Hirowati, Rozy Aini (2019) Pengaruh Penambahan Mass Flow Rate Udara Menggunakan Electric Supercharger terhadap Karakteristik Pembakaran pada Mesin Diesel Dual Fuel CNG-Biodiesel. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Diesel Dual Fuel (DDF) merupakan mesin diesel yang dikembangkan dengan pemakaian dua bahan bakar, yaitu bahan bakar diesel sebagai pilot fuel dan bahan bakar CNG sebagai main fuel. Dalam pemakaian pilot fuel diinjeksikan melalui injector didalam ruang bakar, sedangkan main fuel diinjeksikan pada intake manifold. Pengembangan DDF umumnya mengalami permasalahan pada berkurangnya rasio udara pembakaran dan bahan bakar. Jumlah udara pembakaran menjadi lebih sedikit karena adanya pemasukan CNG. Hal tersebut menyebabkan AFR menjadi lebih rendah. Penambahan mass flow rate udara merupakan salah satu cara untuk mengatasi penurunan AFR. Penelitian ini bertujuan untuk mengoptimalkan penambahan mass flow rate udara pembakaran menggunakan electric supercharger terhadap karakteristik pembakaran pada mesin DDF CNG-Biodiesel CPO (B100). Karakteristik pembakaran yang dimaksud adalah proses pembakaran, unjuk kerja serta emisi mesin. 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 mass flow rate udara ke dalam intake manifold sebesar 0.007074 kg/s, 0.007237 kg/s, 0.007401 kg/s, 0.007618 kg/s, dan 0.007836 kg/s dengan mengatur voltage 8V, 9V, 10V, 11V, dan 12V pada electric supercharger. Penambahan mass flow rate udara yang masuk dapat meningkatkan performa mesin diesel dual fuel diantaranya parameter thelmal efficiency, dan AFR masing-masing sebesar 3.60% dan 19.62%, serta penurunan specific fuel consumption sebesar 3.68%. Meningkatkan proses pembakaran, yaitu tekanan silinder dan HRR masing-masing sebesar 18.22% dan 11.04%, serta dapat menurunkan emisi gas buang CO dan HC masing-masing sebesar 34.53% dan 22.71%. Namun jika dibandingkan dengan single fuel, nilai thermal efficiency lebih rendah sebesar 17.60%, nilai specific fuel consumption lebih tinggi 14.23%, dan AFR rata-rata naik sebesar 0.67%. Serta emisi CO dan HC lebih tinggi sebesar 71.36% dan 250.52% atau 2.5 kali.
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Diesel Dual Fuel (DDF) is a standard diesel engine that has developed with two kinds of fuel, gasses fuel as the main fuel and oil fuel as the pilot fuel. In the use of combustion chamber, pilot fuel injected through injector, while the main fuel is injected into the intake manifold. Generally, development of DDF has problems in reducing the ratio of combustion between air and fuel. The amount of air combustion becomes less because of CNG injected. This causes AFR to be lower. Addition of air mass flow rate is one of the ways to overcome the decrease in AFR. This study aims to optimize the combustion of air mass rates using CNG-Biodiesel CPO DDF machines (B100). The combustion characteristics are the combustion process, performance and engine emissions. The research was carried out experimentally using a diesel engine DI 800 single fuel which has been modified to be dual fuel. The fuel used is crude palm oil biodiesel (B100) and Compressed Natural Gas (CNG) which is injected indirectly (indirect injection). The method used is the addition of air mass flow rate into the intake manifold of 0.007074 kg / s, 0.007237 kg / s, 0.007401 kg / s, 0.007618 kg / s, and 0.007836 kg / s by adjusting the voltage 8V, 9V, 10V, 11V, and 12V on the electric supercharger. The addition of air intake mass flow rate can improve the performance of dual fuel diesel engines including parameters thelmal efficiency, and AFR respectively by 3.60% and 19.62%, as well as a decrease in specific fuel consumption of 3.68%. Improve the combustion process, which is cylinder pressure and HRR of 18.22% and 11.04% respectively, and can reduce exhaust emissions of CO and HC by 34.53% and 22.71% respectively. But when compared to single fuel, the thermal efficiency value is lower by 17.60%, the specific fuel consumption value is 14.23% higher, and AFR increases by 0.67%. And CO and HC emissions are higher at 71.36% and 250.52% or 2.5 times.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Diesel Dual Fuel, Biodiesel, CNG, mass flow rate, 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: | Rozy Aini Hirowati |
| Date Deposited: | 22 Jul 2026 00:56 |
| Last Modified: | 22 Jul 2026 00:56 |
| URI: | http://repository.its.ac.id/id/eprint/67088 |
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