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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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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.
Effect of Variation of Mixture (Wood Gelam+Rice Husk) on Bio-Pellet on the Value of Temperature, Rate and Pressure of Combustion Subagyo, Rachmat; Nugraha, Andy; Isworo, Hajar; Pratama, Trendy; Rusdi, M. Zainul
Civil and Environmental Science Journal (CIVENSE) Vol. 5 No. 2 (2022)
Publisher : Fakultas Teknik Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2022.00502.5

Abstract

The increasing demand for energy causes the depletion of fuel fossil. To overcome this, it is necessary to utilize biomass and biomass waste. The purpose of this study was to simulate the effect of bio-pellet density on temperature, rate and pressure of combustion made from a mixture of gelam wood and rice husk. The method uses ANSYS simulation with literature review. The results showed that the increasing composition of rice husks had an effect on the decreasing combustion rate, this was due to the calorific value of the pellets making up the material. Where the lower calorific value of rice husk has an effect on the rate of combustion. Pellets that have a large density affect the rate of combustion so that it extends the burning time. The density of pellets is influenced by the pressure of pellet molding, the greater the pressure makes the fuel denser and has a large density. The highest combustion air pressure occurs at 100% gelam composition and the lowest at 100% husk composition. This shows that the addition of rice husk composition reduces the combustion pressure and vice versa applies to the addition of gelam composition.
RANCANG BANGUN ALAT PRESS KALENG MINUMAN BERBAHAN DASAR PELAT ALUMUNIUM KAPASITAS 530/JAM Isworo, Hajar; Khalil, Muhammad; Syahyuniar, Rusuminto; Syaief, Adhiela Noer; Persada, Anggun Angkasa Bela; Lingga, Yulima Melsipa; Artika, Kurnia Dwi; Setiawan, Muhammad Yusuf Adi
JTAM ROTARY Vol 5, No 1 (2023): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v5i1.8370

Abstract

Masalah yang terjadi adalah adanya limbah kaleng bekas di masyarakat.  yang biasanya berbahan dasar pelat alumunium, seperti yang kita ketahui sampah berbahan dasar logam susah terurai  di dalam tanah. Biasanya sampah kaleng ini dipungut oleh para pemulung dan disetor ke para pengepul. Tujuan dari penelitian ini membantu para pengepul dalam pengepresan kaleng, harapannya dengan cara pengepresan kaleng maka akan memperkecil volume kaleng sehingga dapat mengurangi ongkos pengiriman ke pabrik pencacah. pembuatan alat pengepresan kaleng dapat menghasilkan kaleng yang sudah dipres 530 per Jam. The problem that occurs is the presence of used cans in the community. which are usually made from aluminum plates, as we know metal-based waste is difficult to decompose in the soil. Usually, the cans are collected by the scavengers and handed over to the collectors. The purpose of this study is to help collectors in pressing cans, it is hoped that by pressing cans it will reduce the volume of cans so that they can reduce shipping costs to the enumerator factory. the manufacture of can presses can produce 530 pressed cans per hour.
PENGARUH CATALYTIC CONVERTER BERBAHAN ALUMUNIUM, SENG TERHADAP KEMAMPUAN REDUKSI EMISI GAS BUANG, DAN PERFORMA PADA SEPEDA MOTOR 110 CC Isworo, Hajar; Khalil, Muhammad; Syahyuniar, Rusuminto; Syaief, Adhiela Noer; Bela Persada, Anggun Angkasa; Lingga, Yulima Melsipa; Artika, Kurnia Dwi; Adi Setiawan, Muhammad Yusuf
JTAM ROTARY Vol 6, No 2 (2024): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v6i2.12322

Abstract

Masalah emisi gas buang akan terus berlangsung selama manusia menggunakan bahan bakar fosil. Emisi gas buang dapat diturunkan dengan menggunakan katalis yang terbuat dari berbagai macam material, seperti aluminium, tembaga, seng, dan lainnya. Sehingga penelitian ini dilakukan untuk mengetahui pengaruh penggunaan jenis matrial katalis alumunium dan seng terhadap emisi gas buang HC dan CO. Metode yang digunakan dalam penelitian ini dengan menguji Katalitik converter menggunakan uji eksperimental menggunakan alat uji emisi dan dyno test (uji performa mesin). Dari penelitian diketahui bahwa kadar CO dan HC  terendah pada penggunaan katalis alumunium 2 saringan dengan torsi sebesar 5.69 dan power sebesar 3,9 hp. Menurunnya emisi gas buang karena katalis alumunium dan seng terbukti efektif menurukan kadar CO dan HC. The problem of exhaust emissions will continue as long as humans use fossil fuels. Exhaust gas emissions can be reduced by using catalysts made from various materials, such as aluminum, copper, zinc, and others. So this research was carried out to determine the effect of using aluminum and zinc catalyst materials on HC and Co exhaust emissions. The method used in this research is to test the catalytic converter using experimental tests using emission test equipment and dyno tests (engine performance tests). From the research, it is known that the lowest CO and HC levels are when using  2 filter aluminum catalyst with a torque of 5.69 and a power of 3.9 hp. Reduced exhaust emissions due to aluminum and zinc catalysts proven to be effective in reducing CO and HC levels.
PENGARUH KETINGGIAN ENGINE STAND SEPEDA MOTOR TERHADAP NILAI KEKUATAN MATERIAL (TEGANGAN DAN DEFLEKSI) Isworo, Hajar; Khalil, Muhammad; Syahyuniar, Rusuminto; Syaief, Adhiela Noer; Bela Persada, Anggun Angkasa; Lingga, Yulima Melsipa; Artika, Kurnia Dwi; Fahrozi, Ikhsan
JTAM ROTARY Vol 5, No 2 (2023): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v5i2.9765

