Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
EMISSIONS IN TWO-STROKE ENGINE OPERATING WITH NON- COMMERCIAL FUEL BLENDS (GASOLINE/ETHANOL)
Submission Author:
Robson Leal da Silva , MS , Brazil
Co-Authors:
Jean Paulo Carneiro Junior, Marcelo Mendes Vieira
Presenter: Robson Leal da Silva
doi://10.26678/ABCM.ENCIT2016.CIT2016-0704
Abstract
The analysis of combustion products is important in the study of internal combustion engines, especially in assessing the efficiency of the combustion process and the determination of compliance with emission laws in force. Otto-cycle engines, as in the case of air blower and other two-stroke engines, emissions of CO, NOx and aldehydes are the of mainly interest. This paper presents results of experimental tests in a small air blower, two-stroke internal combustion engine, operating on non-commercial fuel for different proportions in gasoline and ethanol blends (A10 up to A30). Appropriate instrumentation was used to carry out the measurement of the main parameters. For this work was used the portable flue gas analyzers GreenLine 8000 and the methodology was based on regulations from ABNT – Brazilian Society for Standard Normatives (testing of internal combustion engines and ethanol determination in fuel blends). The parameters obtained are angular velocity (rpm) and exhaust gas emissions for O2 (%), CO2 (%), CO (ppm), NOx(ppm) and the UHC (ppm), besides, these parameters are correlated to specific fuel mass consumption (g.W/min). The results obtained are analyzed and discussed when varying angular velocity (~3000-7000 rpm), for each combination fuel blend (A10, A20 and A30), versus exhaust gas emissions O2, CO, UHC, NOx and CO2. Main findings are: a) Increases in angular velocity implies in higher quantities of UHC; b) A30 and A20 present, respectivelly, the higher and lowest UHC emission levels among all fuel samples.
Keywords
Combustion, Biofuels (ethanol), Energy conversion efficiency, Thermal Machinery
