Research Article
Effect of Ethanol Content on Thermal Efficiency of a Spark-Ignition Light-Duty Engine
Table 2
Gasoline, ethanol, and tested blends main characteristics.
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| A/F | LHV | ρ | Ethanol | C | H | O | gCO2/MJ
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| kg/kg | MJ/kg | kg/m3 | % mass | % mass | % mass | % mass | g/MJ | MJ/kg | kJ/kg |
| Gasoline | 14.32 | 42.5 | 750 | 0 | 85 | 13 | 1 | 73.4 | 2.77 | 400 | E10 | 13.77 | 40.9 | 754 | 10 | 82 | 13 | 5 | 73.3 | 2.77 | — | E20 | 13.22 | 39.3 | 757 | 20 | 78 | 13 | 8 | 73.1 | 2.76 | — | E30 | 12.68 | 37.7 | 761 | 30 | 75 | 13 | 12 | 72.9 | 2.75 | — | E85 | 9.77 | 29.2 | 780 | 85 | 57 | 13 | 30 | 71.5 | 2.71 | — | Ethanol | 9.01 | 26.9 | 785 | 100 | 52 | 13 | 35 | 71.0 | 2.69 | 850 |
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aHeat content of stoichiometric mixture.
bLatent heat of vaporization.
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