Article Per Year (5 Year)
p-Index From 2021 - 2026
2.994
P-Index
This Author published in this journals
All Journal Rekayasa Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Jurnal Teknik Mesin Dharma Raflesia : Jurnal Ilmiah Pengembangan dan Penerapan IPTEKS TEKNOSIA Jurnal Polimesin Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Dharmakayana: Journal of scientists, engineers, educators and scientific activists related to society development
Yovan Witanto
Program Studi Teknik Mesin, Fakultas Teknik, Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

Published : 23 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 23 Documents
Search

 1   2   3 
EFEKTIVITAS COOLING TOWER FAN 6P - 4051 – GB. DI PT. PUPUK SRIWIDJAJA SEKTOR STG – BB, PALEMBANG, SUMATERA SELATAN Triyansah, Olga; Witanto, Yovan
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 1 (2020): April 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i1.13272

Abstract

PT. Pupuk Sriwidjaja uses several cooling systems, one of which is the Cooling Tower Fan 6p - 4051 - GB cooling system. The cooling system is used for production machines especially in turbines. This practical work report will discuss the effectiveness of Cooling Tower Fan 6p - 4051-GB, by processing data on the temperature of incoming water, outlet water temperature, wet blub temperature and flow rate of water, then the calculation of actual data is then compared with ideal conditions, thus will be known how the performance of the Cooling Tower Fan 6p - 4051 - GB. From the analysis the ideal effectiveness value is 66.66% while for the actual effectiveness value is 64.5301%, the effectiveness decreases 2.136%. This is due to heat transfer from the system to the environment or vice versa. From the results of the analysis it can be seen in the data that the water temperature comes out at 10:00 always increases compared to the other hours. This is because at 10.00 the sunlight directly leads to the cooling tower water reservoir and on rainy days the effectiveness of the cooling tower will increase
Analisa Pengaruh Variasi Diameter Tabung dan Jarak Katup Buang Limbah terhadap Unjuk Kerja Sistem Pompa Hidrolik Ram [Pompa Hidram] Puspawan, Angky; Suandi, Agus; Witanto, Yovan; Putra, Shandy Tri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 4 No. 2 (2020): Oktober 2020
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v4i2.18395

Abstract

Pompa hidram adalah salah satu jenis pompa yang energi atau tenaga penggeraknya berasal dari tekanan atau hantaman air yang masuk ke dalam pompa melalui pipa. Masuknya air yang berasal dari berbagai sumber air ke dalam pompa harus berjalan secara kontinyu. Pompa hidram memiliki banyak keuntungan dibandingkanpenggunaan jenis pompa air lainnya, diantaranya tidak membutuhkan pelumasan, bentuknya sangat sederhana, pembuatan dan pemeliharaanya lebih murah. Selain itu pompa ini mampu bekerja 24 jam per hari. Beberapa hal yang dapat mempengaruhi efisiensi pompa hidram ini, seperti tinggi masukan air, jarak katup buang limbah, dandiamater volume tabung. Pada penelitian ini diameter pipa yang digunakan adalah pipa diameter 2,5 inch, 3 inch, dan 4 inch dengan variasi volume tabung 0,0006 m3, 0,0013 m3, 0,0027 m3, dan 0,0040 m, pada jarak katup buang limbah divariasikan 50 mm, 75 mm, dan 100 mm, sedangkan tinggi masukan 1 meter. Dari hasilpengujian dan data hasil perhitungan didapat efisiensi maksimum 82,50% pada volume tabung 0,0027 m diameter pipa 4 inch, tinggi masukan air 1 meter, dan jarak katup buang 75 mm, sedangkan efisiensi terendah didapat pada volume tabung 0,0040 m3 diamater pipa 4 inch, pada jarak katup buang limbah 50 mm, dan tinggimasukan air 1 meter dengan nilai efisiensi 60,00%.
The Effect of Main Spindle Speed of Z3050 X 16 (II) Radial Surving Machine on HSS TOOL Wear on The ASTM A36 Steel Process Hutapea, Gumarang; Nurbaiti, Nurbaiti; Witanto, Yovan; Hoten, Hendri Van
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 2 (2021): Oktober 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v5i2.20171

