Wind turbine Definition and 180 Threads

I have read some of the responses to the question of why a wind turbine would not be a useful source of energy for a car. Why could it not be used as a supplemental source to extend travel?

Homework Statement Homework Equations P = 0.3*rho*A*V^3 F = 0.44*rho*A*V^2 From what I know that may help: Shear Stress (Torsion) = T*radius/(Moment of Inertia) The Attempt at a Solution When we were given this problem no one in the class had the slightest clue how to...

Dear All, I'm in a bit of a pickle. I have recently booked out the local wind tunnel in order to run some simulations on three home made model wind turbines. I am aware of how to theoretically calculate the available power (0.5*p*A*V^3) and that P=Tw (Torque * Angular Velocity). Angular...

It is a puzzle to see so many of the wind turbines that are idle. Even in active wind farms, such as at Altamount Pass, it is usual to see at least 20% of the turbines idle. Older installations are usually idle as well. Why is this? Hydraulic turbines routinely run flawlessly for decades...

Hello, a friend of mine has a "revolutionary" idea about harvesting wind power by using a "translational turbine". however, it all sounds silly to me. this is what it should look like: is this a good idea for a wind "turbine"?

Homework Statement Hi I need help in calculating the forces on a domestic wind turbine that is retracted/extended by a hydraulic ram. It is very simular to the following photo: I need to calculate the forces at the hinge and where the ram attaches. I have all the relevant dimensions and...

can anyone help how to build small wind turbine system to generate 2KW power using MATlab simulink..??

Hello everyone, I've found these forums extremely helpful in the past and I've decided to create an account in order to answer a question that has been going in my mind and I can't seem to find the answer. The power a wind turbine can generate can be derived from the equation: Power =...

I understand that in theory one can adjust the blade pitch or the speed or the yaw to control a wind turbine. Every time I do a search on turbine control this is all I come across. However I want to ask the question at a more "actual" level. What actually happens. Do they use PI control...

i don't know if i am in right part of forum. i want to build some sort of wind turbine for a school project. all the diy project are 6 or 9 coils with 8 or 12 magnets. the coils are on non magnetic board and the magnets on steel plate. why on steel, the steel plate increase the total...

Hello All, I'm currently in the process of designing a numerical model for a vertical axis wind turbine, more specifically, a straight blade giromill. I'm currently having trouble because depending on the variables I choose, I can produce more power than available from the wind. My...

Belts and pulleys for WIND TURBINE ? Hi, I have been working on a Vertical Axis Wind Turbine. The blades I am able to fabricate produce more torque than speed. I am adding a synchronous belt drive transmission. The current configuration is 1 rpm at the input and 7 rpm at the output. I have...

I'm building a yaw control system for one of the universitys VAWT turbines. I need to design a slewing bearing which can reliably support radial, axial and tilting moments. I have absolutely no idea how to do this or even where to start. Could you please give me some advice as to go about...

I was reading an earlier post about having a wind turbine embedded in a vehicle to generate electricity as it moved. I came to this site after having this thought last night. But I realized immediately that drag and weight would be counterproductive. However, I did ponder an alternative...

What does happen to the wind after it passes through a wind turbine blade? Does it increases the wind speed?

Hi everyone! I am new in physics forum and this is my first post. I need help from the people out there. I wanted to deisgn a Vertical Axis wind turbine to produce 5k Watt output with a frequecy of 50Hz, 220VAC, to completely run my home appliance 24 hours. Appliances include: -1.5ton...

hey! Wind turbines have got certain threshold speed of wind (of about 6-7 m/s) which acts as a mechanical resistance to its rotation. Is this mechanical resistance a result of frictional resistance in bearings alone, or it is also a result of its own weight? If yes, approximately how much...

