Most efficient way to convert rope movement (KE) to rotational KE?

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SUMMARY

The discussion centers on optimizing the conversion of kinetic energy from a moving rope into rotational kinetic energy for a generator. Participants emphasize the need for a detailed description of the system, including the speed of the rope and its load characteristics, to provide accurate guidance. A well-designed belt or pulley system can achieve efficiencies of up to 95%, suggesting that alternative methods may be more effective than using a rope. Additionally, the properties of the rope, such as its resistance to bending, can significantly impact efficiency.

PREREQUISITES
  • Understanding of kinetic energy conversion principles
  • Familiarity with belt and pulley systems
  • Knowledge of mechanical efficiency metrics
  • Basic physics of work and energy transfer
NEXT STEPS
  • Research the design and efficiency of belt and pulley systems
  • Explore the physics of kinetic energy and work transformation
  • Investigate the properties of materials used in energy transfer systems
  • Learn about load characteristics and their impact on energy conversion
USEFUL FOR

Engineers, physicists, and anyone involved in mechanical design or energy conversion systems will benefit from this discussion, particularly those seeking to optimize energy transfer methods in mechanical applications.

narayan821
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I've got a moving rope that turns a shaft, which then turns a generator to create electricity. Please point me to a good resource that guides me to perform this efficiently. I would like to maximize the conversion of kinetic energy of the pulled rope system into rotational kinetic energy of the shaft, and maximize electrical energy output.
 
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I don't think we can answer this unless you describe how the speed of the rope varies with load.
 
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narayan821 said:
I've got a moving rope that turns a shaft, which then turns a generator to create electricity. Please point me to a good resource that guides me to perform this efficiently. I would like to maximize the conversion of kinetic energy of the pulled rope system into rotational kinetic energy of the shaft, and maximize electrical energy output.
This is very vague. We need to see a diagram or get a much better description to know what the system is doing. But it seems like it should be trivial to make it very efficient: a good belt/pulley system can run upwards of 95% efficient.

...however, they aren't really dealing in kinetic energy, they are transforming work. There are situations where kinetic energy may be desired, but without knowing what yours is, I can't say if it is one.
 
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We also need to know the properties of the rope. Resistance of the rope to bending/unbending will be one source of efficiency loss.
 
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Welcome to PhysicsForums. :smile:
narayan821 said:
I've got a moving rope that turns a shaft, which then turns a generator to create electricity.
Why are you using a rope? There's a reason that belts and chains are used much more for this type of power transfer application...
 
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