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Various studies of diesel fuel optimization have been done, one of them by using a permanent magnet on the fuel line, the lack of magnetic field intensity decreases along with time increasing by using an electromagnetic field. The purpose of this study is to analyse the biodiesel fuel characteristics due to exposure of electromagnetic fields in terms of the viscosity and vibration of these fuel molecules. Electromagnetic field is generated from wire coil of 5000-9000 on galvanum pipe with diameter of 1.5 cm and length of 10 cm and connected to 12 V batteries. Here, biodiesel fuel is inserted in a galvanum tube, magnetized for 1200 s, and tested its viscosity of the falling ball system by viscometer. Fuel functional groups as well as vibrations between fuel molecules are tested with FTIR. The results show that the magnetized fuel changes. The viscosity of fuels from 2933 to 2478 and an increasing in the absorption of fuel molecules ranges from 13-58%. Therefore, the increasing of vibrating fuel molecules decreases its molecular attraction tug. These indicate that the magnetized fuel molecule causes a changing in the fuel molecule, cluster becomes de-clustered. It is a potential method to clarify the phenomenon of fuel magnetization due to its efficient combustion process.

Jurnal Keteknikan Pertanian (JTEP) terakreditasi berdasarkan SK Dirjen Penguatan Riset dan Pengembangan Kementerian Ristek Dikti Nomor I/E/KPT/2015 tanggal 21 September 2015. Selain itu, JTEP juga telah terdaftar pada Crossref dan telah memiliki Digital Object Identifier (DOI) dan telah terindeks pada ISJD, IPI, Google Scholar dan DOAJ. JTEP terbit tiga kali setahun yaitu bulan April, Agustus dan Desember, dan mulai tahun ini berisi 15 naskah untuk setiap nomornya. Peningkatan jumlah naskah pada setiap nomornya ini dimaksudkan untuk mengurangi masa tunggu dengan tidak menurunkan kualitas naskah yang dipublikasikan. Jurnal berkala ilmiah ini berkiprah dalam pengembangan ilmu keteknikan untuk pertanian tropika dan lingkungan hayati. Jurnal ini diterbitkan dua kali setahun baik dalam edisi cetak maupun edisi online. Penulis makalah tidak dibatasi pada anggota PERTETA tetapi terbuka bagi masyarakat umum. Lingkup makalah, antara lain meliputi teknik sumberdaya lahan dan air, alat dan mesin budidaya pertanian, lingkungan dan bangunan pertanian, energi alternatif dan elektrifikasi, ergonomika dan elektronika pertanian, teknik pengolahan pangan dan hasil pertanian, manajemen dan sistem informasi pertanian. Makalah dikelompokkan dalam invited paper yang menyajikan isu aktual nasional dan internasional, review perkembangan penelitian, atau penerapan ilmu dan teknologi, technical paper hasil penelitian, penerapan, atau diseminasi, serta research methodology berkaitan pengembangan modul, metode, prosedur, program aplikasi, dan lain sebagainya. Penulisan naskah harus mengikuti panduan penulisan seperti tercantum pada website dan naskah dikirim secara elektronik (online submission) melalui

The price of oil fuel continues to rise, decreased supplies oil at the other side, those two factors motivate researchers to conduct research related to the efficient use of fuel. Have been made three types of fuel oil which the principle of an electromagnet used a filter, all three made of the coil with a convolution wire as many as 5000 a convolution and diameter of the nucleus of a coil 44.5 mm, 28.5 mm and 17.5 mm, a filter tested in a diesel engine. Testing done in the rpm the ignition is started 1100 until 1700 rpm, by opening throttle % to 60 % from 30%. Testing first one was done by making constant round of 1500 rpm and openings throttle vary from 30 % to 60%, next testing done with the variation of rpm start 1100 rpm until 1700 rpm by making constant valve as 40 % and of 60 % . The purpose of the variations to obtain optimum result against consumption of material fuel ( sfc ) the most little uses. Testing was done in a laboratory material. ABSTRAK Harga bahan bakar minyak terus naik, tetapi pasokan minyak berkurang. Kedua faktor tersebut yang mendorong peneliti untuk melakukan penelitian terkait efisiensi penggunaan bahan bakar. Telah dibuat tiga jenis bahan bakar minyak yang prinsipnya menggunakan filter electromagnet. Ketiganya terbuat dari koil dengan kawat konvolusi sebanyak 5.000, artinya, konvolusi dan diameter inti sebuah koil 44, mm, 28,5 mm dan 17,5 mm , filter diuji dalam mesin diesel. Pengujian dilakukan dalam putaran mesin mulai 1100 hingga 1700 rpm, dengan membuka throttle% hingga 60% dari 30%. Pengujian pertama dilakukan dengan membuat putaran konstan 1500 rpm dan bukaan throttle bervariasi dari 30% hingga 60%, pengujian selanjutnya dilakukan dengan variasi rpm mulai 1100 rpm hingga 1700 rpm dengan membuat valve konstan 40% dan 60%. Tujuan variasi untuk mendapatkan hasil optimal terhadap konsumsi bahan bakar material (sfc) paling sedikit menggunakan. Pengujian dilakukan dalam bahan laboratorium. Kata kunci: konsumsi bahan bakar spesifik, penganalisaan data, katup

