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A. Grummy Wailanduw
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grummywailanduw@unesa.ac.id
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+6285730235172
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jurnalotopro@unesa.ac.id
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Jurusan Teknik Mesin Fakultas Teknik Universitas Negeri Surabaya Gedung A6 Kampus UNESA Ketintang Surabaya 60231 Telp. (031) 8299487, Fax. (031) 8292957
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Otopro
Published by Universitas Negeri Surabaya
ISSN : 1858411X     EISSN : 26857863     DOI : http://dx.doi.org/1026740/otopro
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Otopro diterbitkan 2 (dua) kali setahun yaitu bulan Mei dan November oleh Jurusan Teknik Mesin, FT-UNESA, sebagai media informasi dan forum kajian masalah ilmu Teknik Mesin. Berisi tentang tulisan ilmiah, ringkasan hasil penelitian, pembahasan kepustakaan dan gagasan kritis yang orisinil. Redaksi mengundang para ahli, praktisi, dan siapa saja yang berminat untuk menyumbangkan tulisan yang belum pernah diterbitkan dalam media cetak lain, tema tulisan meliputi: Permesinan, Konversi Energi, Material dan Metalurgi, Manufaktur, Rancang Bangun Mesin
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 6 Documents
 1 
Search results for , issue "Vol 20 No 1 Nov 2024" : 6 Documents clear
THE EFFECT OF TEMPERATURE ON Na, K, AND Ca EMISSION DURING COMBUSTION OF PINEWOOD SAWDUST Legonda, Isack
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p13-16

Abstract

Quantification of Na, K, and Ca emissions from the combustion of pinewood sawdust has been conducted. The concentration of these metals in both sawdust and ashes was determined using inductive coupled plasma spectrometry. Ash samples were collected at 550 oC and 900 oC to simulate the actual operating conditions for thermal conversion processes which are mainly pyrolysis, gasification, and combustion. Also, tar samples were collected from the pyrolysis process conducted at 500 oC to assess the concentration of selected metals. The analysis results showed that emissions of Na, K, and Ca were found to range from 19-39 ppm, 340-400 ppm, and 500-550 ppm for temperatures between 550 oC and 900 oC respectively. The presence of metal content in tar supports that the emission mechanism can be through adhesion during the volatilization of heavy hydrocarbons from biomass combustion. Thus, the study findings suggest that treatment of metal emissions from the open fire such as that of firewood cookstoves is highly recommended.
ANALISA GETARAN POROS POMPA SENTRIFUGAL PADA SISTEM PENYAMBUNGAN KOPLING SABUK DENGAN VARIASI DIMENSI UKURAN TEBAL DAN LEBAR SABUK Can, Aldo; Isranuri, Ikhwansyah
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p24-30

Abstract

Pump machines at the Regional Drinking Water Company can pump and deliver drinking water to homes for the community's needs. But in reality, pumping machines are not always 100% able to convert electrical energy into motion energy. The remnants of wasted energy are Vibration. Vibration can damage the engine components connecting to the pump, namely bearings, shafts and flanges. Another cause is misalignment in the flange connection of the motor and pump. The solution is to connect the two flanges with a flexible and elastic material, namely 4 belts. For this reason, this analysis uses the Spring Mass Model with a Multiple Degrees of Freedom System, which is 3 DOF. The thickness variations of the belt used are 4.5 mm, 6 mm and 7.5 mm and the width is 98 mm, 120 mm, and 145 mm. The results of the analysis of the belt with dimensions of 145 mm wide and 7.5 mm thick have the smallest acceleration, velocity, deviation values, namely 8.53 m⁄s2 , 0.42 m/s, 0.24 m, have mass, stiffness and the largest attenuation, which is 1.52 kg, 133 N/m, and 937.76 N⁄(m⁄s) and at Natural Frequency which is 7.5 mm thick, it means the best and most resistant among all variations of the thickness and width of the belt tested. and recommended to the Regional Water Company.  
PENGARUH DIAMETER MAIN JET TERHADAP KINERJA MESIN PENGGERAK KAPAL NELAYAN SKALA KECIL Nugroho, Agung; Arifin, Syamsul; Wahid, Muhammad Abdul
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p7-12

