Which Alternate Energy Vehicle is the Most Efficient?

Posted by Max Dunn Fri, 25 Jan 2008 01:33:00 GMT

There are several better energy alternatives to power cars than using gas. The top ones are hydrogen, air or battery. However, it turns out that there are big differences in the efficiencies of these technologies. For 100MJ of input electricity, this is how far each of these cars could go: [18]

  • 133 km: Lithium-ion battery vehicle
  • 46 km: Compressed air car
  • 42 km: Fuel cell vehicle

So it turns out that battery electric vehicles are 3 times more efficient than either compressed air or fuel cell vehicles!

System Diagram



Compressed Air Car Efficiency



Fuel Cell Car Efficiency



Li-Ion Battery Car Efficiency



[1] Wind-to-Wheel Energy Assesment

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