Abstract

Radial drilling machine is a machine that functions to make holes, enlarge holes, smooth the surface of holes and others. The purpose of this study was to determine the effect of variations in the main spindle speed and to determine the cutting parameters of drilling with variations in the main spindle rotation of the machine 250, 320, and 400 rpm. The drill bits used in this study are HSS (High Speed Steel) chisels with a size of 16 mm and the material used is ASTM A36 steel. The method used to determine the level of tool wear is to calculate the reduction in tool weight every 8 times drilling at each speed variation, namely 250, 320, and 400 rpm. The greatest tool wear occurs at the highest engine rpm speed at 400 rpm with a tool wear value of 0.07 grams and the lowest wear at 250 rpm with a wear value of 0.02 grams. The depth of cut is 8 mm. The cutting speed at 250 rpm got a value of 0.01256 m/min, the cutting speed at 320 rpm got a value of 0.0160768 m/min and at 400 rpm the value was 0.020096 m/min. The cutting time at 250 rpm was 0.16mm/minute, the cutting time at 320 rpm was 0.125 mm/minute, the cutting time at 400 rpm was 0.1mm/minute. The speed of producing fury at a speed of 250 rpm obtained a value of 10.048 cm3/minute, at a speed of 320 rpm a value of 12.861 cm3/minute was obtained, and at a speed of 400 rpm a value of 16.076 cm3/minute was obtained.
ANALISIS PERFORMANCE POMPA FEED SENTRIFUGAL Erwinsyah, Mochamad Dava Erwinsyah; Bismantolo, Putra; Witanto, Yovan
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 7 No. 1 (2023): April 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v7i1.30103

Abstract

To support the optimization of operations at a refinery, a tool is urgently needed that can help process crude oil into a product. The centrifugal feed pump P-100/4 is a pump that operates in a distillation unit where the distillation unit functions to process oil from crude oil into products such as residue, diesel ph, diesel, kerosene, naptha and petrasol. The centrifugal feed pump P-100/4 aims to pump crude oil from tanks 101 and 102 to provide feed to furnace 5, before entering the crude oil furnace which is preheated in heat exchangers 1,2,3 to 4. The P-100/4 feed centrifugal pump is driven by a motor. In this paper more focused on the operation and maintenance of centrifugal pump P-100/4 feed. This data collection method is carried out by conducting interviews with field supervisors, and observing the pump unit directly, and other supporting books. The results obtained are: With a good and correct pump operator system and with capable and skilled operators, the pump operation will always be in good condition, and the life of the pump will be longer. The NPSHa value of the P. 100/4 mash pump meets the operating specifications, which is greater than the NPSHr. So the P.100/4 pump does not experience cavitation so the pump work is very stable. The efficiency price of the P. 100/4 feed pump is 68.40%
ANALISA KOEFISIEN PRESTASI (COP) MESIN PENDINGIN PADA POWER HOUSE Witanto, Yovan; Zuliantoni; Aritonang, Jefri Fanto
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 1 (2024): April 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i1.36546

Abstract

Refrigeration machines that cool water are called chillers. Chillers are air conditioners with an indirect cooling system. In this indirect cooling system, the refrigeration machine does not directly cool the air in each room. The refrigeration machine cools the demin water first, then the cold demin water is used to cool the air in the room. Cold demin water as a cooling medium to reduce the temperature of a large space in the Power house. In this study, an Analysis of the Coefficient of Performance (COP) of the Cooler in the Power house was conducted. The data taken for this study were the temperature of the refrigerant when it was released from the expansion valve (T4 = 0 ° C), the temperature when it was released from the evaporator (T1 = 9 ° C) and the temperature when it was released from the compressor (T2 = 77 ° C). At T4 the enthalpy value (h4) was obtained as 204.81 kj/kg, at T1 the enthalpy value h1 was 253.025 kj/kg, at T2 the enthalpy value (h2) was 263.582 kj/kg. Thus, the coefficient of performance (COP) obtained was 4.567.
DESAIN DAN SIMULASI PEMBEBANAN STATIK SASIS KENDARAAN LISTRIK OTONOM TANPA KEMUDI UNTUK INDIVIDUAL MOBILITY MENGGUNAKAN SOFTWARE SOLIDWORK ricky, 240103; Witanto, Yovan; Supardi, Nurul Iman; Syabanda, Yukhi Mustaqim Kusuma
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 8 No. 2 (2024): Oktober 2024
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v8i2.39520

