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Zuliantoni, Zuliantoni
Universitas Bengkulu
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ANALISIS TEKANAN HIDROLIK TERHADAP OIL LOSSES PADA MESIN PRESS KAPASITAS 15 TON Tarigan, Daniel Elieser; Zuliantoni; Bismantolo, Putra
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.38827

Abstract

In palm oil processing, there are five main stages: sterilization, threshing, digestion, pressing, and clarification. Among these, the pressing stage is one of the most critical. The pressing machine is used to separate crude oil from the fibers in the fruit pulp. This machine includes a pressing component, commonly referred to as the cone cage, which is operated by a hydraulic mechanism. The palm oil pressing process plays a crucial role in determining the success of processing fresh fruit bunches (FFB), as significant oil losses often occur during this stage. One of the key factors affecting these losses is the value of the hydraulic pressure. This study aims to investigate the effect of hydraulic pressure on oil losses in fibers for each pressing machine and to understand how the pressing machine operates. To analyze the hydraulic pressure variable and oil losses in fibers, observations were conducted by monitoring the pressure gauge on each pressing machine. The oil losses in fibers were measured through laboratory testing at the factory. The collected data were then compared. The results of this study indicate that hydraulic pressure has a significant effect on oil losses in the fibers of the pressing machine. At a hydraulic pressure of 49 bar, the smallest oil loss was recorded at 3.28%, whereas at a hydraulic pressure of 40 bar, the highest oil loss was observed at 4.42%. This demonstrates that higher hydraulic pressure results in lower oil losses, and vice versa.
ANALISA DISTRIBUSI TEMPERATUR INTERMEDIATE TANK FASSIP-07 MENGGUNAKAN METODE COMPUTATIONALFLUID DYNAMICS (CFD) Prasetio, Dimas; Zuliantoni; Juarsa, Mulya; Ismarwanti, Sri; Kharisma, Sunandi
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 1 (2025): April 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i1.39825

Abstract

This study aims to understand the temperature distribution in the natural circulation system in the Intermediate Tank FASSIP-07 using the Computational Fluid Dynamics (CFD) method. Simulations were performed using Ansys Workbench R1 2024 software, with inlet temperature variations of 70°C, 80°C, and 90°C. The results showed that the highest temperature distribution was found at the inlet with a temperature of 90°C, while the outlet reached the lowest temperature at 70°C. This conclusion was obtained from the analysis of fluid flow driven by the buoyancy phenomenon due to differences in density. This study shows the potential for using a passive cooling system for nuclear reactors to improve safety in emergency conditions.
EFFECT OF PLATE THICKNESS AND ROLL GAP ON THE GEOMETRIC QUALITY OF ROLLING PRODUCTS Hendra, Hendra; Fauzan, Ahmad; Zuliantoni, Zuliantoni; Aswata, Aswata; Nugraha, Kurnia; Hermiyetti, Hermiyetti; Hernadewita, Hernadewita
Trends in Mechanical Engineering Research Vol 1, No 1 (2023): June
Publisher : Department of Mechanical Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/timer.v1i1.20496

Abstract

The folding gate is a middle frame flanked by cross bars on the back of the shop door which has a higher level of strength than the body of the door and has better security. The U folding profile is made by a plastic deformation rolling process in which the plate is passed between the pressing roll and the sliding roll. Flat plates are used from the base material of metal plates with varying plate thickness where the metal forming process uses a cold working process. Factors that affect the results of rolling are roll dimensions, machine capacity, roll pressure lever settings and others. The thickness of the plate that can be rolled by the machine, the amount of force exerted on the roll gap, the evenness of the roll surface both vertically and horizontally and the alignment of the roll gap. The thicker the material with a large pressure spacing can affect the forming process so that it enlarges the largest angular deviation of 0.761 mm at a pressure spacing of 0.0 mm. A thicker material with a large pitch can enlarge the wing opening so that both wings bend imperfectly making the height deviation increase by 18.58 mm at a pitch of 0.0 mm. Thinner material with a large press distance at the start of the roll affects the flange width so that the rolling force exerted on the contact gap between the roll and the workpiece side is unbalanced. Get the largest size b- (8.030 mm) 0.0 mm pressure distance and b+ (7.843) 0.15 mm pressure distance. 
Hydroxyapatite-reinforced Al-Mg composites for corrosion resistance in hanks' balanced salt solution zuliantoni, zuliantoni; Suprapto, W.; Setyarini, P.H.; Gapsari, F.
Jurnal Polimesin Vol 22, No 6 (2024): December
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v22i6.5473

