1. What is Flywheel Energy Storage?

Flywheel energy storage systems store kinetic energy in a rotating mass. The amount of energy stored depends on the moment of inertia of the flywheel and its angular velocity.

2. How Does the Calculator Work?

The calculator uses the flywheel energy equation:

Where:

• \( E \) — Energy stored (joules)
• \( I \) — Moment of inertia (kg m²)
• \( \omega \) — Angular velocity (radians per second)

Explanation: The energy stored is proportional to the moment of inertia and the square of the angular velocity.

3. Importance of Flywheel Energy Calculation

Details: Accurate energy calculation is crucial for designing energy storage systems, determining storage capacity, and assessing system performance.

4. Using the Calculator

Tips: Enter moment of inertia in kg m² and angular velocity in rad/s. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is moment of inertia?
A: Moment of inertia is a measure of an object's resistance to changes in its rotation rate, depending on mass distribution.

Q2: How to convert RPM to rad/s?
A: Multiply RPM by π/30 (1 RPM ≈ 0.10472 rad/s).

Q3: What are typical flywheel energy densities?
A: Modern flywheels can store 10-130 Wh/kg (36-468 kJ/kg).

Q4: What affects flywheel energy storage?
A: Material strength, rotational speed, and bearing friction are key factors.

Q5: What are advantages of flywheel storage?
A: High power density, long lifespan, rapid charge/discharge, and minimal environmental impact.