Farnanta Putra, Alfian Octaviano (2026) Studi Eksperimen Pengaruh Penggunaan Bahan Bakar Campuran Dexlite Dan Minyak Pirolisis Plastik Terhadap Kinerja Dan Emisi Gas Buang Pada Mesin Diesel 4 Langkah 4 Silinder 4JA1-L. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan energi nasional yang meningkat, emisi dari kendaraan bermotor, dan penumpukan limbah plastik menjadi masalah besar di Indonesia. Mengubah limbah plastik menjadi minyak pirolisis plastik (PO) adalah solusi yang sangat menjanjikan, meskipun dalam penerapannya masih terhambat oleh keterbatasan dari karakteristik fluida tersebut. Oleh karena itu, penelitian ini dilakukan untuk mengetahui pengaruh campuran bahan bakar Dexlite dan PO terhadap kinerja mesin serta gas buang mesin diesel 4 langkah 4 silinder model 4JA1-L (2500 cc) yang dilengkapi turbocharger. Pengujian peforma mesin dilakukan dengan menggunakan chassis dynamometer dengan metode variable speed test, sedangkan pengujian emisi dilakukan dengan alat opacity smoke meter. Variasi bahan bakar mencakup Dexlite murni serta campuran PO dengan kadar 10% (DPO10), 20% (DPO20), dan 30% (DPO30) berdasarkan fraksi volume. Hasil pengujian menunjukkan bahwa penambahan fraksi PO dalam campuran menghasilkan penurunan densitas dan viskositas kinematik namun menaikkan angka setana hingga 52,2 pada DPO30. Pada putaran 2400 RPM, variasi DPO30 menghasilkan torsi (156,59 Nm), daya (39,32 kW), dan BMEP tertinggi dengan kenaikan sekitar 0,23% dibandingkan dengan Dexlite murni. Sebaliknya, di putaran mesin yang sama, Dexlite menghasilkan nilai Brake Specific Fuel Consumption (BSFC) dan efisiensi termal (BTE) di angka 35,02%, menjadi yang tertinggi dibanding penggunaan campuran bahan bakar lainnya. Dari segi lingkungan, peningkatan kadar PO menyebabkan peningkatan opasitas asap hingga mencapai nilai tertinggi sebesar 37,3% pada DPO30. Meskipun demikian, semua variasi campuran tersebut masih berada jauh di bawah batas emisi yang diizinkan pemerintah (65% HSU), sehingga masih bisa dianggap aman bagi lingkungan.
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The increasing national energy demand, emissions from motor vehicles, and the accumulation of plastic waste are major problems in Indonesia. Converting plastic waste into plastic pyrolysis oil (PO) is a very promising solution, although its application is still hampered by the limitations of the fluid characteristics. Therefore, this study was conducted to determine the effect of a mixture of Dexlite and PO fuel on engine performance and exhaust gas of a 4-stroke, 4-cylinder diesel engine model 4JA1-L (2500 cc) equipped with a turbocharger. Engine performance testing was carried out using a chassis dynamometer with a variable speed test method, while emission testing was carried out using an opacity smoke meter. Fuel variations included pure Dexlite and PO mixtures with levels of 10% (DPO10), 20% (DPO20), and 30% (DPO30) based on volume fraction. Test results showed that adding more PO percentage to the mix lowers density and kinematic viscosity but increases the cetane number up to 52.2 for DPO30. At 2400 RPM, the DPO30 variation produces torque (156.59 Nm), power (39.32 kW), and the highest BMEP, with an increase of about 0.23% compared to pure Dexlite. On the same engine cycle, Dexlite produces a Brake Specific Fuel Consumption (BSFC) and thermal efficiency (BTE) of 35.02%, which is the highest compared to other fuel mixtures. In terms of the environment, an increase in PO levels leads to higher smoke opacity, reaching its highest value of 37.3% at DPO30. Even so, all those mixed variations are still well below the government's allowed emission limit (65% HSU), so they can still be considered safe for the environment.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Minyak Pirolisis Plastik, Dexlite, Mesin Diesel, Fisikokimia, Unjuk Kerja, Opasitas, Plastic Pyrolysis Oil, Dexlite, Diesel Engine, Physicochemistry, Performance, Opacity |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ797 Diesel motor--Fuel systems--Testing. T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting. |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Alfian Octaviano Farnanta Putra |
| Date Deposited: | 30 Jul 2026 07:14 |
| Last Modified: | 30 Jul 2026 07:14 |
| URI: | http://repository.its.ac.id/id/eprint/139842 |
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