Abstract

Aluminum-Magnesium (Al-Mg) matrix composites were fabricated using powder metallurgy. Ceramic particles such as synthetic hydroxyapatite and snail shell hydroxyapatite were used as reinforcing particles. Snail shell hydroxyapatite often shows superior corrosion resistance over manufactured hydroxyapatite because of its distinct structural integrity, biological compatibility, and trace element concentration. Aluminummagnesium matrix composites are lightweight metals with advantageous mechanical, physical, and density properties, making them suitable for applications in the automotive, aerospace, biomedical, and sports industries. However, their limited corrosion resistance has restricted their broader development and application. This study characterizes corrosion behavior of Al-Mg composites reinforced with HAss and HA bioceramic. Given that plastic deformation can improve corrosion resistance, powder metallurgy is one of the most promising techniques for improving a material's mechanical properties. Following HAss reinforcement testing, Al-Mg composites were contrasted. A compression pressure of 650 MPa was used to produce the samples at room temperature. Corrosion was measured using the potentiodynamic polarization electrochemical test in Hank's Balanced Salt Solution (HBSS). Out of all the AlMg/HAss composites, the 0.55Al-0.05Mg/0.40HAss composite exhibited the maximum corrosion resistance (9.58×10-4 mmpy), per the test results. 7.72×10-6 mmpy was the Al-Mg/HA composite's ideal corrosion resistance when combined with the 0.80Al-0.05Mg/0.15HA composite. The application of powder metallurgy in the production of the composites significantly improved their corrosion resistance. The Al-Mg/HAss AMC can also be used in biomaterials.
The Effect of Aluminum Addition Ratio as Filling Material of PLA Toward PLA Filament Electrical Conductivity on 3D Printing Applications Ridwan, Firman; Zuliantoni, Zuliantoni
METAL: Jurnal Sistem Mekanik dan Termal Vol. 8 No. 1 (2024): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.8.1.1-5.2024

Abstract

 The electronic waste of daily electronic goods evokes environmental pollution because electronic waste is difficult to decompose in nature and it is also toxic to the environment and humans. The way to minimize environmental pollution from electronic waste is by making polymer composites for conductive material purposes. Polylactic acid (PLA) has the potential as a polymer matrix. PLA has a non-toxic advantage and it is easily decomposed in nature because PLA is made from organic material.The extruder machine is used to make PLA filament with aluminum filling. When made the filaments, the ratio of each mixture was varied to obtain a filament with a mixture ratio that produced the best conductivity. The four-point probe test tool is used to measure the resistivity of each specimen to find out which specimen with the mixture ratio has the best conductivity value.The electrical conductivity obtained from the ratio of 10% Al is 6.78 S/m; 20% Al is 10 S/m; 30% Al is 31.44 S/m; 40% Al is 24.15 S/m. The best electrical conductivity results was obtained in the 70% PLA and 30% Al mixture ratio with an electrical conductivity value is 31.44 S/m while the lowest electrical conductivity was obtained in the 90% PLA and 10% Al mixture ratio with an electrical conductivity value is 6.67 S/m
Release of Hatchlings as an Implementation of Student Research Results in Turtle Conservation Efforts on the Coast of Bengkulu : Pelepasan Tukik sebagai Implementasi Hasil Penelitian Mahasiswa dalam Upaya Konservasi Penyu di Pesisir Bengkulu Dedi Suryadi; Zuliantoni; Agus Nuramal; A Sofwan FA
Dharmakayana Vol 2 No 1 (2025): Mei : Dharmakayana: Journal of scientists, engineers, educators and scientific ac
Publisher : Program Studi Teknik Mesin, Fakultas Teknik Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dk.v2i1.41461

