ansys, so I use Ansa as preprocessor and launch the solve in Ansys The problem I have is in units. I'm using Ansys...

If we look at wind turbines used for power generation, they typically have 3 blades, and the blades are very slender compared to the blades of a house fan. I don't understand how such a slender blade can capture a significant amount of the wind's energy. The energy available in the wind is...

Hello everyone, Now i am trying to model wind turbine blade using solidworks. I have the airfoil coordinates at each section of the blade, but the coordinates are distance per chord (x/c,y/c) so i have to scale it using the calculated chord. When i scale it with respect to the origin -...

Homework Statement I need to find how much energy will be produced (at least approximately) at a site with the following characteristics (this is taken from the German Renewable Energy law): “The reference site shall be a site determined by means of a Rayleigh distribution with a mean...

density=1.2041 kg/m^3 Power 1.65 MW Rotor radius (blade length) = 37m calculated swept area = 4,301 m^2 wind speed 12m/s the rotor speed range is upto 20rpm i want to calculate the torque but not quite sure how to go about it Thanks for any help!

please excuse the writing in some of these messages as I am typing this from my phone, but I am looking to build a high output wind turbine. I have a few questions. I am a high-school senior and have a large understanding in physics. my idea involves a 12 wing rotor as wind speeds are low in...

I am building a "Tiny Home" on an old camper travel trailer. I am using all recycled materials and any leftover building supplies I can find. I am going to use solar power to generate most of my electric power (lights, outlets, etc.). I am considering using a hybrid system and utilizing wind...