Abstract

Kegagalan material berakibat komponen otomotif bisa menjadi patah, selain itu dapat berakibat chassis suatu kendaraan menjadi megalami lendutan (defleksi).  Faktor yang mempengaruhi kegagalan adalah beban pada suatu komponen kendaraan. Tujuan dari penelitian ini adalah untuk menganalisa tegangan dan defleksi pada engine stand sepeda motor akibat pembebanan. Engine stand menggunakan variasi ketinggian 40 cm, 45 cm dan 50 cm dengan bantuan software Autodesk Inventor Professional 2019. Hasil penelitian menunjukkan ketinggian 40 cm adalah ukuran ketinggian yang paling baik, karena tegangan normal (Smax), tegangan geser Tx, dan defleksinya minimum, walaupun pada nilai tegangan shear stress Ty nya nilainya lebih tinggi dari ukuran lainnya, tetapi nilainya sangat kecil dibandingkan Tegangan yieldnya (0,6 MPa < 207 MPa ). Hal ini berdampak positif pada rangka engine stand karena tidak terjadi deformasi plastis (rangka tidak akan patah). Material failure can cause automotive components to break, besides that it can cause a vehicle's chassis to experience deflection (deflection). Factors that affect failure is the load on a vehicle component . The purpose of this research is to analyze the stress and deflection on the motorcycle engine stand due to loading. The engine stand uses height variations of 40 cm, 45 cm and 50 cm with the help of Autodesk Inventor Professional 2019 software. The results showed that a height of 40 cm is the best measure of height, because the normal stress (Smax), shear stress Tx, and deflection are minimum, even though the shear stress value Ty is higher than the other sizes, the value is very small compared to the yield stress. (0.6 MPa < 207 MPa ). This has a positive impact on the engine stand frame because plastic deformation does not occur (the frame will not break).
ANALISA KEGAGALAN POROS RODA BELAKANG (STUDI KASUS) PADA TRUK X Pratama, Widya Agung; Isworo, Hajar
JTAM ROTARY Vol 4, No 2 (2022): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v4i2.6664

Abstract

Truk merupakan kendaraan yang berfungsi sebagai pengangkut barang untuk didistribusikan ke suatu tempat. Truk adas juga disusun beberapa komponen salah satu komponennya adalah poros gardan. Poros gardan merupakan poros penggerak yang berfungsi meneruskan gaya penggerak dari differential ke roda. Seringkali terjadi kegagalan pada gardan belakang, hal ini tentunya akan mempengaruhi laju distribusi barang. oleh karena itu penelitian diperlukan ketika kegagalan lebih lanjut terjadi untuk meminimalkan kegagalan di masa depan. Penelitian ini menggunakan dua metode, yaitu fraktografi dan pengujian komposisi. hasil pengujian komposisi didapatkan bahwa material tersebut merupakan baja paduan dengan standar AISI 4140 dan tidak ditemukan masalah. Dari pengamatan fraktografi hingga pengamatan visual, ditemukan bahwa beach mark merupakan karakteristik dari pembebanan berulang. Pada saat diperoleh perbesaran terdapat retak sebelum terjadi beachmark dan sebelum ujung sesar terdapat permukaan yang rata akibat konsentrasi tegangan pada saat komponen poros poros mengalami kegagalan. A truck is a vehicle that functions as a carrier of goods to be distributed to a place. The truck is also arranged fennel several components one of the components is the axle shaft. The axle shaft is the drive shaft that functions to continue the driving force from the differential to the wheel. Often there is a failure on the rear axle, this will certainly affect the rate of distribution of goods. therefore research is needed when further failure occurs to minimize future failures. This study uses two methods, namely fractography and composition testing. the results of the test composition obtained that the material is an alloy steel with AISI 4140 standards and no problems were found. From fractographic observations to visual observations, it is found that the beachmark is a characteristic of repeated loading. When an enlargement is obtained there is a crack before the beachmark occurs and before the end of the fault there is a flat surface due to stress concentration when the axle shaft component fails.
Friction Modeling of Composite Brake Pads with Ulin Wood Powder (Eusideroxylon zwageri) Putra, Muhammad Rezki Fitri; Isworo, Hajar; Yasin, Muhamad Noor; Subagyo, Rachmat
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 2 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i22024p520

