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

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

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Abstract

Pengembangan energi baru terbarukan (EBT) dibutuhkan sebagai solusi alternatif terhadap ketergantungan yang tinggi pada bahan bakar fosil. Salah satunya yaitu biodiesel. Biodiesel memiliki beberapa kelemahan seperti nilai kalor rendah dan viskositas tinggi. Untuk mengatasi kelemahan tersebut, pemanfaatan hidrogen dalam mesin diesel dengan sistem dual fuel menjadi pilihan yang menjanjikan, mengingat karakteristik hidrogen yang memiliki nilai kalor tinggi dan emisi yang lebih bersih. Namun, permasalahannya adalah penambahan hidrogen menyebabkan berkurangnya pasokan udara pembakaran sehingga menyebabkan kekurangan oksigen selama pembakaran yang dapat menurunkan performa. Penambahan supercharger ditujukan untuk menambah pasokan udara yang diharapkan menjadi solusi untuk mengatasi masalah tersebut. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan hidrogen terhadap performa dan emisi mesin diesel dual fuel berbahan bakar biodiesel dan hidrogen dengan penambahan supercharger. Penelitian ini dilakukan dengan metode eksperimen pada mesin diesel dual fuel berbahan bakar biodiesel B-100 dan hidrogen dengan konsentrasi hidrogen direntang 2,5 – 10 lpm dan penggunaan supercharger untuk meningkatkan suplai udara ke ruang bakar. Hasil penelitian menunjukkan bahwa penambahan hidrogen menyebabkan penurunan daya keluaran (brake power) akibat respon governor yang mengurangi suplai biodiesel secara signifikan untuk menjaga putaran tetap konstan pada 1500 rpm. Penurunan suplai biodiesel tersebut lebih signifikan besar dibanding penambahan hidrogen sehingga total daya input menurun dan berdampak pada performa mesin. Sebaliknya, penggunaan supercharger terbukti meningkatkan brake power di semua mode operasi. Tambahan pasokan udara dari supercharger memperbaiki rasio udara-bahan bakar (AFR), menghasilkan pembakaran yang lebih optimal, efisiensi termal yang lebih tinggi, dan konsumsi bahan bakar yang lebih efisien. Penambahan hidrogen juga menyebabkan peningkatan nilai AFR, menciptakan campuran yang lebih miskin. Dalam aspek emisi, penambahan hidrogen efektif menurunkan emisi karbon monoksida (CO), karbon dioksida (CO₂), dan hidrokarbon (HC), seiring berkurangnya input karbon dari biodiesel. Namun, emisi nitrogen monoksida (NO) meningkat akibat kenaikan temperatur pembakaran. Penambahan supercharger semakin menurunkan emisi CO dan HC, namun meningkatkan emisi CO₂ dan NO akibat pembakaran yang lebih sempurna dan temperatur ruang bakar yang lebih tinggi.
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The development of new renewable energy is needed as an alternative solution to the high dependence on fossil fuels. One of them is biodiesel. Biodiesel has several disadvantages such as low calorific value and high viscosity. To overcome these weaknesses, the utilization of hydrogen in diesel engines with dual fuel systems is a promising option, given the characteristics of hydrogen which has a high heating value and cleaner emissions. However, the problem is that the addition of hydrogen causes a reduction in the combustion air supply, leading to a lack of oxygen during combustion which can reduce performance. The addition of a supercharger to increase the air supply is expected to be a solution to the problem. This study aims to analyze the effect of hydrogen addition on the performance and emissions of a dual fuel diesel engine fueled by biodiesel and hydrogen with the addition of a supercharger. This research was conducted by experimental method on a dual fuel diesel engine fueled by B-100 biodiesel and hydrogen with hydrogen concentration in the range of 2.5 - 10 lpm and the use of a supercharger to increase the air supply to the combustion chamber. The results showed that the addition of hydrogen caused a decrease in brake power due to the governor response which significantly reduced the biodiesel supply to keep the rotation constant at 1500 rpm. The reduction in biodiesel supply was more significant than the addition of hydrogen, resulting in a decrease in total input power and impacting engine performance. In contrast, the use of a supercharger was shown to increase brake power in all operating modes. The additional air supply from the supercharger improved the air-fuel ratio (AFR), resulting in more optimized combustion, higher thermal efficiency, and more efficient fuel consumption. The addition of hydrogen also leads to an increase in the AFR value, creating a poorer mixture. In terms of emissions, hydrogen addition effectively reduced carbon monoxide (CO), carbon dioxide (CO₂), and hydrocarbon (HC) emissions, as the carbon input from biodiesel was reduced. However, nitrogen monoxide (NO) emissions increased due to the increase in combustion temperature. The addition of a supercharger further reduced CO and HC emissions, but increased CO₂ and NO emissions due to more complete combustion and higher combustion chamber temperatures.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Biodiesel, Hidrogen, Mesin Diesel Dual Fuel, Supercharger, Biodiesel, Diesel Dual Fuel Engine, Hydrogen, Supercharger
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. T Technology > TJ Mechanical engineering and machinery > TJ799 Diesel motor--Electronic control.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Architecture > 23201-(S1) Undergraduate Thesis
Depositing User:	Tengku Muhammad Rafly Asmadi
Date Deposited:	04 Aug 2025 06:09
Last Modified:	04 Aug 2025 06:09
URI:	http://repository.its.ac.id/id/eprint/126013

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