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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

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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.   
PEMANFAATAN SISTEM PENGERING MENGGUNAKAN MIKROKONTROLERGENUINO UNO DAN SOLAR SELUNTUK PENGOLAHAN HASIL PERTANIAN MASYAKARAKAT DESA PASAR PEDATI DAN DESA HARAPAN Anizar Indriani; Eng Hendra; Yovan Witanto
DHARMA RAFLESIA Vol 15, No 2 (2017): DESEMBER
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i2.4055

Abstract

The daily life of the people in Pasar Pedati Village and Harapan Village, Central Bengkulu Regency, especially the housewives is processing agricultural products such as cassava, copra, and banana.Cassava is made into cassava chips and rengginang. This devotional activity aims to transfer technology and science in processing agricultural products and help villagers to create versatile dryers.This versatile drying machine works by utilizing solar and heat energy absorbed by copper plates where the heat is insulated using a glass layer.Heat utilization is made by copper plate so it must be made with transparent glass design on the top and around the wall of the dryer.The frame of the glass stand is made of aluminum and is assembled using a rivet.The process of choosing and making of this drying machine involves the people of Pasar Pedati Village and Harapan Village, both men and women. Most of the men in Pasar Pedati Village work on farming and also work outside the village, so that during the day there are housewives working on the process of drying their crops.With this versatile drying machine training, Pasar Pedati and Desa Harapan villagers are particularly enthusiastic in training. Because these dryers are very helpful for them in processing the crops better, cleaner, and the time is not too long.Drying process with this drying machine also does not require a large area. Drying cassava made into cassava chips and rengginang takes about 2-3 hours, compared to manual drying done by drying the open yard takes 12-16 hours.The society can make this tool itself in order to increase their income.Keywords: dryer machine, cassava, aluminum copra, solar cell
PENDAMPINGAN PROGRAM ALIH TEKNOLOGI MESIN PEMOTONG SAYURAN UNTUK PENINGKATAN USAHA KUE TRADISIONAL YANG BERKUALITAS Yovan Witanto; Hendra Hendra; Anizar Indriani
DHARMA RAFLESIA Vol 17, No 2 (2019): DESEMBER (ACCREDITED SINTA 5)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v17i2.10071

Abstract

Pematang Gubernur, Muara Bangkahulu District, Bengkulu City, is a town where many people do small business making and selling traditional cakes or fried foods. This business uses vegetables, such as potato, carrot, cabbage   as base ingredients.  However, the people have not yet used technology to help them do the work, especially for the vegetable cutting process. Hence, they lack of time efficiency and consistency in size of the cut food. To overcome this, technology is needed in the form of a multipurpose vegetable cutting machine capable of cutting large capacity vegetables in no time. This community service activity aims to assist technology transfer programs to the community. The team of this program introduces the vegetable cutting machines, as well as providing and motivating ways to create, install and use vegetable cutting machines. Methods used in this program include assisting in the identification of vegetable / grass cutting machine components, design assistance, material selection and manufacturing of cutting machines and practice using cutting machines. The results show that participants are very interested in making and using the equipment. They expect the sustainability of this activity. Participants hope that this activity will be continued with training in making various forms of vegetable cutting mold. Different shapes of cutting is expected to get more attractive look of the food. 
PEMBUATAN ALAT PENGERING BERPUTAR (ROTARY) KOPI DAN LADA HITAM MENGGUNAKAN MIKROKONTROLER ARDUINO UNO DESA AIR RAMAN KABUPATEN KEPAHIANG PROPINSI BENGKULU Anizar Indriani; Yovan Witanto; Hendra Hendra
DHARMA RAFLESIA Vol 17, No 1 (2019): JUNI (ACCREDITED SINTA 5)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v17i1.6197

Abstract

Bengkulu Province has many potentials such as beaches, conservation forests, plantations and others. Plantations in Bengkulu consist of smallholders and private / BUMN businesses. Smallholder plantations include coffee, black pepper, palm, rubber, areca nut and other gardens. The results of this plantation are still traditionally processed, which is drying and drying in the open with the help of solar heat. This drying process is still being implemented where the quality is poorly controlled. This has caused the yield of the plantation in Bengkulu to be unknown to other regions. like coffee in the Bengkulu area which has a distinctive taste characteristic compared to other regions. Coffee that is processed is Robusta or Arabica coffee which is the mainstay of the people of Air Raman Village, Bengkulu Province. The processing process is dried in the yard of the house, field, roadside and others. This drying and processing process is easily polluted from dust, animal waste, uneven drying. And the erratic drying time causes the villagers to need a machine or garden processing technology. One technology is a rotary dryer. Rotary drying machines can be used by utilizing regional potential such as solar energy, wind energy, water energy and others. In addition to Coffee, this village also has garden products such as black pepper, Pinang and others where the process is the same as the coffee harvest. The advantage of this dryer is a shorter drying time, the use of solar energy can minimize operational costs for drying coffee and black pepper. The dried coffee and black pepper are free from animal waste, dust and various other types of garbage and the process of drying more than 4 days from drying is done manually / in the public yard. This is because the temperature inside the drying machine is rotary higher than the open air, the level of dryness of coffee and black pepper is produced evenly, because the temperature in the rotary dryer is equipped with a stirrer evenly spread so that the stirring process is no longer necessary. . The working mechanism of this tool is expected to help people producing coffee and black pepper to dry their crops so that the quality of coffee and black pepper is good and the selling value is high. The output of PPM activities The application of science and technology is a high selling value that will increase people's income, improve people's welfare to be better and also create new jobs for the community as a producer of rotary drying machines. The availability of appropriate technology for the design and construction of rotary drying machines. Scientific publications at the national level are published in the national journal Dharma Raflesia December 2018
PELATIHAN PEMANFAATAN GAS LPG SEBAGAI BAHAN BAKAR ALTERNATIF GENSET UNTUK MASYARAKAT NELAYAN Yovan Witanto; Hendra Hendra; Angky Puspawan
DHARMA RAFLESIA Vol 15, No 1 (2017): JUNI
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/dr.v15i1.4237

