How can I calculate the energy output from spinning a wheel at a certain RPM?

[ANarwhal]

How can I calculate the amount of energy I would get if I spun a wheel at a certain about of RPM? I know this is a general question, but I am looking for any kind of calculation I can use.

 

[Unrest]

There's a formula for it at the top of this page:

http://en.wikipedia.org/wiki/Rotational_energy

 

[ANarwhal]

Thanks, and what would be a rough conversion of this energy into electrical energy?

 

[russ_watters]

Figure 90% conversion efficiency.

 

[alphy]

There are a few different ways to calculate the amount of energy generated from the RPM of a wheel, depending on the specific scenario and variables involved. One method is to use the equation for rotational kinetic energy, which is 1/2 * I * ω^2, where I is the moment of inertia and ω is the angular velocity (in radians per second). The moment of inertia can be calculated based on the mass and distribution of mass in the wheel, and the angular velocity can be converted from the given RPM. This equation will give you the kinetic energy of the spinning wheel.

Another factor to consider is the efficiency of the system transferring the energy from the wheel to another form, such as electricity. This can be accounted for by multiplying the calculated kinetic energy by the efficiency factor. For example, if the system is 80% efficient, the final energy output would be 80% of the calculated kinetic energy.

Additionally, you may need to consider any external factors that may affect the energy output, such as friction or air resistance. These can be accounted for by using more complex equations and taking into account the specific variables involved.

Overall, calculating the energy output from a spinning wheel involves understanding the factors and equations involved, and accurately measuring and inputting the relevant variables. It may be helpful to consult with a physics expert or refer to specific equations and examples for a more precise calculation.