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The role of magnetic field orientation on the flame characteristics of Calophyllum Inophyllum droplets wigo ardi winarko; Nasrul Ilminnafik; Muh Nurkoyim Kustanto; Dony Perdana
Jurnal Keteknikan Pertanian Vol. 10 No. 3 (2022): Desember 2022
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.010.3.215-225

Tujuan dari penelitian secara eksperimental ini untuk mengetahui pengaruh bagaimana calopyllum inophilum oil dan variasi medan magnet mempengaruhi stabilitas nyala, waktu tunda penyalaan, suhu, dan tinggi selama pembakaran tetesan. Saat ini, Indonesia masih mengembangkan biodiesel minyak sawit sebagai sumber bahan bakar terbarukan untuk menggantikan solar. Persoalannya, minyak sawit dijadikan sebagai sumber pangan sehingga akan berdampak pada kelangkaan pangan. Bahan bakar yang digunakan dalam penelitian ini adalah crude calopyllum inophillum oil yang ditambah dengan variasi orientasi medan magnet Selatan - Utara, Utara - Selatan, Selatan - Selatan, Utara - Utara dan tanpa magnet. Volume droplet yang diuji 1,25-1,31 ml ditempatkan pada thermocouple type K 0,1 mm yang terletak di antara 2 magnet, dengan intensitas medan magnet 1.1 Tesla (11000 Gauss). Hasil penelitian menunjukkan bahwa medan magnet berperan meningkatkan kualitas pembakaran melalui perannya meningkatkan tumbukan antar molekul menjadi lebih kuat karena spin elektron yang dipercepat oleh medan magnet. Pengaruh tersebut dapat dilihat pada arah medan magnet Utara - Selatan yang menghasilkan temperatur paling tinggi dan waktu tunda nyala api yang paling pendek. Ini karena arah kutub magnet berperan sebagai transport O2 dan H2O melintasi droplet sehingga reaksi yang dihasilkan mampu meningkatkan kualitas pembakaran.

Effect of layer height, infill geometry, nozzle temperature, and fan speed on tensile strength of 3D printing PETG specimens Mahatma Junjung Mardlotila; Muhammad Trifiananto; Dedi Dwilaksana; Hari Arbiantara Basuki; Muh Nurkoyim Kustanto; Intan Hardiatama
invotek Vol 22 No 3 (2022): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v22i3.1045

This research is aimed to provide insight on the dependency of tensile strength on process parameters of the Fused Deposition Modeling (FDM). FDM is one of the most popular 3D printing manufacturing techniques. In the present study, a tensile test was performed to measure the tensile strength of PETG (Polyethylene terephthalate glycol) specimen with the combination of different layer height, infill geometry, nozzle temperature, and fan speed whereas other parameters are kept at a constant level. This study uses the ISO 527 1BA standard. Taguchi L16 (44) with 4 levels for each factor was used to determine the effect of each parameter. Each experiment repeated 3 times to minimize the occurrence of errors. layer height, infill geometry, nozzle temperature, and fan speed respectively effect of 13.4%, 63.6%, 19.0%, and 2.7%. Fan speed is considered a parameter that has no impact on tensile strength. The layer height and nozzle temperature parameter shows that the higher the value, the tensile strength of specimens tend to increase. Furthermore, infill geometry from the one with the highest to the lowest tensile strength value is gyroid, zig-zag, grid, and triangles. The combination of layer height of 0.24 mm, infill geometry gyroid, and nozzle temperature of 250 ˚C is the optimum combination of parameters which has the highest tensile strength of 34.76 N/mm2.

A study on Flame Characteristics Premixed Burning by Giving Magnetic Field Induction Deny tomy andrianto; Muh. Nurkoyim Kustanto; Yuni Hermawan; Nasrul Ilminnafik; Salahuddin Junus
Jurnal POLIMESIN Vol 21, No 2 (2023): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v21i2.3497

