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All Journal Journal of Mechanical Engineering Science and Technology Civil and Environmental Science Journal (CIVENSE) Jurnal Elemen Scientific Journal of Mechanical Engineering Kinematika Buletin Profesi Insinyur JTAM ROTARY Logic : Jurnal Rancang Bangun Dan Teknologi Jurnal Inovasi Teknologi Manufaktur, Energi dan Otomotif
Isworo, Hajar
Politeknik Negeri Tanah Laut
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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KINERJA POMPA AIR TENAGA SURYA (PATS) DENGAN MENGGUNAKAN POMPA DC 12 VOLT 180 WATT Syaief, Adhiela Noer; Putra, Muhammad Rezky Fitri; Ivana, Reza Taufiqi; Artika, Kurnia Dwi; Isworo, Hajar
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.253

Abstract

The availability of solar energy has great potential for application in the agricultural sector. Electrical power from photovoltaic cells or solar panels mainly depends on sunlight at certain times. The use of this technology can be applied to pump drives in agricultural irrigation systems. In this research, we try to measure a certain time with the efficiency of components from using solar photovoltaic (SPV) with the water discharge produced by the pump on these components. From the experimental results, it was found that the best efficiency was at 14.00 WITA with an efficiency of 57% with the panel facing directly to the sun. From pump testing, it was found that the average water flow was 20.95 liters/minute. From these performance tests, Indonesia itself has sufficient levels of solar radiation to use solar panels as an alternative to sustainable resource.
UJI EKSPERIMENTAL PENGARUH VARIASI PENAMBAHAN ZEOLIT PADA PEMBUATAN BAHAN BAKAR ALTERNATIF DARI OLI BEKAS DENGAN METODE DESTILASI Imron, Imron Musthofa; Rusuminto Syahyuniar; Kurnia Dwi Artika; Hajar Isworo; Reza Taufiqi Ivana
ELEMEN : JURNAL TEKNIK MESIN Vol. 10 No. 2 (2023)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v10i2.270

Abstract

Used oil waste increases every year, engine maintenance waste will increase. Waste oil is classified as B3 waste which requires special treatment. In the development of cities and regions, the amount of fuel used continues to increase due to the increasing number of vehicles and car engines. Even in rural areas, you can find small companies, one of which uses oil. In other words, the distribution of palm oil waste is very wide, ranging from big cities to rural areas in Indonesia. The research process was to convert used oil into constant-temperature heating oil by using a distillation process. The method used aims to find out the best results at temperatures and variations of the zeolite catalyst. 350oC produces 1005 ml of fuel in 90 minutes. While the lowest results were obtained without using a zeolite catalyst to produce 105 ml of fuel. Thus, the use of zeolite is easy and effective in weakening the bonds of the hydrocarbon chains in the oil.
PENGARUH DIAMETER PIPA NOZZLE PADA KINERJA TURBIN AIR PELTON SKALA LABORATORIUM Syaief, Adhiela Noer; Isworo, Hajar; Ivana, reza Taufiqi; Putra, Muhammad Rezki Fitri; Yasin, Muhammad Noor
ELEMEN : JURNAL TEKNIK MESIN Vol. 11 No. 1 (2024)
Publisher : POLITALA PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34128/je.v11i1.276

Abstract

Pelton turbine is an energy conversion medium that utilizes flow performance as a driver and produces electrical energy due to the conversion of turbine rotation. The turbine works when the turbine nozzle injects flow towards the tip of the nozzle which leads directly to the inlet surface of the turbine blade. In this research, we know the effect of nozzle diameter on the performance of turbines that produce different electrical power from various parameters, namely: nozzle diameter used; 1", ¾", 1 ½", and ½" with various nozzle opening variations of 20%, 50%, and 100%. The results obtained with a nozzle diameter of ¾" obtained maximum results with a rotation of 177 (rpm), with a power of 5,168 watts and efficiency increased to 5% at each nozzle valve opening. From these results it can be said that the magnitude or size of the nozzle influences the performance of the turbine where the efficiency of the performance is directly proportional to the rotation and power produced.
Torque (Performance) Analysis, Exhaust Gas Emissions and Exhaust Flow Modeling Variation of Catalytic Converter Filter Number Hajar Isworo; Kurnia Dwi Artika; Muhammad Khalil; Imron Mustofa
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 24 No. 3 (2024): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v24i3.101-109

