Pengaruh Penggunaan BBM B35 Dan B40 Terhadap Tekanan Pembakaran, Emisi, Spesific Fuel Consumption (SFC) Dan Ignition Delay Pada Diesel Engine

Pertiwanda, Suluh (2025) Pengaruh Penggunaan BBM B35 Dan B40 Terhadap Tekanan Pembakaran, Emisi, Spesific Fuel Consumption (SFC) Dan Ignition Delay Pada Diesel Engine. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Biodiesel menawarkan potensi dalam mengurangi emisi dan meningkatkan efisiensi pembakaran. Studi ini bertujuan untuk mengevaluasi karakteristik kinerja pembakaran dan emisi gas buang dari biodiesel B35 dan B40 pada pembangkit listrik tenaga diesel berdaya 3 MW dengan variasi beban 50%, 75%, dan 100%. Hasil pengujian menunjukkan bahwa pada B40 terjadi peningkatan daya sebesar 3.06% dan BMEP sebesar 2.29%. Terjadi juga peningkatan efisiensi termal sebesar 0.78% namun disertai kenaikan SFC 0.60%, hal ini menunjukkan bahwa efek peningkatan kandungan oksigen lebih dominan dibanding penurunan heating value. Viskositas pada B40 yang lebih besar menyebabkan Ignition Delay (ID) menjadi lebih panjang sebesar 0.92o CA, tekanan silinder naik sebesar 2.29% dan Peak Pressure bergeser sebesar 0.73o menjauhi TMA. Selain itu, penggunaan B40 mengurangi emisi Particulate Matter sebesar 18.68% dan CO sebesar 2.91% namun diikuti dengan peningkatan emisi NOx sebesar 4.28% dibanding B35. Secara keseluruhan, B40 menunjukkan potensi yang menjanjikan untuk mesin diesel dalam meningkatkan efisiensi dan mengurangi emisi karbon. Namun, tantangan terkait peningkatan NOx dan peningkatan SFC perlu diatasi melalui optimalisasi lebih lanjut. ==================================================================================================================================
Biodiesel holds significant potential for reducing emissions and enhancing combustion efficiency. This study evaluates the combustion performance characteristics and exhaust gas emissions of B35 and B40 biodiesel blends in a 3 MW diesel power plant at varying loads of 50%, 75%, and 100%. The test results indicate that using B40 led to a 3.06% increase in power and a 2.29% increase in Brake Mean Effective Pressure (BMEP). Thermal efficien-cy also saw a 0.78% improvement, though accompanied by a 0.60% rise in Specific Fuel Consumption (SFC). This suggests that the positive effect of increased oxygen content outweighed the reduction in heating value. The higher viscosity of B40 resulted in a 0.92° crank angle (CA) longer Ignition Delay (ID). Cylinder pressure increased by 2.29%, and the peak pressure shifted 0.73° CA away from Top Dead Center (TDC). Furthermore, B40 re-duced Particulate Matter (PM) emissions by 18.68% and Carbon Monoxide (CO) by 2.91% compared to B35. However, it also led to a 4.28% increase in Nitrogen Oxides (NOx) emissions. Overall, B40 shows promising potential for diesel engines in terms of improving efficiency and reducing carbon emissions. Nevertheless, challenges related to increased NOx and SFC neces-sitate further optimization.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Biodiesel, B35, B40, Efisiensi, SFC, Keterlambatan Pembakaran, Emisi Gas Buang, Variasi Beban, Biodiesel, B35, B40, Efficiency, SFC, Combustion Delay, Exhaust Gas Emissions, Load Variation
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Suluh Pertiwanda
Date Deposited:	31 Jul 2025 04:32
Last Modified:	31 Jul 2025 04:32
URI:	http://repository.its.ac.id/id/eprint/124882

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