This study aims to compare the effect of magnetic field induction on the characteristics of the fire resulting from the combustion of premixed biodiesel calophyllum inophyllum . Further research on premixed combustion flames due to magnetic field induction. As time goes by, petroleum is currently running low, therefore alternative biofuels are needed. One type of non-food vegetable oil is Jatropha and calophyllum inophyllum oil, besides not being consumed, it can be processed into biodiesel as fuel. To get a more effective and efficient flame, you can apply a magnetic field effect to the fire, especially in terms of the burning rate of the fire. The experimental research method is to heat calophyllum inophyllum biodiesel until it is in the form of steam, then flow it to the burner which will then be given air which is controlled by the flow mass. Then the fire is ignited and the mass of the air flow is increased until the fire is lifted until it is extinguished. Two magnets are placed between the burners by varying the direction of the magnetic field N-S, N-N and the results of this study are the shape of the flame. The resulting fire is more transparent, clearer and more visible. The direction of the N-S magnetic field causes the temperature to be higher than the direction of the N-N magnetic field. The high and low of the flame is affected by the direction of the magnetic field, the stronger the N-S magnetic field. The magnetic field can affect the burning speed of the biodiesel flame. In a poor mixture (ϕ 1) in the presence of magnetic influence, the rate of fire is lower without the influence of a magnetic field, but in a rich mixture (ϕ 1) in the presence of a magnetic influence, the rate of fire is higher than without the influence of a magnetic field. This is due to the magnetic influence that induces oxygen. Oxygen is paramagnetic, so it can be attracted by magnetic fields.

Studi Kecepatan Pembakaran Laminar dan Tinggi Api Premix Avgas 100 LL dengan Variasi Ekuivalen Rasio Nasrullah, Muhammad Nur Cahyo Hidayat; Kustanto, Muh Nurkoyim; Darsin, Mahros; Ilminnafik, Nasrul; Syuhri, Skriptyan Noor Hidayatullah
TURBO [Tulisan Riset Berbasis Online] Vol 12, No 2 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i2.2952

Aviation gasoline atau yang umum disebut dengan avgas merupakan bahan bakar bagi pesawat dengan mesin piston. Pesawat tipe ini pada umumnya banyak digunakan untuk pelatihan terbang hingga untuk penyemprotan tanaman. Banyak peneliti yang telah membahas mengenai bahan bakar ini. Namun, masih belum ditemukan mengenai pengujian kecepatan pembakaran (SL) dan tinggi api laminar premix menggunakan metode bunsen burner. Oleh karena itu penelitian ini membahas mengenai studi kecepatan pembakaran laminar dan tinggi api premix avgas 100 LL dengan memvariasikan ekuivalen rasio dari 0,8; 1,0 dan 1,2. Pada penelitian ini ditemukan bahwa kecepatan pembakaran tertinggi didapatkan pada ekuivalen rasio 1,0 yakni 49,31 cm/detik. Namun pada pengujian tinggi api, ekuivalen rasio 1,0 menghasilkan nilai tingi api terendah yakni 6,303 mm. Hal ini disebabkan karena nilai maksimum kecepatan pembakaran umumnya tercapai pada rasio stoikiometrik, yang menandakan saat bahan bakar dan udara dicampur dalam proporsi yang tepat untuk pembakaran sempurna. Dengan pembakaran campuran bahan bakar-udara yang mendekati stokiometri ini maka menyebabkan nilai tinggi api semakin rendah. Fenomena ini terjadi karena tinggi api terkait erat dengan konsumsi penuh uap bahan bakar, Sehingga, tinggi api mencapai titik akhir ketika semua bahan bakar yang menguap telah terbakar habis.

Characteristic Analysis of Horizontal Axis Wind Turbine Using Airfoil NACA 4712 Susilo, Bili Darnanto; Jatisukamto, Gaguk; Kustanto, Muh Nurkoyim
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 3, No 2 (2019)
Publisher : Universitas Negeri Malang

Wind energy has been developed and used as a source of electrical energy by converting wind energy into electrical energy using a generator. There are some wind turbine parameters that important for wind turbines design and model, includes the size of the rotor radius, airfoil selection, chord length, and pitch angle. The study aims to characterize the performance of a horizontal axis wind turbine using computational methods. The methods used a design and simulation of NACA 4412 and NACA 4712 airfoil using QBlade software using wind conditions in the region of Pancer, Jember. Results show that the maximum Cl value of NACA 4712 is higher than in NACA 4412. NACA 4712 has a maximum Cl value = 1.696 at α = 14o while NACA 4412 airfoil has a maximum value of Cl = 1.628 at α = 15o. NACA 4712 has the maximum value of Cl/Cd = 153 at α = 2o , while the NACA 4412 has a maximum value of Cl/Cd = 133.5 at α = 5.5o. The maximum value of Cl/Cd 4712 is higher than the NACA 4412. At 7.66 m/s of wind speed with 10% turbulence conditions, wind turbines with NACA 4712 airfoil have Cp turbine performance parameters of 0.49929 and obtain a power of 1.15 kW, while wind turbines with NACA 4412 have Cp turbine performance parameters of 0.395365 and obtained power of 0.889 kW at the same wind speed.