Abstract

This community service aimed at improving the knowledge and skills of the fishermen community of Pantai Jakat Bengkulu city in using gas fuel converted from liquid fuel. The community service was conducted in the form of a traning. The activities involved the fishermen in installing the converter kit of a gas fuel; trying out the genset which used the gas fuel; and evaluating the performance of the genset. After the training, the participant were asked to give opinion about the possibility of using the converted gas in their day to day fishing activities. The results of the training showed that the fishermen have a positive responses toward the use of the gas fuel for the genset. However, they still have some worries toward the safety of using the converted gas fuel.  Keywords: Genset, Gas Fuel 
ALIGNMENT POROS POMPA BENFIELD 1107-JB MENGGUNAKAN DIAL INDIKATOR DENGAN METODE RIM AND FACE Afif Chaniago Bastiar; Yovan Witanto; Dedi Suryadi
Teknosia Vol. 17 No. 1 (2023): Juni 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/teknosia.v17i1.28432

Abstract

Alignment is a process that aligns two shaft axes that are not straight to centric (between the driving shaft and the driven shaft axis). Correct alignment is needed so that the clutch run out check is correct, so that parallel misalignment and angular misalignment do not occur which caused the industry to lose billions of dollars. The purpose of this research is to analyze the alignment performance on the Benfield 1107 JB PT pump shaft. PUSRI to create the correct alignment. The method used in this study is a dial indicator with the face and rim method. The measuring instrument used is a Dial Indicator with a detailed accuracy of 0.01 mm with radial and axial measurements. The results show a different final value for each angle used. From the difference in values ​​obtained, namely in the radial direction the angle is 0o which is 0 mm, the 90o angle is 0.07 mm, the 180o angle is 0.14 mm, and the 270o angle is 0.07 mm, and the difference in value in the axial direction is the angle 0o is 0 mm, 90o angle of 0.01 mm, 180o angle of 0.01 mm, and 270o angle of 0 mm indicates that the 1107-JB Benfield Pump is ready to operate again on the P-IV Ammonia section.
PENGARUH AIR FUEL RATIO (AFR) TERHADAP EFISIENSI TURBIN GAS PADA PLTGU UNIT 2 PT. PLN (PERSERO) KERAMASAN PALEMBANG-PROVINSI SUMATERA SELATAN Angky Puspawan; Rifki Sulthan; Agus Suandi; Yovan Witanto
Teknosia Vol. 17 No. 1 (2023): Juni 2023
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/teknosia.v17i1.28754

Abstract

Gas turbine efficiency is an indicator to determine the performance of a generator. The greater the efficiency value of the gas turbine in a generator, the better the performance of the generator. One of the things that affect the value of the efficiency of a gas turbine is the air fuel ratio. Air Fuel Ratio (AFR) is the ratio of the amount of air and fuel in the combustion process in units of mass or volume. Air fuel ratio is a factor that affects the perfection of the combustion process in the combustion chamber. In the graphic image it can be seen that the lowest AFR values ​​are on July 3 and 4 2022, when the gas turbine produces a loading of 20900 kW and 20100 kW with an AFR value of 39.76 unitless each. Whereas the highest AFR value is on June 28 2022 when the gas turbine produces a loading of 20780 kW with an AFR value of 40.68 unitless. The highest gas turbine efficiency value is on June 30, 2022, at a loading of 20,650 kW with a gas turbine efficiency of 83.3%. The lowest efficiency value is on July 2, 2022, at a load of 20,800 kW with a gas turbine efficiency of 81.05%. From the results of existing data processing and graphs, it can be seen that the value of the air fuel ratio and the efficiency of the gas turbine are inversely proportional, which means that when the value of the air fuel ratio decreases, the value of the efficiency of the gas turbine tends to increase. However, there are some deviations when the value of the air fuel ratio decreases, the efficiency of the gas turbine also decreases. Therefore it can be concluded that the value of the air fuel ratio affects the value of the efficiency of the gas turbine, however, the value of the air fuel ratio is not the only factor that affects the value of the efficiency of the gas turbine.
Optimasi Pemanfaatan LPG Sebagai Bahan Bakar Genset Untuk Mendukung Program Penghematan Energi yovan witanto; Benny Dwika Leonanda
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1113

Abstract

The use of LPG as a generator fuel needs to be optimized. For this reason, the correct LPG gas flow rate needs to be studied so that it becomes economical. The purpose of this study is to analyze the effect of fuel flow rate variation and Choke Valve variation on the performance of a 4-stroke generator. Gas enters the carburetor with varying gas flow rates of 3 L/minute, 4 L/minute, 5 L/minute and 6 L/minute. Then the generator is set to run stably on fully open, half and closed Choke Valve variations. From these variations, a combination is then sought to produce the smallest LPG flow rate with optimum power. The generator can operate well at flow rates of 4 L/min and 5 L/min with the Choke Valve variation position fully open. This shows that the ratio of LPG and air reaches the ideal condition so that the combustion process is complete. Optimization of LPG consumption in the generator is set at a flow rate of 4 L/minute with the Choke Valve fully open. Thus the excessive use of LPG can be saved.
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
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