EnWheel®

High-performance Kinetic Flywheel Machine

Designed for high-power performance and efficient charging cycles, the EnWheel delivers a durable, reliable energy storage solution.

EnWheel is a kinetic energy storage unit that:

  • charges and discharges in seconds or minutes, with very fast power reaction
  • offers maintenance-free technology with virtually no wear
  • forms permanent storage capacity, independent of charging cycles
  • allows bi-directional power with high C-rates, enabling maximum machine output.
EnWheel®

High Power, Many Cycles

EnWheel achieves a very high level of power storage efficiency through the relentless reduction of friction within the flywheel. Stored within a vacuum, EnWheel uses a contact-free rotor and is made from carbon-fibre-reinforced polymers (CFRP) that optimise its frictionless efficiency.

CFRP, a cutting-edge material, guarantees optimum strength and low weight. Stornetic’s expertise in using this material allows an EnWheel to operate at up to 45,000 revolutions per minute.

This extremely high rotational speed allows to maximise kinetic storage capacity, while only requiring a small machine footprint.

EnWheel® 60

Design Concept

Single flywheel machine EnWheel 60 with DC Drive

Lifespan
Mechanics 20 years + (expected)
Charge cycles 100,000 +
Power electronics ±10 years replacement
Operational Capacity
Name plate power 60 kW
Maximum kinetic energy 4.0 kWh
Effective energy @ 60kWh 2.3 kWh
One-directional capacity 125 sec.
Electrical Data
Input/output voltage 700 to 750 Vdc
Maximum voltage 800 Vdc
Maximum effective power 83 kW peak
Round trip efficiency (typical) 90 %
Response time 10 ms
Mechanical EnWheel 60
Flywheel material Carbon composite
Motor Permanent magnet synchronous
Bearing system Active magnet bearings
Containment Proven safe solid steel
Operational speed Up to 45,000 rev./min.
EnWheel dimensions 450 mm diameter, 1500 mm
Drive cabinet dimensions 600 * 600 * 1800 mm (for 2 EnWheels)
Mounting Upright on special concrete pad
Weight 800 kg
Noise level <50 db
Other Data
Environmentally friendly – no use of hazardous materials
No degradation over lifetime
Best for continuous power cycling
Recyclable material content >90 %
CE-Certification
UL-Certification

EnWheel® 130

Design Concept

Single flywheel machine EnWheel 130 with DC Drive

Lifespan
Mechanics 20 years + (expected)
Charge cycles 100,000 +
Power electronics ±10 years replacement
Operational Capacity
Name plate power 130 kW
Maximum kinetic energy 4.1 kWh
Effective energy @ 130kWh 2.0 kWh
One-directional capacity 50 sec.
Electrical Data
Input/output voltage 700 to 800 Vdc
Maximum voltage 850 Vdc
Maximum effective power 195 kW peak
Round trip efficiency (typical) 90 %
Response time 20 ms
Mechanical EnWheel 130
Flywheel material Carbon composite
Motor Permanent magnet synchronous
Bearing system Active magnet bearings
Containment Proven safe solid steel
Operational speed Up to 45,000 rev./min.
EnWheel dimensions 450 mm diameter, 1500 mm
Drive cabinet dimensions 600 * 600 * 1800 mm
Mounting Upright on special concrete pad
Weight 900 kg
Noise level <50 db
Other Data
Environmentally friendly – no use of hazardous materials
No degradation over lifetime
Best for continuous power cycling
Recyclable material content >90 %
CE-Certification
UL-Certification
EnWheel®

The Benefits of EnWheel®

EnWheel offers many compelling benefits for those seeking a maintenance-free, safe and environmentally conscious short-time energy storage solution.

  • Magnetic bearings suspend the flywheel to enable it to run without wear and retain efficiency over long lifecycles
  • An integrated electrical motor/generator with optimised power ratings spins up to 750Hz in its vacuum
  • EnWheel has been validated to operate successfully at a wide range of temperatures in both test and operational environments
  • EnWheel is environmentally friendly and safe by design, containing no hazardous or flammable chemicals
  • It possesses a high technical salvage value, and is fully recyclable
EnWheel®

Safe by Design

Stornetic believes that safety and quality is essential.

  • Precise numerical simulation of dynamic machine behaviour, material stresses and potential load cases
  • Use of risk assessments and FMEA tools during all design phases and prototyping to identify:
    • potential damage mechanisms
    • potential personal and environmental risks
  • Extensive measures and design features taken to ensure the safety of our flywheels
  • Quality assurance and standardised manufacturing processes
  • Regular product failure tests taken to prove the product safety and to ensure the reliability of the durable
    machine operation.