Methods of rotational energy harvesting and storage

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SUMMARY

The discussion focuses on various methods for harvesting and storing rotational energy, including the use of turbines, electric generators, torsional springs, and flywheels. A notable mention is the pulsed alternator, which efficiently accumulates rotational kinetic energy and converts it into high-current electrical pulses, particularly useful in applications like rail guns. The conversation highlights the challenges of energy loss in air compression and the need for substantial mass in flywheels for effective energy storage. Overall, the participants seek to identify the most efficient methods and available products for rotational energy harvesting.

PREREQUISITES
  • Understanding of rotational energy concepts
  • Familiarity with electric generators and battery systems
  • Knowledge of energy storage mechanisms, including flywheels and torsional springs
  • Awareness of pulsed alternator technology and its applications
NEXT STEPS
  • Research the efficiency and design of pulsed alternators
  • Explore advanced flywheel energy storage systems
  • Investigate the integration of electric generators with energy storage solutions
  • Examine the potential of torsional springs in energy harvesting applications
USEFUL FOR

Engineers, researchers, and developers interested in renewable energy solutions, energy storage technologies, and applications of rotational energy harvesting will benefit from this discussion.

physea
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Hello!

What are the available methods to harvest rotational energy?
I was thinking to put a turbine on the shaft and compress air, but the air will get cold and the energy will be lost.
I was thinking to put an electric generator, which is ok but it needs a battery.
I was thinking to use torsional springs.
I was thinking to use a flywheel, but it must have quite large mass to store the energy.

Are there any other methods to harvest and store the rotational energy of a shaft?
Which would be the most efficient?
Are there any products/systems sold? (apart from the electromagnetic generator).

Thanks!
 
Last edited by a moderator:
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There is a device called a pulsed alternator that is used to power rail guns. It allows the accumulation of rotational kinetic energy over an extended time period with a quick conversion to a high-current electrical pulse when the energy is dumped.
 

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