I recently read this http://www.earthtechling.com/2011/06/wind-turbines-board-europe-ferries/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+Earthtechling+%28EarthTechling%29&utm_content=Google+Reader" and it's really bugging me. They claim that by putting wind turbines on the...

http://www.sauerenergy.com/index.php?option=com_content&view=article&id=50 The link above gives a picture and rough model of a Sauer Wind Turbine. I was wondering, since the dimples on the turbine were based on the idea that a golf ball reduced air resistances, how it would help the wind...

Homework Statement A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.127 rad/s2. After making 2790 revolutions, its angular speed is 155 rad/s. (a) What is the initial angular...

Homework Statement Air of density 1.2kgm-3, speed 8ms-1 is incident on blades of wind turbine. Radius of blades 1.5m. After passing blades, wind speed is reduced to 3.0ms-1 and density 1.8kgm-3. How much power is extracted from wind?Homework Equations P=1/2 pAv3The Attempt at a Solution P=1/2 x...

Hello all, I am not an engineer, but I am a 32 year steel fabricator, I have recently built a 17 foot wind turbine with an axial flux alternator, I would like to build a tower for it but would like to get a general idea before I go to a local engineer for actual stamped drawings which are...

Hello. The title of this post may seem too hardcore. Actually, I am building a simple wind turbine made from wood and aluminium thin plate. it has three blades and 120 cm in diameter. It should be at least 3.5 m above ground, on a steel/wood column. I have no idea how to install this pole...

Homework Statement I am trying to determine the input I will have on a shaft with a continuous force of 3,720 pounds one foot out from the shaft center. I am thinking the input continuous torque would be 1 foot being that I am using a 2 foot pulley on the shaft, and I have a continuous...

My Semester Project Is "Dynamic Analysis of Wind Turbine Blades" In ANSYS 9 Environment ... I've Modeled Wind Turbine 'Rotor Assembly' In Pro|Engineer And Successfully Imported Into ANSYS ... I've Practiced 'Static Analysis' Only In The ANSYS Environment ... So It Leaves Me With A ZERO-LEVEL...

Hi I wasn't sure whether this is technically homework or not but anyway. I am building a miniature wind turbine for a basic project just for myself. I was wondering if there was anyway for working out the voltage gained from the generator. I know this could be gained from using P = IV but...

Homework Statement My son and I have built a wind turbine following the plans on: Build your own Wind Turbine Designed by Dave Mussell http://www.re-energy.ca/docs/wind-turbine-cp.pdf" . These plans were inspired by the Picoturbine: link to manufacturer and link to PDF. We used 30 AWG...

We are looking to effectivley build a wind turbine to capture the wind and create energy. What would be the most effective and easisest way to construct the windmill? I would like to focus on the design of the blades themselves. What design of the blades would provide maximum support and...

Hello. Let me make something clear right away, I don't think perpetual motion is possible. However, whenever I look into wind-turbines/cars I find forums bashing some young person for asking why we don't strap a windmill to the top of our cars. Obviously that wouldn't be an efficient way...

How do i develop a wind turbine model for electricity generation.

Homework Statement Model a 1KW windturbine. Homework Equations in this link u will find the equation (its equation 2-3) for a fit for a cp(lambda,beta) curve. It has 6 coefficients. The coefficients given are particular to a 1.5 MW windturbine. Does anyone know where I can find any...

hi!... Does anyone know the relationship (i mean formulas) relating to the incoming air velocity to the rpm of a wind turbine?..i need to have a design in the generator part and also the parameters of the propeller..thanks! best regards, :)

Could a small ducted fan / wind turbine say 4 -5 inches in diameter placed in the wind stream of a car develop enough energy at freeway speeds ( or less ) to help charge the cars battery at a realistic level say 30 to 75 amps 12v? I am thinking along the line of a duct from the front grill area...

how do we find the natural frequency of a tower of a wind turbine if, say, the tower is circular hollow cross sectional shape (its not tapered or anything, just cylindrical all the way up). I think i know how to find it when we're ignoring its weight, but what is it when weretaking into account...