Abstract

The chassis or frame is the internal framework that serves as the basis for producing an object, supporting parts such as the engine or electronic components of the object. The chassis can be likened to the skeletal structure of animals.Electric cars are vehicles powered by electrical energy stored in batteries or other energy storage devices. Electric cars were very popular in the late 19th and early 20th centuries, but their popularity waned due to advancements in internal combustion engine technology and the decreasing cost of gasoline-powered vehicles. SolidWorks is a software application based on automation for creating 3D solid models to explore the use of Windows graphics. Using this software is not very difficult, depending on the user's willingness as an engineer to learn it. This software is highly useful in engineering for creating both 3D and 2D models. Additionally, SolidWorks can perform simulations that are highly beneficial for conducting research on machines or materials.
PREVENTIVE MAINTENANCE PADA COAL PREVENTIVE MAINTENANCE PADA COAL MILL (PULVERIZER) ISMAEL , ALIF RAHMAN PELDIANSYAH; Witanto, Yovan; Helmizar
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.v9i1.40176

Abstract

Coal mill (pulverizer) is used to grind coal into micro-sized particles suitable for combustion. This study aims to analyze the preventive maintenance applied to the coal pulverizer to prevent damage and improve operational efficiency. Preventive maintenance procedures include routine tasks such as visual inspection, lubrication, cleaning, and component tightening. During the process, problems such as hydraulic pipe leakage and other component malfunctions are identified and immediately addressed to prevent further impacts. Preventive maintenance has proven effective in minimizing the risk of unplanned downtime, supporting sustainable production, and improving the efficiency of the coal pulverizer. The operational principle of the pulverizer involves grinding coal between the grinding roller and the grinding table, assisted by airflow from the primary air fan to produce coal powder with a size of 200 mesh, ready for combustion in the burner. In conclusion, preventive maintenance is very important to maintain equipment performance, reduce potential damage, and ensure smooth production processes.
Analisis Distribusi Termal Model Tabung Rheology Test Apparatus Sebagai Media Pengujian Ultrafine Bubbles (UFBs) Nopriani, Meti Eliza; Puspawan, Angky; Witanto, Yovan; Budiman, Arif Adtyas
Jurnal Teknik Mesin Vol 18 No 1 (2025): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.18.1.1759

Abstract

The Fukushima Daiichi nuclear reactor accident has become a major concern in the development of safety design for advanced nuclear reactors. The reactor coolant system is part of the passive safety system, including the containment or reactor building cooling system. This system is designed to prevent damage to the reactor vessel structure and concrete building materials due to excessive heat release into the environment. The coolant flow is designed to move naturally without the help of a pump, utilizing the difference in fluid density as the main driver. The type of coolant plays a major role in generating the flow, especially in terms of its density properties. Fluids with a lower density than water can produce faster flow. One method to reduce the density of water is to insert fine bubbles known as ultrafine bubbles (UFB). To study the thermal characteristics of the fluid when heated, the Rheology Test Apparatus device is used. This study specifically examines the Rheology tube model. Analysis of temperature distribution in the tube is carried out using Computational Fluid Dynamics (CFD) simulations to understand the heat transfer mechanism. The validation process was carried out through experiments at a fluid temperature of 90°C, with a comparison of the temperatures at two points in the height of the tube, namely 0.16m and 0.8m, which are the locations of the heater and show the highest temperature.
AnalisisEffect of Ethanol–LPG Dual Fuel on Output Voltage Stability of a Four-Stroke Generator Witanto, Yovan; Nuramal, Agus; Pratama, Samuel Yoga; Helmizar, Helmizar; Rosa, Khairul Amri
TURBO [Tulisan Riset Berbasis Online] Vol 14, No 1 (2025): TURBO : Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v14i1.3767

