Browse Publications Technical Papers 640649
1964-01-01

Comparative Performance of Alcohol and Hydrocarbon Fuels 640649

Three factors are of consequence when considering the comparative performance of alcohols and hydrocarbons as spark ignition engine fuels. These are: relative amounts of products of combustion produced per unit of inducted charge, energy inducted per unit of charge, and latent heat differences among the fuels. Simple analysis showed significant increases in output can be expected from the use of methyl alcohol as compared to hydrocarbon and somewhat lesser improvement can be expected from ethyl alcohol. Attendant increases in fuel consumption, disproportionate to the power increase, can also be predicted.
More sophisticated analysis, based upon thermodynamic charts of combustion products, do not necessarily improve correspondence between prediction and engine results.

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