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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
SMALL ENGINE-GENERATOR SET OPERATING ON DUAL-FUEL MODE WITH ETHANOL – CASTOR OIL BLENDS
Submission Author:
Carlos Roberto Altafini , RS
Co-Authors:
Carlos Roberto Altafini, Carlos Alberto Costa, Giovani Dambros Telli, Josimar Souza Rosa
Presenter: Carlos Roberto Altafini
doi://10.26678/ABCM.ENCIT2020.CIT20-0041
Abstract
The operation of a small engine-generator set in mono-fuel mode (diesel oil - DO), and in dual-fuel mode using hydrous ethanol (HET) and castor oil (OM) blends was analyzed. Efficiency, power, specific fuel consumption and gaseous emissions were assessed in a single cylinder diesel cycle engine. The percentages in volume of the HET-OM samples were: 75% - 25%, 70% - 30%, 60% - 40%, and 50% - 50%. The exhaust gas temperature decreased with the mixtures. Carbon monoxide emission decreased 57%, carbon dioxide decreased 9.8%, and nitrogen oxides reduced 19%. It was also observed that the percentage of opacity tends to decrease close to zero with addition of ethanol. Hydrocarbon emissions increased with rising of the OM concentration and the same for the specific fuel consumptions, which was 25.4% higher than diesel oil. The best efficiency was achieved with blend HET75-OM25, being 9% higher compared to diesel oil operation. Power on diesel oil operation showed a better result keeping stable, with the increase of the compression ratio and the delay of the start of injection. In general, the results confirmed that the performance is comparable to that of diesel oils, indicating that renewable fuels appear as an alternative for the reduction of the environmental impacts and the reduction of fossil fuels consumption.
Keywords
Internal combustion engine, ethanol, Castor oil, dual fuel operation
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