I have a basic question on how the power efficiency of wind turbine affected by the gear ratio. Suppose there is a generator connected with the rotor through a gear enhancer, a higher angular speed of generator is obtained. Since a higher voltage is produced, we may think that the power...

I was talking on another forum about an idea someone proposed. They said if you put a miniature wind turbine as a Hood Ornament on a car, as the car drives, it would produce extra usable energy. I said this would not work as if the wind is not blowing at the correct angle and velocity then...

Hi guys, I am working on designing a wind turbine spar for a second year mech project. The spar has an elliptical cross section, is hollow and linearly tapered with a linearly varying wall thickness. The entire tower reaches upwards at angle. My question is: if I want to find out the...

Hello, Im new to the forum, i joined to ask a question about a boat I've been obsessing about for awhile. My idea is an aluminum sail boat (27-40') that has its mast removed and replaced with say a 3-4kw vertical wind generator (350lb) i know that's a bit heavy but I am sure the wind forces are...

Hi there... if it is of interest to anyone. I just completed a wind turbine blade design and simulation software fully integrated into the GUI XFLR5 of Mark Drelas XFOIL. If you want to try it out check: qblade.de.to cheers David

anything big like it costs more then 15 million and some how it has made or is attempting to make a significant contribution to the field of physics. If it's happening in Canada then that would be most preferable and helpful but if it's taking place in a different country then that is good too...

my dessertation topic is optimum wind turbine blade design with xfoil. and the aim of this project is to find a series of airfoil that gives a good efficiency and also how the angle of attack changes with rotation...pls has somebody got an idea about...and also how best can i start this...

Consider a wind turbine placed alongside a road in a location with no wind. If a vehicle drives past (without loss of generality, at a constant speed) the turbine will spin and electrical power can be produced. The power produced is obviously supplied by the vehicle. As compared to the case...

Hi, I'm currently trying to design a wind turbine for a college project. I know the ideal equation for power is (mass x area x velocity cubed)divided by 2. Is there anyone who could help with equations relating the power output to the number of blades and angle of the blades. Thanks

Hello. I'm calculating the different parameters of a turbine design but I have some trouble with the solidity. The solidity near the hub exceeds 100%, but is an average of ~27% for a 6 bladed turbine. I'm just wondering if anyone has had experience in turbine design and if +100% solidity is...

1. Wind turbine produces 8MWatts (If wind speed is proportional to the 7th root of altitude) (Wind power is proportional to the cube of wind speed First the turbine is at 450ft then reconstructed at 650ft, how much faster is wind speed? and how much more power?2. Sw= 7√Altitude, Pw= (Sw)33...

Hi! I’m a 4th year student at mechanical engineering. I have been asked to design a kit that can be installed in a car/vehicle which can be used to recharge the car's battery or connected to some of the car's/vehicle's component to power them. Where and how do I start? Does anyone have a...

I know this question was already asked but I wanted to tackle it from a different angle. I saw allot of posts on how it would take too much gas to create the energy from the turbine but for the example let's say the car is electric. Now say we have a system where the turbine is in a...

Homework Statement I did an experiment on a wind turbine simulator I'm am doing an assignment and I need to draw up a prediction on what I think will happen I am trying to find a Formula where I can put in the input values ie 1500rpm, Excitation voltage, Hz .so that I can put in these...

Hi, I am a Mechanical student, currently at my final year so I am to do my FYP aka Final Year Project with the title of hybrid power generator (solar + wind). My friend is in charge of the solar part while I am to design a vertical-axis wind turbine. I am clueless about from where should I...

we need to make a wind turbine using this motor http://www.kidwind.org/xcart/product.php?productid=15&cat=79&page=1" the rules can be found here: http://www.mrmaloney.com/nssl/events/2009-2010/0910_4-jan-wind.pdf" We were thinking, since they will be using P=(I^2)R instead of P=IV to...