Hakim, Falih Akmal Rayhanurachman (2026) Studi Eksperimen Pengaruh Penggunaan Bahan Bakar Hasil Pirolisis Plastik Dibanding Bio Solar Dan Pertamina Dex Terhadap Performa Dan Emisi Gas Buang Mesin Diesel 4 Tak 4 Silinder 4JA1-L. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Peningkatan konsumsi bahan bakar fosil serta krisis penumpukan limbah plastik mendorong perlunya inovasi energi alternatif berupa minyak pirolisis plastik atau Waste Plastic Oil (WPO). Penelitian ini bertujuan menguji dan membandingkan performa serta emisi gas buang antara WPO dan bahan bakar diesel komersial pada kendaraan bermesin diesel konvensional. Pengambilan data dilakukan menggunakan alat chassis dynamometer pada rentang putaran 1600 hingga 4000 rpm. Hasil pengujian menunjukkan bahwa WPO mampu menghasilkan daya yang responsif dan efisien di putaran mesin 2000 rpm, terbukti dari nilai konsumsi bahan bakar (BSFC) WPO paling irit akibat pembakaran instan dari kalori plastik. Akan tetapi, pencapaian daya maksimal WPO berada di angka 44,11 kW pada 3200 rpm dan langsung anjlok di putaran atas, tertinggal dari Pertamina Dex yang mampu menghasilkan daya stabil hingga 48,68 kW. Penurunan daya WPO pada putaran tinggi ini dipicu oleh rendahnya titik nyala bahan bakar (42°C), yang menyebabkan ledakan terjadi terlalu dini di ruang bakar (Pre-Ignition) sehingga energi tersebut justru melawan pergerakan laju piston. Dari sisi lingkungan, asap gas buang WPO (39,3%) terbukti lebih bersih daripada Solar (42,5%) karena ketiadaan unsur belerang (sulfur) pada polimer plastik. Berdasarkan karakteristik daya tersebut, penggunaan WPO murni sangat direkomendasikan untuk mesin diesel stasioner yang beroperasi konstan di putaran rendah seperti genset listrik atau pompa air, namun perlu dicampur (blending) dengan aditif jika ingindiaplikasikan pada kendaraan berkecepatan tinggi.
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The increase in fossil fuel consumption and the crisis of plastic waste accumulation drive the need for alternative energy innovations in the form of plastic pyrolysis oil, or Waste Plastic Oil (WPO). This study aims to test and compare the performance and exhaust emissions between WPO and commercial diesel fuels in a conventional diesel engine vehicle. Data collection was conducted using a chassis dynamometer at an engine speed range of 1600 to 4000 rpm.
The test results showed that WPO was able to produce responsive and efficient power at an engine speed of 2000 rpm, evidenced by the lowest Brake Specific Fuel Consumption (BSFC) value due to the instantaneous combustion of the plastic's calorific content. However, the maximum power output of WPO peaked at 44.11 kW at 3200 rpm and immediately plummeted at higher engine speeds, falling behind Pertamina Dex, which was able to produce a stable power of up to 48.68 kW. This power drop at high engine speeds was triggered by the fuel's low flash point (42°C), which caused premature explosions in the combustion chamber (Pre-Ignition), resulting in expansion energy that opposed the upward movement of the piston. From an environmental perspective, the WPO exhaust smoke opacity (39.3%) proved to be cleaner than Solar B35 (42.5%) due to the absence of sulfur in the plastic polymers. Based on these power characteristics, the use of pure WPO is highly recommended for stationary diesel engines operating at constant low speeds, such as electrical generators or water pumps. However, it requires blending with additives if it is to be applied to high-speed vehicles.
| Item Type: | Thesis (Diploma) |
|---|---|
| Uncontrolled Keywords: | Mesin Diesel, Waste Plastic Oil, Performa Mesin, Opasitas Asap, Chassis Dynamometer. Chassis Dynamometer, Diesel Engine, Engine Performance, Smoke Opacity, Waste Plastic Oil. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ324.5 Fuel systems T Technology > TJ Mechanical engineering and machinery > TJ797 Diesel motor--Fuel systems--Testing. |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Falih Akmal Rayhanurachman Hakim |
| Date Deposited: | 24 Jul 2026 02:12 |
| Last Modified: | 24 Jul 2026 02:12 |
| URI: | http://repository.its.ac.id/id/eprint/136961 |
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