Abstract

Kegiatan pelepasan tukik merupakan salah satu wujud nyata dari hasil penelitian mahasiswa yang berfokus pada upaya konservasi penyu, khususnya di wilayah pesisir Bengkulu. Program ini muncul sebagai respons terhadap penurunan populasi penyu yang disebabkan oleh perusakan habitat, perburuan liar, serta rendahnya kesadaran masyarakat tentang pentingnya pelestarian spesies ini. Dengan pendekatan yang partisipatif, kegiatan ini melibatkan mahasiswa, masyarakat lokal, dan mitra konservasi untuk meningkatkan pemahaman serta kepedulian terhadap pelestarian penyu. Metode yang diterapkan dalam kegiatan ini meliputi sosialisasi, edukasi lingkungan, serta pelepasan tukik ke habitat alaminya, yang menjadi simbol nyata dari sumbangsih ilmiah dan sosial mahasiswa dalam konservasi. Hasil dari kegiatan ini menunjukkan peningkatan pengetahuan masyarakat mengenai siklus hidup penyu dan pentingnya menjaga ekosistem pesisir. Selain itu, kegiatan ini juga memperkuat kolaborasi antara perguruan tinggi dan komunitas lokal dalam pengembangan program konservasi yang berkelanjutan. Diharapkan, kegiatan ini bisa menjadi model pengabdian masyarakat yang berbasis penelitian dan dapat dicontohkan di wilayah pesisir lainnya.
EVALUASI EFISIENSI DAN KINERJA MESIN RIPPLE MILL KAPASITAS 8 TON/JAM DALAM PENGOLAHAN KELAPA SAWIT Sipayung, Evraim; Zuliantoni; Puspawan, Angky
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 2 (2025): Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i2.40402

Abstract

Oil palm is a plant that produces palm oil which is widely known as Crude Palm Oil (CPO). Palm oil is refined into crude palm oil (CPO) and palm kernel. Kernel quality parameters include dirt content, water content and percentage of broken kernels. The kernel breaking process uses a Ripple mill machine. The Ripple mill machine is a part that determines the quality of the kernel in production at the kernel station and causes problems when the machine does not work effectively. Common problems faced by companies are frequent sudden machine breakdowns and production results do not meet the specified production criteria. In analyzing machine performance, both production and machine efficiency, the method is carried out by taking samples at the chute sampling point every 2 hours while the machine is operating with different sample weights. The sample is stirred until homogeneous so that whole nuts, broken nuts and broken kernels do not pile up. Then the sample is divided into four or quarts, take two opposite parts and put them in a container. The sample is weighed with a sample weight of 1 kg, pour the sample for analysis by separating whole nuts, broken nuts, and broken kernels. Then weigh the whole nuts and broken nuts, record the weighing results, from the weighing results do calculations using the formula to determine the efficiency of the Ripple mill.
ANALISIS RESPON DAYA PEMANAS PADA FASILITAS HEATING CONTROL Prasetya Hariyanto, Kevin; Zuliantoni; Witanto, Yovan; Valentina, Pricylia
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 9 No. 2 (2025): Oktober 2025
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v9i2.40634

