EFEK VARIASI CAMPURAN BAHAN BAKAR DIESEL, METANOL KADAR RENDAH DAN JATROPHA TERHADAP EQUIVALENCE RATIO PADA MESIN DIESEL DENGAN HOT EGR

Authors

  • Yafid Effendi

DOI:

https://doi.org/10.31000/mbjtm.v2i1.1275

Abstract

Salah satu jenis mesin kendaraan bermotor yang sangat sesuai untuk
transportasi dan kendaraan alat berat adalah mesin diesel, karena efisiensi
pembakaran yang tinggi, kehandalan, fleksibilitas bahan bakar, dan rendahnya
konsumsi bahan bakar membuat diesel banyak digunakan di beberapa Negara.
Campuran metanol kadar rendah dan jatropha digunakan sebagai bahan bakar
alternatif. Pengujian ini dilakukan dengan menggunakan variasi prosentase
beban, yaitu pada beban 25%, 50%, 75%, dan 100% dengan variasi bahan bakar
diesel murni (D100) dan campuran bahan bakar biosolar, metanol kadar rendah
dan jatropha (D85LPM5J10, D80LPM10J10, D75LPM15J10, D75LPM5J20,
D70LPM10J20, D65LPM15J20, D65LPM5J30, D60LPM10J30 dan
D55LPM15J30) pada 2000 rpm. Hal ini bertujuan untuk mengetahui seberapa
besar equivalence ratio yang dihasilkan ketika tanpa katub (OEV) dibandingkan
dengan ketika katub (OEV) dan ketika menggunakan bahan bakar diesel murni
dibandingkan dengan ketika menggunakan campuran bahan bakar biosolar,
metanol kadar rendah dan jatropha pada mesin diesel Isuzu 4JB1 injeksi
langsung dengan sistem Hot EGR (Exhaust Gas Recirculation). Metanol kadar
rendah yang digunakan mempunyai kadar air 24,88% berbasis volume.
Penelitian ini dilakukan eksperimen dilaboratorium thermofluid UNDIP. Hasil
penelitian ini, dengan meningkatkan nilai equivalence ratio diikuti peningkatan
EGR. Nilai equivalence ratio cenderung menurun ketika menggunakan
campuran bahan bakar dibandingkan D100. Ada beberapa campuran bahan
bakar terjadi peningkatan nilai equivalence ratio dibandingkan D100 untuk
D65LPM15J20 dan D80LPM10J10 pada beban rendah (25%) sebesar 4.52%
dan 11.4%.

 

Kata Kunci: Rasio Ekuivalen, EGR, Biosolar, Metanol, Jatropha

Motor Bakar : Jurnal Teknik Mesin Vol. 2 No. 1 Mei 2018

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Published

2018-05-30

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Vol. 2 No. 1 (2018): Motor Bakar : Jurnal Teknik Mesin

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