Abstract

In a combustion engine, to generate torque, a combustion and compression process is required. Apart from obtaining mechanical energy, the combustion results also produce exhaust emissions, which can result in a polluted environment. This research aims to determine the influence of torque and exhaust gas emission modeling by using variations in the number of filters using simulation software. This research is descriptive and quantitative research with an experimental method. This research uses a Dyno test tool and a Gas Analyzer from this research to find out data from the exhaust that has been varied. The addition of a filter reduces the torque value by 1.7%. The presence of a filter on the catalytic converter has been proven to reduce levels of exhaust emissions that are harmful to the environment (CO, HC). Of the variations in the number of catalytic converters, filter number 2 is the best, producing 9.71 hp with CO emission levels of 1.7% and HC 553 PPM.
Characteristics of Peat Water and Coconut Water Molecules in the Electrolysis Process to Produce Hydrogen Gas Imron Musthofa; Reza Taufiqi Ivana; Hajar Isworo; Adhiela Noer Syaief; Rusuminto Syahyuniar; Muhammad Rezki Fitri Putra
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 2 (2025): July
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i2.78-84

Abstract

Hydrogen energy is one of the alternative energies that will help overcome the scarcity of fossil energy. One of the steps to produce hydrogen energy is by the electrolysis method. In this study, the electrolysis process was carried out with a combination of peat water and coconut water. Given that in the South Kalimantan area the existence of peat land is very extensive and there are also many coconut trees. So the main raw materials used can be renewed. In addition, the composition contained in peat water can also help in the electrolysis process which consists of metal minerals such as Na, Mg, Al, Fe, Ca, K, and others. These mineral compounds will also help in accelerating the formation of hydrogen gas. The mineral compounds contained in coconut water and peat indirectly produce electrolyte properties and can be used as catalysts to accelerate the reaction to produce hydrogen gas by the electrolysis method. From the results of the research conducted, as much as 155 ml of hydrogen was produced. Hydrogen gas production, 0.6 A of electric current, and 7.3 Watts of electric power in the 30-minute electrolysis process were found in sample F (1.5 L of pure coconut water). In the electrolysis process, peat water and coconut water, the voltage used during the electrolysis process was 12 V which flowed through the cathode and anode.
Utilization of Corn Cob Waste as an Alternative Catalyst in Catalytic Converters for Diesel Engine Carbon Emission Reduction Muhajir Muhamad; Imron Musthofa; Hajar Isworo; Muhammad Rezki Fitri Putra; Bayu Agung Wicaksono
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 25 No. 3 (2025): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/logic.v25i3.140-146

Abstract

Catalytic converters function to transform harmful exhaust gases into less hazardous substances through catalytic reactions, primarily oxidation and reduction. This study aims to investigate the potential of corncob waste as an alternative catalytic material in catalytic converters for reducing carbon emissions from diesel engines. The methodology involves synthesizing biochar-based catalysts derived from corncobs via pyrolysis, followed by performance evaluation within a catalytic converter system under varying engine speeds: 700 RPM, 900 RPM, and 1100 RPM. Experimental results demonstrate that catalytic efficiency does not increase monotonically with char content; instead, the 70% char formulation achieved the highest smoke opacity reduction, recording 18.90% at 700 RPM and 14.70% at 900 RPM, outperforming both the 50% and 100% variants at 1100 RPM, where exhaust temperature and flow rate increase substantially, the 100% char catalyst showed comparatively greater stability, achieving a reduction of 5.50%, while the 70% formulation declined to 2.90%. These quantitative outcomes confirm that optimal performance arises from a balanced char loading that maximizes reactive surface area while preserving gas–solid interaction efficiency. Corncob biochar thus represents a viable and sustainable alternative to metal-based catalysts. However, the variability in performance across operating conditions and the need for improved thermal durability underscore the importance of further material optimization for commercial diesel applications.
ANALISIS TEGANGAN DAN DISPLACEMENT PADA FRAME ALAT ROLL BENDING Isworo, Hajar; Khalil, Muhammad; Syahyuniar, Rusuminto; Syaief, Adhiela Noer; Bela Persada, Anggun Angkasa; Lingga, Yulima Melsipa; Artika, Kurnia Dwi; Saputra, Remo Hadi
JTAM ROTARY Vol 8, No 1 (2026): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v8i1.17469