Abstract

This study investigates the performance of composite brake pads made of Ulin (Eusideroxylon zwageri) sawdust using simulation modeling, focusing on the pressure distribution, frictional stress, and contact state in five brake pad designs (DS0 to DS4). The brake pad designs used U-shaped grooves to improve cooling efficiency and debris removal. The results show that DS1 and DS2 exhibit the most uniform pressure distribution, with maximum values of 0.045 MPa and 0.048 MPa, respectively. DS1 recorded the highest peak frictional stress at 2.53 × 10-8 MPa, while DS2 showed consistent stress stability, reducing the possibility of uneven wear. DS3 achieved a balanced performance, with a maximum pressure of 0.062 MPa and a stable frictional stress distribution. In contrast, DS4 showed the highest stress (0.072 MPa) and increased “sliding” contact area, indicating reduced braking efficiency and potential for faster wear. Contact condition analysis showed predominantly “sticky” conditions on DS1, DS2, and DS3, which contributed to effective braking performance, while DS4 exhibited significant “sliding” conditions, which reduced friction efficiency. These findings confirm the potential of Ulin sawdust as an environmentally friendly brake lining material, with DS1 and DS2 emerging as the most suitable designs to achieve optimal braking performance and long life.
Torque (Performance) Analysis, Exhaust Gas Emissions and Exhaust Flow Modeling Variation of Catalytic Converter Filter Number Isworo, Hajar; 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.
PENGARUH VARIASI PUTARAN V-BELT MESIN PENCACAH RUMPUT TERHADAP KECEPATAN PEMOTONGAN Isworo, Hajar; Khalil, Muhammad; Syahyuniar, Rusuminto; Syaief, Adhiela Noer; Bela Persada, Anggun Angkasa; Lingga, Yulima Melsipa; Artika, Kurnia Dwi; Mujiburrohman, Ahmad
JTAM ROTARY Vol 7, No 1 (2025): JTAM ROTARY
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jtam_rotary.v7i1.13563

Abstract

Peternak membutuhkan alat bantu yang dapat memaksimalkan efisiensi dalam proses pencacahan rumput, sehingga dapat menghemat waktu dan tenaga yang dikeluarkan. Dengan demikian, proses pencacahan rumput dapat dilakukan dalam waktu yang lebih singkat. Oleh karena itu, alat pencacah rumput menjadi kebutuhan penting bagi para peternak. Secara umum, mesin pencacah rumput terdiri dari motor sebagai penggerak, sistem transmisi sebagai pemindah tenaga, casing untuk melindungi komponen mesin, poros rangka, dan pisau panjang. Dalam pembuatan mesin pencacah, penting untuk memperhatikan kekuatan rangka, ketajaman pisau yang mampu bertahan dalam banyak pemakaian, serta performa mesin yang maksimal sesuai dengan fungsi dan kebutuhan. Metode yang digunakan dalam penelitian ini melibatkan variasi ukuran pulley. Hasilnya menunjukkan bahwa pulley kecil dengan kecepatan putaran 500 rpm mampu mencacah 1 kg rumput dalam waktu 40 detik, sedangkan pulley besar dengan kecepatan 1500 rpm membutuhkan waktu lebih lama, yaitu 118 detik untuk mencacah 1 kg rumput. Farmers need tools that can maximize efficiency in the grass chopping process, helping them save both time and energy. This enables the grass chopping process to be completed in a shorter amount of time. Therefore, a grass chopper is an essential tool for farmers.In general, a grass chopper consists of a motor as the driving force, a transmission system to transfer power, a casing to protect machine components, a frame shaft, and long blades. When designing a grass chopper, it is crucial to consider the strength of the frame, the sharpness of the blades to withstand multiple uses, and the overall performance of the machine to ensure it functions optimally according to its intended purpose.The method used in this study involved variations in pulley sizes. The results showed that a small pulley with a rotation speed of 500 rpm could chop 1 kg of grass in 40 seconds, whereas a large pulley with a rotation speed of 1500 rpm took longer, requiring 118 seconds to chop 1 kg of grass.
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.
Co-Authors Abdul Ghofur Abdul Ghofur Adhiela Noer Syaief Adhiela Noer Syaief Adi Setiawan, Muhammad Yusuf Akhmad Syarief Andhika, Muhammad Yusuf Andy Nugraha Anggun Angkasa Bela Persada 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 Muhamad Noor Yasin Muhamad, Muhajir Muhammad Ibnu Candra Muhammad Khalil Muhammad Khalil Muhammad Khalil, Muhammad Muhammad Rezki Fitri Putra Muhammad Rusdieanoor Mujiburrohman, Ahmad Musthofa, Imron 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 Riyan Nur Hidayah Rohmat Fahriansyah Rusdi, M. Zainul Rusuminto Syahyuniar Rusuminto Syahyuniar Setiawan, Muhammad Yusuf Adi Syahyuniar, Rusuminto Syaief, Adhiela Noer Wicaksono, Bayu Agung Yasin, Muhammad Noor Yulima Melsi Lingga