Ikhsanudin, Zaky (2025) Analisis Pengaruh Variasi Putaran Mesin Terhadap Performa dan Emisi Mesin Bensin Menggunakan Campuran Minyak Serai Wangi. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The increasing use of fossil fuels poses serious problems, not only in terms of depleting non-renewable resources, but also in terms of the negative impact on the environment through exhaust emissions. Bioethanol and lemongrass oil have the potential to be used as fuel substitutes. However, the use of bioethanol and lemongrass oil as fuel blends has rarely been studied, so further research is needed to determine their effect on performance and exhaust emissions. This study aims to analyze the effect of varying mixtures of lemongrass oil bioadditives in bioethanol and pertalite on performance and exhaust emissions. The method used in this study is experimental testing on a Honda GX200 gasoline engine. Various fuel composition variations, such as PBA1, PBA2, PBA3, PBA4, PB1, B1, and G1, and engine speed variations of 2000, 2200, 2400, 2600, and 2800 rpm were applied at a constant load of 450 watts. The measured output parameters included power, torque, specific fuel consumption, efficiency, and exhaust gas emissions such as CO, CO2, O2, and HC. The results of the study show that the addition of lemongrass oil bioadditives to bioethanol and pertalite has a significant impact. The PBA3 fuel blend shows a 15% increase in power, 16% increase in torque, and the highest thermal efficiency of 64% compared to pure pertalite. In addition, the PBA3 fuel blend tends to reduce the specific fuel consumption value by 27%. In terms of temperature, all PBA2 and PBA4 fuel blends were proven to significantly reduce the operating temperature of engine components compared to pure pertalite, due to the high latent heat of vaporization of bioethanol and lemongrass oil. In terms of emissions, the PBA3 fuel blend showed a 61% and 82% reduction in hydrocarbon and carbon monoxide emissions, respectively, indicating more complete combustion thanks to the addition of oxygenate compounds. Keywords: Petrol Engine, Exhaust Emissions, Bioethanol, Performance.
| Item Type: | Thesis (Undergraduate) | ||||||||
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| Subjects: | T Technology > TJ Mechanical engineering and machinery | ||||||||
| Divisions: | Faculty of Engineering > Departement of Mechanical Engineering | ||||||||
| Depositing User: | Zaky Ikhsanudin | ||||||||
| Date Deposited: | 22 Dec 2025 04:09 | ||||||||
| Last Modified: | 22 Dec 2025 04:41 | ||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/48149 |
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