Velomobile, an example of an energy efficient mean of passenger transport. Energy efficiency in transport is often, and confusingly, described in terms of fuel consumption, in10tion forex cargo consumption being the reciprocal of fuel economy. Nonetheless, fuel consumption is linked with a means of propulsion which uses liquid fuels, whilst energy efficiency is applicable to any sort of propulsion. Nonetheless, several conversions are applicable, depending on the unit of distance and on the unit of energy.
Velomobiles have the highest energy efficiency of any known mode of personal transport. A standard lightweight, moderate-speed bicycle is one of the most energy-efficient forms of transport. Electric pedal-assisted bikes run on as little as 1. This last can be significant given that walking requires little or no special equipment, while automobiles, for example, require a great deal of energy to produce and have relatively short lifespans. A second important consideration is the energy costs of producing energy. Bio-fuels, electricity and hydrogen, for instance, have significant energy inputs in their production. A third consideration to take into account is the occupancy rate of the vehicle.
As the number of passengers per vehicle increases the consumption per unit distance per vehicle increases. However this increase is slight compared to the reduction in consumption per unit distance per passenger. We can compare, for instance, the estimated average occupancy rate of about 1. Finally, vehicle energy efficiency calculations would be misleading without factoring the energy cost of producing the vehicle itself. This initial energy cost can of course be depreciated over the life of the vehicle to calculate an average energy efficiency over its effective life span. On a percentage basis, if there is one occupant in an automobile, between 0.