How much energy do i produce with my dynamo while cycling ?

  • Context: High School 
  • Thread starter Thread starter rusty009
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    Dynamo Energy
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Discussion Overview

The discussion revolves around the energy output generated by a dynamo while cycling, specifically comparing the wattage produced on an exercise bike to that of wind generators. Participants explore the feasibility of the wattage reported and the differences in energy output between cycling and wind energy generation.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant reports generating 138 watts on an exercise bike and questions the validity of this value.
  • Another participant suggests that 138 watts is reasonable for cycling, noting that a professional cyclist can produce around 250 watts.
  • There is a query about why the cycling output seems significantly higher than that of a wind generator.
  • A participant asks for clarification on the type of wind generator being referenced, mentioning a residential wind turbine that can output 400 watts.
  • Another participant points out that wind farm generators are rated in megawatts, implying that the comparison may not be valid if only small wind generators are considered.

Areas of Agreement / Disagreement

Participants express differing views on the comparison between cycling energy output and wind generator output, with no consensus reached on the specifics of the wind generator types being discussed.

Contextual Notes

Participants do not clarify the specific conditions under which the exercise bike wattage was measured, nor do they define the types of wind generators being referenced, leaving some assumptions unaddressed.

rusty009
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I was on an exercise bike in the gym the other day and on the screen it said I was generating 138 watts, and as you can imagine that's a pretty big value,lol. I wasn't cycling that fast either. My question is, is this value possible ?

sorry if this is a bland question but I know a wind generator gets about 100 watts, so I am just trying to get my head around this. Thanks in advance.
 
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Yes that's reasonable for cycling.
One horsepower is 750W, a professional cyclist can produce about 1/3Hp = 250W
 
but how can this number be so much greater than a wind generator ?
 
What do you mean? What kind of wind generator are you talking about? Here's a relatively inexpensive residential wind turbine that puts out 400w.
 
rusty009 said:
but how can this number be so much greater than a wind generator ?
Wind farm generators are rated by mega-watts. You must be referring to a very small wind generator.

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

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