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[Phys-l] Thermal energetic performance of vehicles



While developing an electric bicycle, I attempted to compare energetic performance of vehicles. Using SI units and multiplying thermal efficiency by speed yields a performance parameter expressed in seconds. A very similar parameter (differing by a factor of g) was described over 20 years ago, but it was applied as a limit for all vehicles and not as a general performance parameter. Using mass rather than weight makes the parameter more useful and understandable, in part because it becomes twice the cruising payload kinetic energy divided by thermal power expenditure. A complete analysis is at the following pages:
http://www.neodymics.com/green.htm
http://www.neodymics.com/Images/EPPaper071013C.pdf

Best Regards,
--
Jeff Radtke
jr@cloudchambers.com
www.cloudchambers.com
www.neodymics.com