Kajian Efek Medan Elektromagnet terhadap Karakteristik Semburan Bahan Bakar Solar, Biodiesel dan Campuran Keduanya

Tatun Hayatun Nufus, Wawan Hermawan, Radite Praeko Agus Setiawan, Armansyah Halomoan Tambunan

Abstract


Abstract
Research on optimization of diesel engine fuel have been conducted, among other, by utilizing the electromagnetic field. To prove that by using the electromagnetic field of the combustion process to be optimal among them is to analyze the character of atomization. The purpose of this research was to analyze
the effect of fuel magnetization on the fuel spray pattern. Experiments were conducted using several fuel including diesel fuel, mixtures of diesel fuel and biodiesel of 10%, 40%, 70%, and biodiesel. Before the spraying test, the fuel was exposed to strong electromagnetic field with variation of wound coil 5000-9000 winding (876-1300 Gauss) for 5 minutes. The spraying test used an injector tester at a pressure of 14.7 Mpa. The spray was observed using a high-speed camera. It was appeared that the larger magnetic field applied to the fuel caused the viscosity to fall in the range of 5-15%, increasing the angle of the sprays or widespread area of the bursts in the range of 3.5-12%, and the particle size of the bursts becomes smaller by 0.2916-0.975 nm. This information is considered to be useful for further research in order to resolutely clarify the phenomenon of efficient combustion process of fuel after exposure to magnetic field.


Abstrak
Berbagai penelitian tentang pengoptimalisasian bahan bakar motor diesel telah banyak dilakukan, salah satunya dengan memanfaatkan medan elektromagnet. Untuk membuktikan bahwa dengan menggunakan medan elektromagnet proses pembakaran menjadi optimal diantaranya adalah dengan menganalisis karakter semburan bahan bakar. Tujuan penelitian ini adalah menganalisis efek magnetisasi bahan bakar terhadap pola semburan bahan bakar. Bahan bakar yang digunakan adalah solar, B10, B40, B70, dan biodiesel. Bahan bakar yang dicoba diberi paparan kuat medan elektromagnet dengan variasi jumlah lilitan kawat 5000-9000 lilitan 836.45 - 1353 Gauss selama 5 menit (300 detik) dan dilanjutkan
dengan proses penyemprotan melalui alat injector tester pada tekanan 14.7 Mpa. Hasilnya diamati dengan kamera kecepatan tinggi. Tampak bahwa makin besar medan magnet yang diberikan pada bahan bakar
menyebabkan viskositas turun pada kisaran 5-15%, meningkatkan sudut semburan atau luas daerah semburan menjadi lebih besar berkisar 3.5-12%, dan ukuran partikel semburan menjadi lebih kecil sebesar
0.2916-0.975 nm. Informasi ini berguna untuk penelitian lebih lanjut agar secara jelas dapat mengklarifikasi fenomena magnetisasi bahan bakar terhadap proses pembakaran yang efisien.


Keywords


biodiesel, combustion, electromagnet, fuel, spray

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