In this note, we are going to learn about a topic called What is Flywheel Energy Storage System? or Flywheel Storage Cell, also about its Working Principle, Advantages, and Applications. Welcome to Poly Notes Hub, a leading destination for Diploma Engineering Notes for Polytechnic Students.
Author Name: Arun Paul.
What is Flywheel Energy Storage System?
An energy-storage mechanical device is called a flywheel energy storage system or flywheel storage cell. It is made up of a heavy revolving wheel called a flywheel that spins quickly to store energy as kinetic energy. The flywheel stores and accelerates energy that is applied to it, such as through an electric motor. When needed, this stored energy can be released by allowing the flywheel to slow down and convert its kinetic energy back into electrical energy.
In systems where quick response times are required, such as as uninterruptible power supply (UPS), regenerative braking systems in cars, and grid stability applications, flywheel energy storage devices are frequently utilized as short-term energy storage. They have long operational lifespans, quick response times, and high power densities.
Construction of Flywheel Energy Storage System
A Flywheel Energy Storage System usually consists of a few key components. The key component is the flywheel, which is a massive, disk-shaped object that rotates at high speeds. To endure the enormous rotational forces, this flywheel is often composed of materials with high tensile strength and density, such as steel or carbon fiber.
A shaft is attached to the flywheel, allowing rotational energy to be transferred to and from it. Bearings are used to support the shaft and reduce friction, resulting in smooth rotation.
A motor-generator system is used for energy storage and retrieval. When energy is saved, an electric motor accelerates the flywheel, and when needed, a generator converts the flywheel’s rotating energy back into electrical energy.
The complete system is contained in a housing or protective shield to protect the components and assure safety during operation. Control and monitoring systems may also be included to regulate the speed of the flywheel, manage energy flow, and guarantee that the device runs efficiently and safely.
Working Principle of Flywheel Energy Storage System
A flywheel energy storage system or flywheel storage cell works on the premise of storing energy as kinetic energy within a rotating mass. When energy is sent to the system, usually via an electric motor, the flywheel accelerates and stores it by spinning at high speeds. The revolving mass retains the kinetic energy until it is required, at which point the flywheel is connected to a generator and the rotational energy is transformed back into electricity.
This method enables the storage and retrieval of energy on demand. Flywheel storage devices are prized for their capacity to respond fast to variations in energy demand, which makes them valuable in applications requiring rapid energy transmission, such as backup power systems and grid stabilization.
Advantages of Flywheel Storage Cell
Below we listed some advantages of flywheel storage system –
- These devices quickly store and release energy.
- Energy losses are very low.
- The life span of these devices are very high.
- These devices are environmentally friendly.
Applications of Flywheel Storage Cell
Below we listed some applications of flywheel storage system –
- Used in satellites and spacecraft.
- Used in micro grid system to providing energy storage.
- Used for storing excess energy generated by renewable power source.