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh variasi profil rangka, yaitu besi kotak, besi siku, dan besi U, terhadap respons mekanik rangka alat manual roll bending menggunakan simulasi numerik. Parameter yang dianalisis meliputi tegangan normal, displacement, serta tegangan geser arah Tx dan Ty. Hasil simulasi menunjukkan bahwa profil besi siku menghasilkan nilai tegangan normal, tegangan geser, dan displacement tertinggi, yang mengindikasikan kekakuan struktural paling rendah dan potensi deformasi terbesar. Profil besi kotak menunjukkan kinerja struktural paling stabil dengan nilai tegangan dan displacement yang relatif rendah, sedangkan profil besi U menghasilkan tegangan rendah namun berpotensi mengalami ketidakstabilan akibat penampang terbuka. Berdasarkan hasil tersebut, dapat disimpulkan bahwa profil besi kotak merupakan pilihan paling sesuai untuk rangka alat manual roll bending karena mampu memberikan kekakuan tinggi, distribusi tegangan yang lebih merata, serta deformasi minimum, sehingga mendukung kestabilan dan presisi proses pembengkokan. This study aims to analyze the effect of different frame profiles—square hollow section, angle section, and U-channel—on the mechanical response of a manual roll bending machine frame using numerical simulation. The evaluated parameters include normal stress, displacement, and shear stresses in the Tx and Ty directions. The simulation results indicate that the angle section exhibits the highest normal stress, shear stress, and displacement, reflecting the lowest structural stiffness and the greatest deformation risk. The square hollow section demonstrates the most stable structural performance, characterized by lower stress levels and minimal displacement. Meanwhile, the U-channel shows relatively low stress values but presents potential instability due to its open cross-sectional geometry. Based on these findings, it can be concluded that the square hollow section is the most suitable profile for the main frame of a manual roll bending machine, as it provides higher stiffness, more uniform stress distribution, and minimal deformation, thereby ensuring structural stability and bending precision.
Co-Authors Abdul Ghofur Abdul Ghofur Adhiela Noer Syaief Adi Setiawan, Muhammad Yusuf Akhmad Syarief Andhika, Muhammad Yusuf Andy Nugraha Anggun Angkasa Bela Persada Bayu Agung Wicaksono Bela Persada, Anggun Angkasa Candra Dwi Putra Dhenny Sumantri Fahriansyah, Rohmat Fahrozi, Ikhsan Gunawan Rudi Cahyono Ika Kusuma Nugraheni Imron Musthofa Imron Musthofa Imron Mustofa Imron, Imron Musthofa Ivana, Reza Taufiqi Joni Riadi Kurnia Dwi Artika Kurnia Dwi Artika Kurnia Dwi Artika, Kurnia Dwi Lingga, Yulima Melsipa M. Reynaldi Perdana Saputra Ma'ruf Ma'ruf Maruf Maruf Muhajir Muhamad Muhamad Noor Yasin Muhammad Ibnu Candra Muhammad Khalil Muhammad Khalil, Muhammad Muhammad Rezki Fitri Putra Muhammad Rusdieanoor Mujiburrohman, Ahmad Najib Rahman Pamuji, Dian Ridlo Persada, Anggun Angkasa Bela Pratama, Trendy Pratama, Widya Agung Putra, Muhammad Rezki Fitri Putra, Muhammad Rezky Fitri Rachmat Subagyo Rachmat Subagyo Rendy Bagus Kurniawan Rendy Zakaria Reza Taufiqi Ivana Reza Taufiqi Ivana Riyan Nur Hidayah Rohmat Fahriansyah Rusdi, M. Zainul Rusuminto Syahyuniar Rusuminto Syahyuniar Saputra, Remo Hadi Setiawan, Muhammad Yusuf Adi Syahyuniar, Rusuminto Syaief, Adhiela Noer Yasin, Muhammad Noor Yulima Melsi Lingga