Flywheel energy storage cooling system

What is a flywheel energy storage system (fess)?

As shown in Fig. 1, a typical flywheel energy storage system (FESS) consists of a flywheel, motor/generator (hereinafter referred to as the “motor”), bearings, sealed chamber, inverter, and auxiliary equipment such as vacuum and cooling devices.

How does a flywheel energy storage system work?

Flywheel Energy Storage Systems (FESS) rely on a mechanical working principle: An electric motor is used to spin a rotor of high inertia up to 20,000-50,000 rpm. Electrical energy is thus converted to kinetic energy for storage. For discharging, the motor acts as a generator, braking the rotor to produce electricity.

Can flywheels be used for power storage systems?

Flywheels are now a possible technology for power storage systems for fixed or mobile installations. FESS have numerous advantages, such as high power density, high energy density, no capacity degradation, ease of measurement of state of charge, don’t require periodic maintenance and have short recharge times .

Is there a thermal network model for vertical flywheel energy storage systems?

This study established a 2D transient lumped parameter thermal network model for vertical flywheel energy storage systems, integrating motor and flywheel heat generation, stator water jacket cooling, and energy & entropy balance equations. The results are as follows: