What are Flywheel Energy Storage Systems?

Flywheel Energy Storage Systems are interesting solutions for energy storage, featuring advantageous characteristics when compared to other technologies. Research focuses on cost aspects, system reliability, and energy density improvement for these systems. In this context, a novel shaftless outer-rotor layout is proposed.

What is the cost of Flywheel storage?

The cost of a 25-kWh Flywheel storage system ranges from $4,,015 to $7,,400. The cost of battery storage is from $3,,972 to $8,,700. The efficiency of a Flywheel system is 73 percent compared with 65 percent for a battery system.

Are flywheel batteries a good energy storage system?

Flywheel batteries are probably the most compact energy storage systems that can be designed with the lowest environmental impact and highest durability. Not quite domestic, but the technology keeps maturing. It's better suited for leveling short-lived and massive power needs rather than storing energy for days (note the 7%/hr loss below).

What is the Flywheel Energy Storage System (FESS)?

The Flywheel Energy Storage System (FESS) is a technology developed under collaboration between GKN and Dstl to demonstrate an energy storage option for the Royal Navy’s most advanced ships. It is based on Le Mans motor-sport technologies and was originally developed by the Williams F1 team.

How much energy does a flywheel store?

It would probably have to be in a cement enclosure, and in Florida a sump pump to keep it dry. A 1,000kg, 5m, 200RPM flywheel would store 685,567J of energy if it was shaped like a disc. That's 0.19kWh of energy — enough to boil the water for about seven (7) cups of tea or run a typical airconditioner for about 10 minutes.