Researchers propose evaluating alt fuel efficiency based on energy rather than volume; impact of ethanol on vehicle efficiency and GHGs
Green Car Congress
MAY 17, 2013
converted all vehicle efficiency measurements into vehicle energy efficiency (VEE, km/MJ) based on fuel energy densities reported in each study. Standard deviations increase by >10% and >200% when used in high and low blends, respectively. Most of the studies expressed vehicle efficiency in various volume-based units.
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