Abstract

 This study aims to analyze the effect of load variation on the output voltage of a modified four-stroke generator using a dual-fuel system consisting of ethanol and liquefied petroleum gas (LPG). Ethanol 96% was used as the primary fuel, while LPG was injected through an ideal mixture screw with the aid of a converter kit, pressure regulator, and flowmeter to control gas flow. The test subject was a modified Yasuka 1500DC gasoline generator. Experiments were conducted using incandescent lamp loads ranging from 200 to 1000 watts, in 200-watt intervals, each applied for 2 minutes at a constant engine speed. The observed parameters included fuel consumption and output voltage. The LPG flow rates tested were 0.2, 0.4, 0.6, and 0.8 liters per minute. The results showed that the ethanol–LPG combination at a flow rate of 0.8 l/min produced the highest and most stable voltage output, remaining above the safe threshold of 198 volts. Compared to pure ethanol or gasoline, the dual-fuel system was more effective in maintaining voltage under high load conditions. This is attributed to LPG’s high calorific value and its ease of mixing with air, which enhances combustion quality. 
Pengaruh Campuran LPG Dan Udara Terhadap Kemudahan Penyalaan Awal Genset 4 Langkah Witanto, Yovan; Nuramal, Agus; Rosa, M. Khairul Amri
AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Vol. 8 No. 2 (2022)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/ame.v8i2.7095

Abstract

Selain sebagai bahan bakar kompor gas, Liquefied Petroleum Gas (LPG)  dapat dimanfaatkan sebagai bahan bakar genset. Untuk kemudahan penyalaan genset yang menggunakan LPG, diperlukan campuran LPG dan udara yang tepat. Tujuan penelitian ini yakni menganalisis pengaruh campuran LPG dan udara terhadap kemudahan penyalaan awal genset 4 langkah.  Metode yang digunakan dalam penelitian ini adalah metode eksperimen, yaitu menguji pengaruh variasi laju aliran gas LPG  dan  pengaruh variasi  bukaan katup saluran udara. Laju aliran LPG yang digunakan yakni 2 L/min, 3 L/min, 4 L/min. Udara yang masuk keruang bakar divariasikan dengan pengaturan bukaan katup yakni katup terbuka penuh, terbuka setengah dan tertutup rapat.  Hasil penelitian menunjukkan bahwa campuran yang paling tepat untuk kemudahan penyalaan awal genset yaitu pada variasi dengan laju aliran 3 L/min pada posisi katup ditutup rapat.  Saat katup ditutup rapat sebenarnya masih terdapat celah lobang udara pada choke dengan diameter 6 mm standart bawaan karburator. Udara yang dihasilkan dari lubang ini ternyata cukup efektif  saat dicampur LPG dengan laju aliran gas 3 L/min. Dengan demikian dapat disimpulkan bahwa genset LPG mudah dinyalakan jika campuran LPG dan udara tepat. 
Co-Authors Adhadi Kurniawan Afdhal Kurniawan Mainil Afif Chaniago Bastiar Agus Nuramal Agus Suandi Agus Suandi, Agus Angky Puspawan Anizar Indriani Anizar Indriani Anizar Indriani Anizar Indriani Aritonang, Jefri Fanto Benny Dwika Leonanda Bismantolo, Putra Budiman, Arif Adtyas Dedi Suryadi Eng Hendra Erwinsyah, Mochamad Dava Erwinsyah Helmizar Helmizar - Hendra Hendra Hendra Hendra Hendra Hendra Hendra Hendra Hendri van Hoten Hutapea, Gumarang ISMAEL , ALIF RAHMAN PELDIANSYAH Johan Johan Khairul Amri Khotso Sai Nopriani, Meti Eliza Nur ‘Azah Nurbaiti Nurbaiti Nurbaiti Nurcholish Windiharto Nurul Iman Supardi Prasetya Hariyanto, Kevin Pratama, Samuel Yoga Putra, Shandy Tri Rahmat Iman Mainil ricky, 240103 Rifki Sulthan Rosa, Khairul Amri Rosa, M. Khairul Amri Solly Aryza Syabanda, Yukhi Mustaqim Kusuma Triyansah, Olga Valentina, Pricylia Zuliantoni, Zuliantoni