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Yovan Witanto
Program Studi Teknik Mesin, Fakultas Teknik Universitas Bengkulu
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Control & Systems Engineering Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Pemanfaatan Sensor Suhu LM 35 Berbasis Microcontroller ATmega 8535 pada Sistem Pengontrolan Temperatur Air Laut Skala Kecil Indriani, Anizar; Johan, Johan; Witanto, Yovan; Hendra, Hendra
Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (414.691 KB)

Abstract

System of temperature control are used in many facility such as room temperature control, quality control of food and drink, electronic equipment control and etc. control of temperature can be done by using microcontroller as a media processing and process the changes of temperature that occured to the voltage. One of supporting component on the microcontroller to detect the change of temperature is temperature sensor LM 35 which in this study we will focus on the temperature sensor LM 35 for detect of change of temperature on the sea water in a small scale. the purpose of this study is to determine the ability and performance of temperatur sensor LM 35 for detect the changes of temperature sea water and check the condition of temperatur sensor LM 35 in use on the sea water. The results show that the temperature sensor of LM 35 can be used to measure the changes of temperatur sea water without have higher difference on the actual value and experiment results. the range of difference is smaller and the temperature sensor of LM 35 can be used to measured the change of temperature of sea water.Keywords: LM 35 Sensor, Microcontroller ATmega 8535, Sea Water Temperature
Pelatihan Pembuatan Mesin Penetas Telur Puyuh Otomatis Untuk Meningkatkan Pendapatan Masyarakat di Kelurahan Sukarami Bengkulu Witanto, Yovan; Kurniawan, Adhadi; Indriani, Anizar
DHARMA RAFLESIA Vol 18, No 2 (2020): DESEMBER (ACCREDITED SINTA 5)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v18i2.13001

Abstract

Tujuan pengabdian kepada masyarakat ini adalah pelatihan pembuatan mesin penetas telur puyuh otomatis untuk meningkatkan pendapatan masyarakat di kelurahan Sukarami, Bengkulu. Khalayak sasaran pelatihan adalah masyarakat Kelurahan Sukarami  khususnya peternak burung puyuh. Pengabdian kepada masyarakat berbasis Ipteks ini akan dilakukan alih teknologi otomasi melalui pelatihan perencanaan, pembuatan dan penggunaan mesin penetas telur otomatis berbasis SMS dengan memanfaatkan Mikrokontroler. Materi pelatihan disampaikan secara online lewat youtube, kemudian  dilakukan kunjungan untuk ujicoba perakitan dan penggunaan alat di lokasi.  Hasil kegiatan menunjukkan bahwa tingkat kepuasan peserta sangat tinggi.  Permasalahan yang dihadapi mitra dapat diatasi dengan menggunakan alat penetas telur berbasis sms ini.  Waktu mereka yang selama ini terbuang dapat di atasi dengan info sms yang mereka terima dari alat ini.  Dengan demikian kegiatan pelatihan ini berhasil. Waktu yang selama ini terbuang untuk menunggui proses penetasan telur, dapat digunakan untuk bekerja di tempat lain. Dengan demikian pendapatan meningkat.   
PIPING AND BALLAST PUMP SELECTION FOR A TANK CARRIER SHIP Witanto, Yovan
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 3 No. 1 (2019): April 2019
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v3i1.9934

Abstract

Pump is a device used to move a liquid from a lower place to a higher place by giving energy to the liquid to be moved. Generally the pump is driven by a motor, turbine, engine, or the like.PT Daya Radar Utama Unit 3 Lampung company engaged in ship production or shipbuilding. On ships there is a balancing system or commonly called a ballast system which aims to balance the ship when the load is empty or full. Balancing used is in the form of sea water which is input into the ballast tank. Therefore there is a selection of pumps to adjust to the ballast reservoir used in a ship so that the time needed to fill the tank can be according to the needs. On warships carrying steel tanks, it is known that the volume of the ballast tank is1300m3with a planned time of 5 hours.  From the tank volume data that has been known, the capacity of the planned ballast pump can be calculated and the capacity obtained is260m3/h, the pipe diameter prediction value is suitable for use from the value of the ballast pump capacity of 8 "and the total head value is obtained to meet the needs based on the image design of the balaas system which is planned to be valued at 27.43m. From these data, the ballast pump can be selected according to the need for filling the ballast tank for 5 hours by selecting the pump specifications according to the total discharge and head obtained
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.
Co-Authors Adhadi Kurniawan Agus Nuramal Agus Suandi, Agus Angky Puspawan Anizar Indriani Aritonang, Jefri Fanto Bismantolo, Putra Budiman, Arif Adtyas Erwinsyah, Mochamad Dava Erwinsyah Helmizar Hendra Hendra Hendri van Hoten Hutapea, Gumarang ISMAEL , ALIF RAHMAN PELDIANSYAH Johan Johan Nopriani, Meti Eliza Nurbaiti Nurbaiti Nurul Iman Supardi Pratama, Samuel Yoga Putra, Shandy Tri ricky, 240103 Rosa, Khairul Amri Rosa, M. Khairul Amri Solly Aryza Syabanda, Yukhi Mustaqim Kusuma Triyansah, Olga Zuliantoni, Zuliantoni