What Is The Speed Of Wind Turbines? 

speed of wind turbines

Did you see the wind turbines? Well, this article is all about the speed of wind turbines. While traveling, you might have seen a white-colored, big, fan-like structure installed on the hills, rotating due to air, through your car’s window. If you don’t know about this, we will tell you. This is called a wind turbine that is used to generate electricity from the air. It is installed on the hills to get high-intensity air. When you observe the wind turbines then you can get that, the wind turbines do not move at uniform speeds but at different speeds. It is because their speed completely depends upon the wind. Let’s have a look at the speed of wind turbines

What Is The Speed Of Wind Turbines? 

The speed of wind turbines is between 10 and 20 revolutions per minute. Here the unit is the revolutions per minute because the speed of the wind turbines is circular speed and not linear speed. Does the speed of the wind affect wind turbines? Let’s understand this. To push or spin the wind turbine the minimum wind speed required is generally between 12 and 14 km/h. Still, it does not move the wind turbine at its full capacity. But strong winds with a speed of 50 to 60 km/h lead to generating electricity at full capacity. And if the speed of wind goes beyond 90 km/h, then turbines must be stopped to avoid damage. Now, you have cleared a very common question, do wind turbines operate with any speed of wind? Let’s know some other speeds of the wind turbines, 

  • The maximum wind speed for wind turbines is 90 km/h. 
  • The wind turbine speed rpm is between 10 and 20 revolutions per minute
  • The top speed of wind turbines is 80 m/s or 180 miles per hour. 

Now, you know how wind speed affects the efficiency of wind turbines as well as what is the maximum speed for wind turbines. Let’s know the calculation of the speed of the wind turbines. 

Calculate The Speed Of Wind Turbines 

The rpm speed of the turbine, considered a three-blade turbine, is dependent on 3 parameters namely rotor diameter, wind speed, and tip speed ratio. So, to calculate its speed you need to know the formula of rotational speed which is given below, 

The speed of wind turbine (w) = (60 x V x TSR)/(D x ℼ) 

Where, 

w = is the rotational speed of the wind turbine in rpm 

V = is the speed of wind in m/s 

TSR = is the tip speed ratio 

D = is the diameter of the rotor 

While solving problems you need to calculate TSR first by using a formula, 

TSR = Blade tip Speed/Wind Speed in mph

For a three blade wind turbine, it is around 6. 

Let’s consider an example to understand the above-mentioned formula. 

A wind turbine whose rotor diameter is 10 m, with a power of 20 kW and an average wind speed of 9 m/s is rotating at a rotational speed. What is the speed of a wind turbine? 

So, by using the formula, 

The speed of wind turbine (w) = (60 x V x TSR)/(D x ℼ) 

                                                = (60 x 9 x 6)/(10 x 22/7) 

                                                = (36 x 7)/22 

                                                = 11.4545 rpm 

About The Wind Turbines 

A wind turbine is a machine or a structure that converts wind energy into electrical energy without causing harm to the environment. It uses aerodynamic force from the rotor blades, which work like an airplane wing or helicopter rotor blade. 

When wind flows across the blade, the air pressure on one side of the blade decreased. The difference in air pressure across the two sides of the blade creates both lift and grad. The force of the lift is strong that the drag and this causes the rotor to spin. The rotor is connected to the shaft of the generator. Once the generator shaft started moving the electricity get generated. To protect the wind turbines from the heavy wind there is a gearbox at the bottom of them. To control the speed of the rotor you can use a series of gears that speed up the rotation or speed down the rotation. 

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FAQ

What Is The Speed Of A Wind Turbine?

Most of what you would call large-scale wind turbines typically start turning in winds of seven to nine miles per hour. Their top speeds are around 50-55 mph, which is their upper safety limit. Large-scale wind turbines normally have a braking system that kicks in around 55 mph to prevent damage to the blades.

How Fast Do Windmills Spin In Mph?

When you consider the typical blade length for wind turbines, you see that the tip of the blade would easily go as fast as 100 mph to 180 mph depending on their RPM. A safe short answer to the question of “how fast does a wind turbine spin” would be “something around 100 RPM an up”!

Do Windmills Move Fast?

Wind power is generated by the force wind exerts on the blades of a turbine, causing the turbine’s shaft to rotate at a speed of 10 to 20 revolutions per minute (rpm).

Do Windmills Spin All The Time?

Why do the turbines not spin at times? The most common reason that turbines stop spinning is because the wind is not blowing fast enough. Most wind turbines need a sustained wind speed of 9 MPH or higher to operate. Technicians will also stop turbines to perform routine maintenance or repairs.

Conclusion 

By reading this article you got the answer to what is the maximum speed of a wind turbine as well as how to calculate it. A wind turbine is a machine that converts kinetic energy from the wind into electrical energy. It is considered one of the cleanest ways of generating electricity. You can see, at the thermal power plant they used radioactive elements to generate electricity, hence there is radioactive element waste which causes harm to surroundings. But, in the wind turbine there is no harm to the environment but in this birds get dead by hitting the blades of the wind turbine. The efficiency of wind turbines is lower than thermal power plants because of fluctuating input. Now you know all about the speed of wind turbine