Studi Eksperimen Variasi Tekanan Injektor Dengan Bahan Bakar Etanol Terhadap Unjuk Kerja, Konsumsi Bahan Bakar Spesifik, Dan Emisi Gas Buang Pada Engine Empat Langkah 124.7 Cc

Subiakto, Diego Surya Dewangga (2021) Studi Eksperimen Variasi Tekanan Injektor Dengan Bahan Bakar Etanol Terhadap Unjuk Kerja, Konsumsi Bahan Bakar Spesifik, Dan Emisi Gas Buang Pada Engine Empat Langkah 124.7 Cc. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Etanol adalah bahan bakar yang dapat diperbarui, dengan nilai oktan = >120 dengan nilai kalornya 26950 kJ/kg yang lebih rendah dari bensin dengan nilai oktan = 91 dan nilai kalor = 44791 kJ/kg, sehingga jika digunakan sebagai bahan bakar pada mesin SIE harus ada penyesuaian. Untuk itu dilakukan penelitian agar dapat mengetahui pengaruh variasi tekanan injeksi bahan bakar terhadap kinerja mesin 1 silinder 4 langkah. Variasi tekanan yang diteliti adalah 2.5 bar, 3 bar, 3.5 bar, 4 bar, 4.5 bar, 5 bar, tanpa merubah durasi injeksi. Pengujian yang dilakukan meliputi uji kinerja putaran variabel menggunakan dynojet dan uji gas buang dilakukan pada putaran idle menggunakan gas analizer. Pada pengujian yang telah dilakukan mendapatkan efisiensi terbaik pada tekanan injeksi bahan bakar 2.5 bar, yaitu menghasilkan BTE = 31.65 %, Daya = 9.15 hp, Torsi = 10.05, dan BMEP = 1012.87 kPa, Demikian juga emisi gas buang terbaik dihasilkan pada tekanan injeksi 2.5 bar yaitu dengan nilai CO = 2.91 %, CO2 8.8 %, dan HC= 1131 ppm. Berdasarkan emisi gas buang yang dihasilkan di tiap variasi tekanan injeksi masih berada dibawah amabang batas Peraturan Pemerintah LH No. 05 Th. 2006, semakin tinggi tekanan injeksi bahan bakar, nilai emisi yang dihasilkan juga semakin tinggi, hal ini diakibatkan oleh bahan bakar yang tidak seluruhnya terbakar dengan baik. ================================================================================================ Ethanol is a renewable fuel, with an octane rating = >120 with a calorific value of 26950 kJ/kg which is lower than gasoline with an octane rating of = 91 and a calorific value = 44791 kJ/kg, so if it is used as fuel in an SIE engine it must be there is an adjustment. For this reason, research was conducted in order to determine the effect of variations in fuel injection pressure on the performance of a 1 cylinder 4 stroke engine. The pressure variations studied were 2.5 bar, 3 bar, 3.5 bar, 4 bar, 4.5 bar, 5 bar, without changing the injection duration. The tests carried out include a variable rotation performance test using a dynojet and an exhaust gas test carried out at idle speed using a gas analyzer. In the tests that have been carried out, the best efficiency at fuel injection pressure of 2.5 bar, which produces BTE = 31.65%, Power = 9.15 hp, Torque = 10.05, and BMEP = 1012.87 kPa, Likewise, the best exhaust gas emissions are produced at injection pressure of 2.5 bar namely with the value of CO = 2.91%, CO2 8.8%, and HC = 1131 ppm. Based on the exhaust gas emissions produced in each variation of the injection pressure, it is still below the threshold of Government Regulation No. LH. 05 Th. 2006, the higher the fuel injection pressure, the higher the emission value, this is caused by the fuel not burning properly.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Etanol, Variabel Speed Test, Kinerja, Emisi gas buang, Ethanol, Research Variation, Performance, Emissions
Subjects: Q Science
Q Science > Q Science (General) > Q180.55.M38 Mathematical models
Q Science > Q Science (General) > Q325.5 Machine learning.
T Technology > TP Chemical technology > TP339 Ethanol as fuel. Biomass energy.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: DIEGO SURYA DEWANGGA
Date Deposited: 14 Aug 2021 14:37
Last Modified: 14 Aug 2021 14:37
URI: https://repository.its.ac.id/id/eprint/86772

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