Pengaruh Penambahan Tekanan Injeksi Pilot Biodiesel Terhadap Performa Mesin, Proses Pembakaran dan Emisi pada Mesin CNG-Biodiesel CPO (B100) Dual Fuel

Darmawan, Agung Budi (2019) Pengaruh Penambahan Tekanan Injeksi Pilot Biodiesel Terhadap Performa Mesin, Proses Pembakaran dan Emisi pada Mesin CNG-Biodiesel CPO (B100) Dual Fuel. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Biodiesel sebagai bahan bakar alternatif dapat menggantikan bahan bakar yang berasal dari fosil yang semakin menipis karena sifatnya yang tidak dapat diperbaharui. Namun biodiesel memiliki nilai viskositas, densitas dan tegangan permukaannya yang lebih tinggi daripada bahan bakar fosil, maka pada pengoperasiannya membutuhkan perlakuan khusus agar proses atomisasi bahan bakar lebih baik. Peningkatan tekanan injeksi pada bahan bakar merupakan salah satu cara untuk meningkatkan kualitas atomisasi. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan tekanan injeksi bahan bakar terhadap proses pembakaran, performa mesin, dan pembentukan emisi pada mesin Diesel Dual Fuel. Penelitian dilakukan secara eksperimental dengan menggunakan mesin diesel DI 800 single fuel yang telah dimodifikasi menjadi dual fuel. Bahan bakar yang digunakan adalah crude palm oil biodiesel (B100) dan Compressed Natural Gas (CNG) yang diinjeksikan secara tidak langsung (indirect injection). Metode yang dilakukan adalah dengan penambahan tekanan injeksi pilot sebesar, 230 kg/cm2, 240 kg/cm2, 250 kg/cm2, dan 260 kg/ cm2. Dengan penambahan tekanan injeksi pilot biodiesel dapat meningkatkan performa diesel dual fuel. Didapatkan tekanan injeksi pilot optimal pada tekanan 260 kg/ cm2 dengan peningkatan dibandingkan dengan dual fuel standar sebesar 4.9%,4.6%,4,6%,11.5%, 6.5% untuk parameter, daya, torsi, brake mean effective pressure (BMEP), thermal efficiency, dan AFR. Serta penurunan specific fuel consumption sebesar 12,1%. Meningkatkan proses pembakaran, yaitu tekanan silinder dan HRR masing-masing sebesar 8.9% dan 17.2%, serta dapat menurunkan emisi gas buang CO dan HC masing-masing sebesar 18.64% dan 17,8%. Namun jika dibandingkan dengan single fuel, nilai thermal efficiency lebih rendah sebesar 7.50%,dan AFR rata-rata naik sebesar 11.3%. Serta emisi CO dan HC lebih tinggi sebesar 78.8% dan 318,7%.
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Biodiesel as an alternative fuel can replace the fossil fuels that are increasingly fewer due to their non-renewable energy. However, biodiesel have a higher viscosity value, density and surfaces tension than fossil fuel, so the operation requires a special treatment that the fuel atomization process is better . One of the ways to improve the quality of the fuel atomization is increasing the injection pressure. This research aims to determine the effect of adding pilot fuel injection pressure on the combustion process , engine performance, and the formation of emission on diesel dual fuel engines. The research was carried out experimentally using DI800 single fuel diesel engines which had been modified to be a dual fuel engine. The fuel are using a crude palm oil (B100) and Compressed Natural Gas (CNG) which is injected indirectly (indirect injection). The method carried out with the addition of a pilot injection pressure, 230 kg/cm2, 240 kg/cm2, 250 kg/cm2, and 260 kg/cm2. By adding of the biodiesel pilot injection pressure, can improve the diesel dual fuel engine performance. The optimal pilot injection pressure is obtained at 260 kg/ cm2 with an increase compared to the standard dual fuel 4,9%,4.6%,4,6%, 1,5%, 6,5% for parameters, power, torque, brake mean effective pressure (BMEP), thermal efficiency, and AFR. The specific fuel consumption is decreased by 12,1%. Improve the combustion process,wich is cylinder pressure and HRR of 8,9% and 17,2%, and can reduce exhaust emission of CO and HC by 18,64% and 17,8%. But when compared to single fuel diesel, the thermal efficiency value is lower by 7,50 %, and the average AFR increases by 11,3%. And also the CO and HC emissions were higher by 78,8% and 318,7%.

Item Type:	Thesis (Other)
Additional Information:	RSM 621.436 Dar p-1 2019
Uncontrolled Keywords:	Diesel Dual Fuel, Biodiesel, CNG, tekanan injeksi , performa mesin, proses pembakaran, emisi gas buang
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ254.7 Combustion chambers T Technology > TJ Mechanical engineering and machinery > TJ324.5 Fuel systems
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	darmawan agung budi
Date Deposited:	21 Jul 2026 03:03
Last Modified:	21 Jul 2026 03:03
URI:	http://repository.its.ac.id/id/eprint/67623

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