How to specify an electric alternator....

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SUMMARY

This discussion focuses on the specifications and calculations related to electric alternators, particularly in the context of a bicycle-powered heating system. Key calculations reveal that to produce 250 joules of heat in four revolutions of a 24-volt, 45-ampere alternator, a resistance of approximately 9.2 Ohms is required. The conversation highlights the distinction between energy (joules) and power (watts), emphasizing that the alternator's output is contingent on its RPM and load. The feasibility of the proposed project is questioned, with references to thermodynamic principles indicating that the concept may violate the second law of thermodynamics.

PREREQUISITES
  • Understanding of electric power calculations (watts = volts x amps)
  • Knowledge of mechanical power concepts (torque and speed)
  • Familiarity with alternator specifications and performance curves
  • Basic principles of thermodynamics, particularly the second law
NEXT STEPS
  • Research "alternator performance curves" to understand output variations with RPM
  • Study "thermodynamics and the second law" to grasp energy limitations in mechanical systems
  • Explore "electric heating elements" and their efficiency in energy conversion
  • Investigate "Guy Negre's compressed air engine" for alternative energy concepts
USEFUL FOR

Engineers, mechanical designers, and students interested in electric alternators, thermodynamics, and innovative energy systems will benefit from this discussion.

  • #31
Thread has been cleaned up a bit, and the OP is on a short vacation from the PF (not because of the PMM thread, but for something that was cleaned up in this thread).

@Rakesh bhatoa -- Perpetual Motion Machine discussions are not allowed here. Thread will remain closed. From the PF Forbidden Topics lise:

Forbidden Topics said:
Pseudoscience, such as (but not limited to):

Perpetual motion and "free energy" discussions
http://wiki.4hv.org/index.php/Free_Energy_Debunking
http://en.wikipedia.org/wiki/Perpetual_motion
http://www.skepdic.com/freeenergy.html
http://www.skepdic.com/perpetual.html
 

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