Energy Savings: Cycling vs. Driving
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What energy savings could be achieved if an extra 1000 people cycled to the work each day, as opposed to driving?
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The expert examines energy savings for cycling versus driving.
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Problem:
What energy savings could be achieved if an extra 1000 people cycled to the work each day, as opposed to driving?
Solution:
According to the statistic data (see for example http://en.wikipedia.org/wiki/Fuel_efficiency_in_transportation), a cyclist riding at 16 km/h needs about 110 kJ/km. This is consistent to a consumed power of
( 1)
where consumed energy per kilometer of riding.
Remark: The useful power achieved by the rider is much smaller, considering the efficiency of the biomechanical energy conversion; if we estimate, for example:
then the useful power will be:
...
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