Bioethanol is a renewable energy that can replace gasoline, which will run out in the future. This study investigates the influence of magnetization of bioethanol fuel on the fuel combustion temperature in the combustion chamber of a gasoline motor. The fuel used is bioethanol with a composition of E0 (pure gasoline), E10 (10 % bioethanol+90 % gasoline), E20 (20 % bioethanol+80 % gasoline), E30 (30 % bioethanol+70 % gasoline), E40 (40 % bioethanol+60 % gasoline). The fuel passed through the magnet with a magnetic variation of 647.15 Gauss, 847.25 Gauss, 1419.57 Gauss. The temperature sensor used is a K-type thermocouple. The temperature sensor was inserted in the combustion chamber to measure the combustion chamber temperature. The thermocouple data were recorded in Microsoft Excel on a computer using the LabVIEW program via NI-USB 9213 interface. The temperature data recorded is 400 data/second.  The results obtained without exposure to the magnetic field, the lowest peak temperature of 577.1998 °C at E40 and the highest peak temperature of 582.1786 °C at E0. The higher the bioethanol content, the lower the temperature of fuel combustion to the low bioethanol viscosity. The increasing magnetic field strength will increase the combustion temperature; hence the fuel burned quickly and the combustion process is more perfect. The result obtained with the magnetic field exposure, the lowest peak temperature of 577.8347 °C is at E40. The highest peak temperature of 587.36 °C is at E0. The use of a magnetic field in the bioethanol fuel mixture can increase the combustion temperature so that the fuel molecules move freely and the fuel is more easily mixed with oxygen. As more fuel is burned, the combustion of the fuel becomes complete

Research related to the magnetization of fossil fuels is currently believed to be able to improve the quality of combustion due to the cluster decluster effect on the fuel. Fossil fuels are finite and non-renewable. Meanwhile, non-fossil energy, especially bioethanol, despite having more environmentally friendly exhaust gas emissions and higher octane rating than gasoline, has a lower calorific value than gasoline. To overcome this deficiency, the fuel magnetization of a mixture of gasoline and bioethanol is carried out. The fuel is used in 4 stroke injection motorcycles. Furthermore, the performance of the 4-stroke injection motorcycle was observed. the fuel mixture without magnetization was used as a control variable. The intensity of the electromagnetic field used is less than 2,000 Gauss, this is different from previous analysts. As a result, the magnetized motorcycle experienced an increase in torque of 4.48 – 7.30%, power of 4 – 9.90%, and a decrease in SFC of 6 – 9.20%.

One of the efforts to determine the quality of combustion on the egine is the dielectric constant, therefore the purpose of this study is to make a device to test the fuel dielectric constants and observe the effect of the magnetic field strength on the fuel dielectric constant, the dielectric constant measurement is done by measuring the capacitance through a capacitor plate made of copper PCB and LCR measuring instrument. Initial testing uses air as the object at the same time for calibration. Furthermore, the object used is a mixture of biodiesel and diesel fuel. these data are compared between the biodiesel dielectric constant without the influence of magnetism and with biodiesel fuel which is influenced by magnetic fields. The measurement results show thatThe dielectric constant value of the frequency range 0 Hz to 550 Hz has fluctuations up and down so that the value is random. The frequency range of 600 Hz to 2000 Hz dielectric constant tends to decrease exponentially as frequency increases. The greater the magnetic field given to the biodiesel fuel, the smaller the dielectric constant value. this means that the moment of the dipole is more directed so that the combustion process can take place better.Key words : magnet field, biodiesel, dielectric constanta.ABSTRAKSalah satu upaya untuk mengetahui kualitas pembakaran pada engine yaitu konstanta dielektrik, oleh karena itu tujuan penelitian ini adalah membuat alat untuk menguji konstata dielektrik bahan bakar dan mengamati pengaruh kuat medan magnet terhadap konstanta dielektrik bahan bakar tersebut, pengukuran konstanta dielektrik dilakukan dengan cara mengukur kapasitansinya yaitu melalui plat kapasitor terbuat dari PCB tembaga dan alat ukur LCR. Pengujian awal menggunakan udara sebagai objeknya sekaligus untuk kalibrasi. Selanjutnya objek yang digunakan bahan bakar campuran biodiesel dan solar. Data-data ini dibandingkan antara konstanta dielektrik biodiesel tanpa pengaruh magnet dan dengan bahan bakar biodiesel yang dipengaruhi medan magnet. Hasil pengukuran menunjukkan bahwa nilai konstanta dielektrik rentang frekuensi 0 Hz sampai 550 Hz mengalami fluktuasi naik turun sehingga nilainya acak. Rentang frekuensi 600 Hz sampai 2000 Hz nilai konstanta dielektrik cenderung menurun secra eksponensial seiring dengan bertambahnya frekuensi.Semakin besar medan magnet yang diberikan pada bahan bakar biodiesel semakin kecil nilai konstanta dielektriknya.artinya momen dipolenya semakin terarah sehingga proses pembakaran dapat berlangsung lebih baik.Kata kunsi :medan magnet, biodiesel, konstanta dielektrik.

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