Studi Eksperimen Pengaruh Penambahan Hidrogen Dengan Biodiesel B-100 Terhadap Performa Dan Emisi Mesin Diesel Dual Fuel Dengan Penambahan Supercharger Dan Egr

Sihaloho, Hilarius (2025) Studi Eksperimen Pengaruh Penambahan Hidrogen Dengan Biodiesel B-100 Terhadap Performa Dan Emisi Mesin Diesel Dual Fuel Dengan Penambahan Supercharger Dan Egr. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Ketergantungan dunia terhadap bahan bakar fosil masih tinggi, menyebabkan konsumsi minyak bumi meningkat dan memperparah masalah lingkungan, seperti pemanasan global akibat meningkatnya emisi karbon. Sebagai solusi alternatif, penggunaan biodiesel sebagai pengganti diesel fosil mulai diterapkan, terbukti mampu mengurangi emisi karbon monoksida (CO) dan hidrokarbon (HC). Namun, biodiesel masih memiliki kelemahan, seperti peningkatan emisi nitrogen oksida (NOx) serta penurunan performa mesin. Untuk mengatasi kelemahan tersebut, pemanfaatan hidrogen dalam sistem dual fuel (biodiesel-hidrogen) menjadi perhatian. Hidrogen yang memiliki kecepatan pembakaran tinggi dan nilai energi yang tinggi mampu meningkatkan performa mesin dan efisiensi termal. Namun demikian, penggunaan hidrogen juga meningkatkan emisi NOx akibat tingginya suhu pembakaran. Teknologi Exhaust Gas Recirculation (EGR) diperkenalkan untuk menekan peningkatan emisi NOx tersebut dengan cara menurunkan suhu pembakaran melalui pencampuran ulang gas buang ke udara masuk. Namun, penggunaan EGR justru mengurangi performa karena mengurangi rasio udara yang masuk ke ruang pembakaran, sehingga dibutuhkan supercharger untuk menjawab masalah tersebut. Penelitian ini bertujuan untuk mengetahui pengaruh variasi rasio massa hidrogen terhadap performa dan emisi mesin diesel dual fuel berbahan bakar biodiesel B100 Crude Palm Oil (CPO) dan hidrogen dengan tambahan supercharger serta EGR. Percobaan dilakukan dengan putaran mesin konstan 1500 rpm, variasi beban 1000 hingga 5000 watt, laju aliran hidrogen 5 lpm, dan bukaan EGR 0-20% Hasil penelitian menunjukkan bahwa penambahan hidrogen (mode Dual Fuel) mampu meningkatkan efisiensi termal (BTE), namun menurunkan Brake Power dibandingkan mode Single Fuel. Peningkatan EGR secara konsisten menurunkan Brake Power pada kedua mode bahan bakar. Pada sisi emisi, penambahan EGR terbukti sangat efektif menurunkan emisi Nitrogen Oksida (NOx) di semua kondisi. Pengaruh EGR terhadap emisi Karbon Monoksida (CO) dan Hidrokarbon (HC) menunjukkan hasil yang berlawanan: EGR menaikkan emisi CO dan HC pada mode Single Fuel, namun justru menurunkannya pada mode Dual Fuel, yang menandakan adanya interaksi sinergis antara hidrogen dan EGR.
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The world's dependence on fossil fuels remains high, leading to increased petroleum consumption and exacerbating environmental problems, such as global warming due to rising carbon emissions. As an alternative solution, the use of biodiesel as a substitute for fossil diesel has been implemented, proving its ability to reduce carbon monoxide (CO) and hydrocarbon (HC) emissions. However, biodiesel still has drawbacks, such as an increase in nitrogen oxide (NOx) emissions and a decrease in engine performance. To overcome these weaknesses, the utilization of hydrogen in a dual-fuel system (biodiesel-hydrogen) has garnered attention. Hydrogen, with its high flame speed and high energy value, can improve engine performance and thermal efficiency. Nevertheless, the use of hydrogen also increases NOx emissions due to high combustion temperatures. Exhaust Gas Recirculation (EGR) technology was introduced to suppress this increase in NOx by lowering the combustion temperature through the recirculation of exhaust gas into the intake air. However, the use of EGR reduces performance by decreasing the air ratio in the combustion chamber, thus requiring a supercharger to address this issue. This research aims to investigate the effect of varying hydrogen mass ratios on the performance and emissions of a dual-fuel diesel engine fueled with B100 Crude Palm Oil (CPO) biodiesel and hydrogen, with the addition of a supercharger and EGR. The experiment was conducted at a constant engine speed of 1500 rpm, with load variations from 1000 to 5000 watts, and hydrogen flow rates of 5 lpm, and EGR 0-20%. The results indicate that the addition of hydrogen (Dual Fuel mode) increased the Brake Thermal Efficiency (BTE) but decreased the Brake Power compared to the Single Fuel mode. Increasing the EGR rate consistently decreased the Brake Power in both fuel modes. On the emissions side, increasing EGR was proven to be highly effective in reducing Nitrogen Oxide (NOx) emissions under all conditions. The effect of EGR on Carbon Monoxide (CO) and Hydrocarbon (HC) emissions showed contrasting results, EGR increased CO and HC emissions in the Single Fuel mode but effectively decreased them in the Dual Fuel mode, indicating a synergistic interaction between hydrogen and EGR.

Item Type: Thesis (Other)
Uncontrolled Keywords: Mesin Diesel, Dual-Fuel, Hidrogen, Biodiesel B100, Supercharger, EGR, Performa Mesin, Emisi Gas Buang, Diesel Engine, Dual-Fuel, Hydrogen, B100 Biodiesel, Supercharger, EGR, Performance, Emissions.
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines. Spark ignition
T Technology > TJ Mechanical engineering and machinery > TJ797 Diesel motor--Fuel systems--Testing.
Divisions: Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Hilarius Martinus Valerian Sihaloho
Date Deposited: 04 Aug 2025 05:34
Last Modified: 04 Aug 2025 07:53
URI: http://repository.its.ac.id/id/eprint/126068

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