Abstract

Environmental pollution caused by exhaust gases from two-stroke outboard engines, known for their high fuel consumption, is a significant issue for small-scale fishermen. This study aims to optimize fuel consumption and engine performance by examining the effect of main jet diameter on a 40 Hp two-stroke outboard engine. The experimental method was employed with three main treatments: main jet #150, #145, and #135. Testing was conducted by measuring fuel consumption at various engine speeds (rpm) – maximum, medium, and minimum – as well as the resulting boat speed. The results showed that using a larger main jet (#150) produced lower rpm and boat speed but higher fuel consumption. Conversely, the main jet #135 yielded higher rpm and boat speed with more efficient fuel consumption. However, potential long-term engine damage was indicated with the use of main jet #135. In conclusion, the main jet #145 is  considered optimal for normal operating conditions, offering a balance between engine performance and fuel efficiency.
PENGARUH TEMPERATUR PEMANASAN DAN MEDIA PENDINGINAN PADA PROSES FLAME HARDENING TERHADAP NILAI KEKERASAN PADA BAJA S45C Machfuroh, Talifatim; Lostari, Aini; Ulum, Miftahul; Pramartaningthyas, Ellys Kumala
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p1-6

Abstract

Sprocket is one of the main components in two-wheeled vehicles that transfer the rotary force from the engine to the rear wheels of the motorcycle. Because of this main function, the sprocket wears out faster due to friction between the chain and the sprocket. Therefore, a heat treatment process is needed to improve the mechanical properties of steel to make it more resistant to friction. Based on this background, this research focuses on the effect of temperature and cooling media on the hardness level of the material that receiving heat treatment in the form of flame hardening. The material used is S45C steel. The heat treatment process is carried out on steel with heating temperatures of 750º C and 850º C. After being heated, the steel will be quenched quickly with cooling media in the form of fresh water and turalic oil 48 ISO VG 46. Next, the hardness analysis process is carried out on the test object. From the results of the hardness test, it was found that the highest average hardness value was produced by the test object which underwent a flame hardening process at a temperature of 850 oC with fresh water cooling medium, which was 335.333 HB. Fresh water cooling media tends to produce higher hardness values ​​than turalic oil. This is because the cooling rate of fresh water is faster than oil.
THE EFFECT OF SHIELDING GAS ON SURFACE DEFECTS AND MECHANICAL PROPERTIES OF MATERIALS AFTER THE GMAW WELDING Catrawedarma, IGNB; Rosi, Azriel Alfito Dela; Wahid, M. Abdul; Pamuji, Dian Ridlo; Sari, Eli Novita; Fiveriati, Anggra
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p17-23

Abstract

This research aims to analyze the strength and results of welded joints by testing non-destructive and destructive tests using CO2 and argon shielding gases. The type of welding used was gas metal arc welding with SS400 steel material. After welding, the material was tested using liquid penetrant, porosity, tensile, and bending tests. The results were that CO2 shielding gas tended to have a convex and wide shape, while the welding results from argon gas tended to have a small and flat shape. In both shielding gases, there were defects in undercuts, lack of fusion, and spatter after the liquid penetrant test. The porosity test results have circular spots and irregular lines with holes. The average tensile strength value obtained from argon shielding gas was 255.761 MPa, and CO2 shielding gas produced an average value of 219.671 MPa. The bending strength of the material with argon shielding gas obtained an average value of 729.00 MPa and CO2 gas shielding an average value of 611.99 MPa.
RANCANG BANGUN RANGKA PEMBANGKIT LISTRIK PORTABLE DENGAN MENGGUNAKAN PEMBANGKIT LISTRIK TENAGA BAYU DAN PEMBANGKIT LISTRIK TENAGA SURYA Siswanto, Yudi; Amiruddin, Amiruddin; Nurjannah, Ika; Khair, Miftahul
Otopro Vol 20 No 1 Nov 2024
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/otopro.v20n1.p31-37

Abstract

Electrical energy sources have developed rapidly today in order to minimize the use of fuel oil which is currently decreasing in number and the distribution of electricity from PLN to the community which is not evenly distributed. The use of renewable and environmentally friendly energy will provide a solution when compared to the use fuels fossil  such as coal which will soon run out, it is also known that Indonesia is a coastal country with abundant wind speed and sunlight potential. Therefore, this study aims to create a power generator by utilizing the potential of solar power plant (PLTS) and wind power plant (PLTB) energy sources by adding a portable system is designed using solidworks. In the process of making this tool, planning is carried out to make a design, design determines the tools and materials used, the work process, cutting hollow iron according to the specified size, welding, and installation of windmills. The size of this power plant is 1330mm long, 600mm wide and 700mm high. The results of the portable power plant test using a 15W capacity lamp obtained the highest results at 11.05VDC PLTS and the highest voltage at 2.45VDC PLTB. In addition, this study also carried out a safety factor simulation on the power plant frame from the simulation results obtained as follows in part one stress value (vonmises) 9.873e-08N/m2, displacement 3.930e-04 mm, strain 4.637e+04 N/m2, and safety factor 1.741, In the frame section two stress (vonmises) 5.554e-04N/m2, displacement 3.098e-00mm, strain 9.488e-08N/m2, and safety factor 3.6.

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