Design a flywheel for my final year project

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Discussion Overview

The discussion revolves around the design of a flywheel for an electric bicycle project. Participants explore various aspects of flywheel design, including power requirements, energy storage calculations, material selection, and potential impacts on bicycle performance.

Discussion Character

  • Exploratory
  • Technical explanation
  • Homework-related
  • Debate/contested

Main Points Raised

  • One participant suggests determining the power requirement of the flywheel and the duration for which it must deliver power, proposing a formula for energy stored in a flywheel.
  • Another participant confirms the power requirement as 0.5 hp for a maximum of 1 hour and seeks assistance in calculating the mass and dimensions of the flywheel, as well as material selection.
  • A participant provides a link to basic formulas for flywheel energy storage and suggests starting with a solid steel cylinder for simplification, noting the need for high initial spinning speeds.
  • One participant expresses the intention to attach a gear setup to the rear sprocket and connect the flywheel to charge batteries, detailing the expected RPM range.
  • Another participant emphasizes that providing a detailed design is the responsibility of the project creator and not the forum members.
  • Concerns are raised about whether the flywheel might cause steering and control issues, with one participant dismissing this concern.
  • A participant inquires about the coefficient of fluctuation and its relation to flywheel shaft speed or gear speed.
  • Another participant reiterates the concern about design challenges, specifically asking how to calculate the CS value.

Areas of Agreement / Disagreement

Participants express various viewpoints on the design and implications of the flywheel, with no consensus reached on specific design parameters or potential issues related to steering and control.

Contextual Notes

Participants mention various calculations and assumptions related to energy storage, material selection, and design parameters, but these remain unresolved and depend on specific definitions and conditions.

Who May Find This Useful

Students and hobbyists interested in mechanical design, particularly in the context of electric bicycles and energy storage systems.

dinesh sivam
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hi friends,i am going to design a flywheel for my final year project.how to design it? actually my project is electric bicycle.i am going to connect fly wheel with gears.my cycle will power by both manually & electrically.
 
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First determine the power requirement of the flywheel (maybe 1/2 hp or so). Then determine the time the flywheel must deliver power. After this, determine the stored energy in the flywheel: Energy = Power X Time.

With the energy requirement, find a formula for energy stored in a flywheel. Then you can optimize dimensions, materials, angular velocity, and so on.
 


thank you.power requirement is 0.5 hp and time maximum 1 hr.i can find energy stored and how to calculate mass and dimension of fly wheel? help me pls..and how select material also...
 


This link gives some basic formulas for flywheel stored energy:

http://en.wikipedia.org/wiki/Flywheel

To simplify the calculations, start with a solid cylinder made of steel.

You will find it will need to initially be spining very fast to make 1/2 hp for 1 min. You may need to reduce the power and time.

I would set up the equations in MathCAD or Excel.
 


k thanks
 


hi, i tell all about it. i ll attach gear setup in rear sprocket.and fly wheel connected to gear arrangement. we attach generator to charge batteries.our gear setup give as 3500 rpm and that shaft connected to flywheel k.max speed 3500 and min 1000.we use hub motor for front wheel and we use both manual and electric .we charge batteries for hub motor.give me detailed design for flywheel. please!
 


This is your project! We most certainly will not give you a detailed design!
 


k.i ll try
 


Do you think your flywheel might cause problems with steering and control?
 
  • #10


no sir
 
  • #11


sir wat ll be the co-eff of fluctuation value sir??for co-eff of fluct calculation wat is min and max value?is it fly wheel shaft speed or gear speed?
 
Last edited:
  • #12


Phrak said:
Do you think your flywheel might cause problems with steering and control?

no sir.but i have problem in design itself .how to calculate cs value?
 

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