The Combustion Characteristics of Calophyllum inophyllum Fuel in the Presence of Magnetic Field Sugara, Imam Rudi; Ilminnafik, Nasrul; Junus, Salahuddin; Kustanto, Muh Nurkoyim; Hermawan, Yuni
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 7, No 1 (2023)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v7i12023p028

The study objective is to investigate the combustion characteristics of Callophyllum inophyllum fuel in presence of a magnetic fields. To conduct the experiment, a bunsen burner was utilized, with fuel and air being dispensed via a syringe pump and compressor, both regulated by a flowmeter. The fuel and air pipes were heated to 532.15 (K) to facilitate fuel evaporation. The equivalent ratio of 0.5, 1, and 1.5 was adjusted to control air discharge and fuel. An 11,000 gausses artificial magnet was used, with N-S, N-S, N-N, and S-S being the various magnetic pole configurations. The study found that the magnetic field can enhance combustion quality by affecting the molecules involved in the combustion process. The magnetic field's force also intensifies the movement of O2, making it more energetic. As O2 travels from the North Pole to the South Pole through the combustion reaction zone, it quickens the oxidation-reduction process and curtails diffusion combustion. The red color's intensity diminishes with the magnetic field's effect, indicating this phenomenon. When a magnetic field is applied, the polarity of C.inophyllum biodiesel fuel becomes highly favorable. The triglyceride carbon chain bonds become unstable, and the van der Walls dispersion forces are weakened, which facilitates easier O2 binding to the fuel, resulting in more efficient combustion. An increase in the laminar burning velocity value can be noticed when exposed to a magnetic field.

Effect of Biodiesel B100 and Ethanol Blends on the Performance of Small Diesel Engine Firdiansyah, Alfian; Ilminnafik, Nasrul; Triono, Agus; Kustanto, Muh Nurkoyim
International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2021.002.02.3

A small diesel engine is a machine that has high efficiency but causes a high level of pollution. The most widely used fuel so far is fossil energy which is unrenewable energy. The fruit of the Calophyllum inophyllum plant has great potential to be developed as alternative energy for small diesel engines. In this study, the test fuel used was D100, B100, E5, E10, and E15. The small engine diesel used TG-R180 Diesel with a compression ratio of 20:1 at engine turns 1500, 1800, 2100, and 2400 rpm, and the braking load at a constant prony disc brake is 1,5 kg/cm2. The result of the study using E10 fuel can improve engine performance and can reduce the opacity of the exhaust gas. The highest power in the D100 fuel at 2100 rpm is 8,06 PS. The highest thermal efficiency of E10 fuel is 50,29%. The use of Calophyllum inophyllum biodiesel (B100) can reduce exhaust gas opacity in small diesel engines when compared to the use of D100. E10 fuel has the lowest exhaust gas opacity rate of 4,1%.

Effect of Biodiesel B100 and Ethanol Blends on the Performance of Small Diesel Engine Firdiansyah, Alfian; Ilminnafik, Nasrul; Triono, Agus; Kustanto, Muh Nurkoyim
International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2021.002.02.3

A small diesel engine is a machine that has high efficiency but causes a high level of pollution. The most widely used fuel so far is fossil energy which is unrenewable energy. The fruit of the Calophyllum inophyllum plant has great potential to be developed as alternative energy for small diesel engines. In this study, the test fuel used was D100, B100, E5, E10, and E15. The small engine diesel used TG-R180 Diesel with a compression ratio of 20:1 at engine turns 1500, 1800, 2100, and 2400 rpm, and the braking load at a constant prony disc brake is 1,5 kg/cm2. The result of the study using E10 fuel can improve engine performance and can reduce the opacity of the exhaust gas. The highest power in the D100 fuel at 2100 rpm is 8,06 PS. The highest thermal efficiency of E10 fuel is 50,29%. The use of Calophyllum inophyllum biodiesel (B100) can reduce exhaust gas opacity in small diesel engines when compared to the use of D100. E10 fuel has the lowest exhaust gas opacity rate of 4,1%.

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