Pengaruh Methanol Kadar Tinggi Terhadap Performa dan Penurunan Emisi Gas Buang Mesin Bensin dengan Sistem Hot EGR

Ahmad Syarifuddin

Ahmad Syarifuddin Jurusan Teknik Mesin, SMKN 1 Ampelgading Pemalang

Abstrak

Abstrak

Peningkatan jumlah kendaraan bermotor di Indonesia menyebabkanÂ meningkatnya konsumsi bahan bakar minyak, sehingga mengakibatkan semakin menipisnya ketersediaan bahan bakar minyak (fosil). Maka dibutuhkan penelitian yang intensif untuk mencari bahan bakar alternatif yang dapat diperbaharui dan ramah lingkungan sebagai pengganti bahanÂ bakar fosil. Methanol merupakan salah satu bahan bakar yang memenuhi kriteria tersebut di atas karena memiliki sifat-sifat fisika dan kimia yang baik. Eksperimen ini bertujuan untuk mengetahui pengaruh penggunaan bahan bakar campuran premium dan methanol kadar tinggi dengan sistem exhaust gas recirculation (EGR) panas terhadap performa dan emisi gas buang pada mesin bensin Toyota Yaris Seri 1SZFE, 4 silinder 16 katup, sistem electronic fuel injection (EFI). Sebuah dynamometer merek DYNO-mite Land&Sea untuk mengukur daya mesin dan sebuah gas analyser untuk mengukur emisi gas buang. Pada saat pengambilan data menggunakan rasio campuran bahan bakar premium dan methanol yaitu M0%, M5%, M10% dan M15%. Eksperimen dilakukan pada variasi putaran mesin 2500 rpm, 3000Â rpm, 3500 rpm dan 4000 rpm, beban ditetapkan 25% dan Opening of EGR Valve (OEV) 0% dan 7%. Hasil penelitian menunjukkan bahwa pemakaian bahan bakar campuran premium-methanol mengakibatkan kenaikan brake power.Sedangkan brake specific fuel consumption (BSFC) menurun pada 2500 rpm, untuk M15% tanpa EGR yaitu 14,11% dan pada M15% dengan EGR sebesar 12,50%. Penurunan emisi gas buang terjadi pada CO dan HC.Â

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Kata kunci : EGR, emisi, HPM

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Jurusan Teknik Mesin, SMKN 1 Ampelgading Pemalang

Referensi

Amr Ibrahim, S. Bari. (2010). An experimental investigation on the use of EGR in a supercharged natural gas SI engin. Fuel 89, pp. 1721-1730.

Chijen Yang, Jackson R.B., Nicholas. (2012) Communication: Chinaâ€™s growing methanol economy and it simplications for energy and the environment. Energy Policy, 41, pp. 878â€“884.

D. Agarwal, S.K. Singh, A.K. Agarwal. (2011) Effect of Exhaust Gas Recirculation (EGR) on performance, emissions, deposits and durability of constant speed compression ignition engine. Applied Energy 88, pp. 2900-2907.

E. Galloni, G. Fontana, R. Palmaccio. (2013). Effects of exhaust gas recycle in a downsized gasoline engine. Apllied energy, 105, pp. 99â€“107.

Haiqiao Wei, T. Zhu, G. Shu, L. Tan, Y. Wang. (2012) Gasoline engine exhaust gas recirculation - a review. Applied energy, 99, pp. 534â€“544.

Hao Chen, Yanga L., Zhanga P., Li J., Geng L., Ma Z. (2014). Formaldehyde Emissions of Gasoline Mixed with Alcohol Fuels and Influence Factors. JJMIE, China, Volume 8 Number 2, pp. 76 â€“ 80.

Hong Zhao, Ge Y., Tan J., Yin H., Guo J., Zhao W., Dai P. (2011). Effects of different mixing ratios on emissions from passenger cars fueled with methanol/gasoline blends. Journal of Environmental Sciences, ScienceDirect, 23(11) pp. 1831â€“1838.

Jing GONG, ZHANG Y, TANG C, HUANG Z. (2014) Emission Characteristics of Iso-Propanol/Gasoline Blends in A Spark-Ignition Engine Combined With Exhaust Gas Re-Circulation. China, Thermal science, Vol. 18, No. 1, pp. 269-277

Jinyoung Cha ., Kwon J, Cho Y, Park S. (2001.) The Effect of Exhaust Gas Recirculation (EGR) on Combustion Stability, Engine Performance and Exhaust, Emissions in a Gasoline Engine. KSME International Journal, Korea, VoL 15 No. 10, pp. 1442 -1450.

J. B. Heywood. (1988). Internal combustion engine fundamental. By Mc. Graw-Hill.

L. Sileghem, A. Coppens, B.Casier, J. Vancoillie, S. Verhelst. (2014). Performance and emissions of iso-stoichiometric ternary GEM blends on a production SI engine. Fuel, 117, pp. 286â€“293.

M.B. Chelik, B. Ozdalyan, F. Alkan. (2011). The use of pure methanol as fuel at high compression ratio in a single cylinder gasoline engine. Fuel, 90, pp. 1591-1598.

M. Canacki, A.N. Ozsezen, E. Alptekin, M. Eyidogan. (2013). Impact of alcohol-gasoline fuel blends on the exhaust emission of an SI engine. Renewable Energy 52, pp. 111-117.

M. Eyidogan, A. N. Ozsezen, M. Canakci, A. Turkcan. (2010). Impact of alcohol-gasoline fuel blends on the performance and combustion characteristics of an SI engine. Fuel, volume 89, pp. 2713-2720.

M.K Balki, C. Sayin, M. Canakci. (2014). The effect of different alcohol fuels on the performance, emission and combustion characteristics of a gasoline engine. Fuel, 115, pp. 901â€“906.

Pepei Dai, Y. Ge, Y. Lin, S. Su, B. Liang. (2013). Investigation on characteristics of exhaust and evaporative emissions from passenger cars fueled with gasoline/methanol blends. Fuel, 113, pp. 10â€“16.

Pulkrabek, Willard W. (2010). Engineering Fundamentals of the Internal Combustion Engine. New Jersey : Prentice Hall.

Simeon Iliev. (2015). A comparison of Ethanol and Methanol Blending with Gasoline Using a 1-D Engine Model. Procedia Engineering, volume 100, pp. 1013-1022.

Simeon Penchev Iliev, Kiril Iliev Hadjiev. (2014) Theoretical Study of Engine Performance Working on Methanol-Gasoline Blends. IAENG London, U.K. Vol II.

Zijin Zhang, H. Zhang, T. Wang, M. Jia. (2014) Effect of tumble combined with EGR (exhaust gas recirculation) on the combustion and emissions in a spark ignition engine at part loads. Energy, volume 65, pp. 18-24.