Abstract

Currently the Fassip-01 strand to Fassip-07 uses a control system of two positions (on-off) in controlling heaters to maintain stopping conditions when experiments are carried out. Nuclear Termofluidal System Research Group Develops the Heating Control Facility that functions as a Heating Control System Test Facility using PID system control (proportional integral derivative) to overcome the problem of existing residual heat due to the use of the Kend system This test was conducted to find out the analysis of 4 heater power before the experiment took place and analyzed RTM (Risetime) Setpoint 40.45, and 50 degrees. In this experiment the method used was an experiment so that the results were obtained in the form of accuracy values, heater positions, high energy consumption, poor power settings, large residual heat and time difference ratio in each setpoint.
Analisis Sifat Mekanis Komposit Hibrida Serat Jute dan Fiberglass dengan Metode Vacuum Infusion Hestiawan, Hendri; Muhadjir, Muhammad Imron; Zuliantoni, Zuliantoni
JURNAL TEKNIK MESIN Vol 14, No 2 (2025): Oktober
Publisher : Universitas Bandar Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Abstrak. Penelitian ini bertujuan untuk menganalisis pengaruh susunan serat dan orientasi sudut terhadap sifat mekanis komposit hibrida berpenguat serat jute dan fiberglass menggunakan metode vacuum infusion. Serat jute dipilih karena sifatnya yang ramah lingkungan, dapat terurai secara hayati, serta ketersediaannya yang melimpah. Serat fiberglass digunakan untuk meningkatkan kekuatan mekanis komposit. Proses pembuatan spesimen dilakukan dengan variasi susunan dan orientasi serat menggunakan cetakan akrilik, sedangkan resin yang digunakan adalah vinylester Ripoxy R-802 EX-1 dengan perbandingan 100:10:0,25 antara resin, katalis, dan promotor. Pengujian meliputi uji impak (ASTM D5942), uji lentur (ASTM D790), dan uji tarik (ASTM D638). Hasil penelitian menunjukkan bahwa orientasi serat berpengaruh signifikan terhadap kekuatan mekanis komposit. Susunan Glass–Jute–Jute–Jute–Glass dengan orientasi sudut 0° menghasilkan kekuatan lentur tertinggi sebesar 158,78 MPa dan ketangguhan impak sebesar 28,51 kJ/m², sedangkan kekuatan tarik tertinggi sebesar 46,58 MPa diperoleh pada orientasi 45°. Dengan demikian, kombinasi susunan dan orientasi serat yang tepat dapat meningkatkan kekuatan mekanis komposit hibrida serat jute dan fiberglass
Pengenalan Pembuatan Paper Bag Dalam Meningkatkan Kreatifitas Siswa-siswi SMA Zuliantoni, Zuliantoni; Supardi, Nurul Iman; Suryadi, Dedi
Dharmakayana Vol 1 No 1 (2024): Mei : Dharmakayana: Journal of scientists, engineers, educators and scientific ac
Publisher : Program Studi Teknik Mesin, Fakultas Teknik Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dk.v1i1.36099

Abstract

Creative thinking can be fostered through simple things, such as handicrafts. Creative thinking can be fostered through simple things, such as handicrafts. Crafts can be interpreted as the result of a skill or craft that utilizes materials around us. One of the easiest handicrafts that can be done is making bags from paper. Paper bags are currently trending in Indonesia, especially in Bengkulu as a response to global warming. Problems identified among partners include ignorance in making paper bags, lack of packaging innovation. This community service aims to improve understanding of the use and management of paper bag businesses. The action steps that will be implemented are: 1) action preparation, 2) paper bag production training, and 3) monitoring and evaluation. Training is carried out using the sampling method and direct training for partners. The evaluation results show that the partners' understanding and skills have increased by an average of 45%. The partners already have an understanding and skills in the production and management of paper bag businesses.
Co-Authors A Sofwan FA Agus Nuramal Agus Suandi, Agus Alqa, A Sofwan F Alqap, A. Sofwan F Angky Puspawan Antonius F A Silaen Anwar, Moh. Syaiful Arie Vatresia Aritonang, Jefri Fanto Asrol Asrol Aswata, Aswata Bismantolo, Putra Dedi Suryadi F. Alqap, A. Sofwan FA, A. Sofwan Fauzan, Ahmad Febriyanto, Dwi Firman Ridwan Fitri, Tessa Zulenia Gapsari, F. Gunawan, Agustin Gunawan, Agustin Hardiansyah Hardiansyah Hardiyanto, Martin Hendra, Hendra Hendri Hestiawan Hendri van Hoten Hermiyetti Hernadewita, Hernadewita Hestiawan, Hendri Jhonni Rahman Khairul Amri Kharisma, Sunandi Muhadjir, Muhammad Imron Muhammad Farid Mulya Juarsa Nanda, Andany Rizka Nugraha, Kurnia Nurbaiti Nurbaiti Nurul Iman Supardi Panjaitan, Felix Budianto Prasetio, Dimas Prasetya Hariyanto, Kevin Purwo Subekti Razali, Makmun Reza Roby Syaputra Saragih, Fernando Desfriandi Setyarini, P.H. Sipayung, Evraim Sri Astuti Sri Ismarwanti, Sri Suprapto, W. Tarigan, Daniel Elieser Valentina, Pricylia Warsianto, Ardi Yose Rizal Yovan Witanto Yulianto, Dody