Comparison Emission and Fuel Consumption of Engine of 6000 Watts Electric Generator Fuelled with Biogas and Gasoline
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Abstract
The electric generator with a capacity 6000 watts was prepared in this research to be able to be fuelled with flexible fuel. The engine in this generator was 4 strokes engine, single cylinder of 4 stroke spark ignition engine with cylinder volume of 420 cc that can be operated fully with biogas and if biogas is not available, the engine can also be run by using gasoline with an easy switch mechanism. The method developed in this research was different from the idea of dual-fuel which was the fuel was mixed. Two types of Biogas are prepared in this research, type 1 biogas was purified from H2S and H2O, and type 2 of biogas was purified from CO2, H2S, and H2O. The gasoline type that was used in this work was the pertalite with a research octane number (RON) was 90. The engine was run with no load (idle position) and with a load 250 watts and the effect on emission and fuel consumption were recorded and analyzed. The result indicates that the average fuel consumption of using biogas type 1 is about 44.24 L/Minute in idle position and increases to become 45.35 L/minute with load 250 watts. For biogas type 2 the fuel consumption is found about lower, that is 43.76 L/Minute in idling position and increase to reach 45.04 L/minute for with load 250 watts.It is noted here that by using gasoline the fuel consumption is 0,023 L/ Minutes in idle position and a little bit increase to become 0.024 L/minute for 250-watt load. The CO emission is found at 3.91 % vol. for gasoline engine in idle position and reduce a little bit to become 3.5 % vol. with load 250 watts. The emission is found excellent if biogas is used as a fuel comparing gasoline. For biogas type 1, the CO emission is found 0.06 % vol. in idle position and just a bit increase to become 0.07 % vol. if loaded at 250 watts. The best performance is found for biogas type 2 that the CO emission is found 0.04% vol. and still in this value at loading 250 watts.
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