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Agus Nuramal
Mechanical Engineering Universitas Bengkulu, Bengkulu, 38371, Indonesia
Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Nursing Public Health

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DESAIN DAN PEMBUATAN HAND LOADER OUTPUT DENGAN MENGGUNAKAN SOFTWARE SOLIDWORKS Yueprayuga, Abie; Puspawan, Angky; Nuramal, Agus; Hadi Susanto, Tri Nugroho
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.v9i1.39474

Abstract

The design of this output hand loader aims to be a place to receive samples that have passed testing in order to improve ergonomics during the irradiation sampling process by utilizing existing materials (acrylic). The hand loader output testing method is by calculating the travel time for empty capsules and capsules containing five variations of samples when sent from the pneumatic lab to the AAN lab, and followed by testing the functional integrity of the capsules when transferred. The results show that the travel time required for the capsule to reach the hand loader is 2 seconds and the capsule is not damaged, broken or other defects. The conclusions obtained from the design of the output hand loader were the design and use of acrylic material that did not damage the capsules during testing and improved ergonomics during the sampling process compared to the previous sampling site. Apart from that, the problem when making an output hand loader lies in making bolt holes that are not parallel to other parts, which requires making new holes.
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. 
ANALISIS PRODUKSI LISTRIK DI PEMBANGKIT LISTRIK TENAGA MINIHIDRO (PLTM) Arif Rahman Hafiz; Agus Nuramal; Nurul Iman Supardi
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2022): April 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i1.25452

Abstract

Mini-hydro Power Plant (PLTM) is one of the hydroelectric power plants of choice where PLTM utilizes water energy which has a flow capacity that is not too large. The Padang Guci PLTM with a capacity of 3x2 MW is located in the Air Padang Guci River, under the auspices of PT. Sahung Brantas Energi in collaboration with the Kaur district government to improve electrical energy services to the community. The electrical energy produced by the Padang Guci PLTM is highly dependent on the flow capacity of the Padang Guci river. The data collection process is carried out to retrieve data about voltage, current, time, and electricity production generated by the generator. The electricity produced by the generator can be seen in kWh in the control room. Data on electricity production, current, and voltage on the kWh meter are then inputted into the computer in the operator's room. Every half hour the data is recorded in the table, the daily data table will be entered into excel and will be inputted into the monthly data. Total electricity production during July 2021 is 1,444,252 kWh and the average daily electricity production is 46,588.77 kWh. With the highest daily electricity production, which is 77,644 kWh, the main cause of the increase in electricity production is due to rain which causes flooding in the river flow so that the turbine operates optimally, because the flow rate required is sufficient to power the three turbines to a maximum of 2 MW. Then for the lowest electricity production, which is 5,124 kWh, due to trips and less flow rate.
ANALISA KOEFISIEN UJUK KERJA MESIN PENDINGIN (CHILLER) UNIT 1 PADA POWER HOUSE Julianto Sinaga; Yovan Witanto; Agus Nuramal
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 1 (2022): April 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i1.25454

Abstract

Each refrigerant has different characteristic properties which affect the refrigeration effect and the resulting coefficient of performance (COP). A refrigeration machine that works by cooling water is called a refrigeration machine chillers. Chiller is an air conditioner with no cooling system direct. In this indirect cooling system, the refrigeration engine does not instantly cools the air in every room. Refrigeration machine cools water demin first, then this cold demin water is used for cool the air in the room. Cold demin water as cooling medium to reduce the temperature of a wide room at power house (PH) PLTA Musi. The method used in working on this practical work report is:by making observations or observations in the field, conducting interviews (interview) with supervisors and practical work supervisors regarding theoretical data (specification data). In this study, the Cooling Performance Coefficient (COP) was analyzed On Power House (PH) PT PLN (PERSERO) UL PLTA Musi The results of this study get the conclusion, namely: The coefficient of performance (COP) on the machine chiller unit 1 in Power House PLTA Musi by 4.22 is smaller than specification coefficient. This indicates that the cooling system is working properly optimal.
SIMULASI ANALISIS VELOCITY ALIRAN FLUIDA PADA TANGKI REAKTOR NUKLIR MENGGUNAKAN METODE COMPUTATIONAL FLUID DYNAMICS (CFD) Mifta Aroyyani; Agus Nuramal; Hendri Hestiawan
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 6 No. 2 (2022): Oktober 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v6i2.25461

Abstract

Center for Applied Nuclear Science and Technology (Pusat Sains dan Teknologi Nuklir Terapan /PSTNT) is a work unit that is under and directly responsible to the Deputy for Nuclear Science and Applications of Nuclear Technology, National Nuclear Energy Agency. In PSTNT Bandung, the function of the tank is as a container to place the reactor components, the reactor shield for the heat exchanger and as a place for nuclear reactions to take place. In nuclear reactor tank flow distribution ocures in various velocity.The purpose of this practical work is to analyze the velocity of fluid flow in the reactor tank from the inlet flow to the bottom surface of the reactor and from the bottom surface to the top surface of the TRIGA 2000 reactor. The method used in this practical work is the Computational Fluid Dynamics (CFD) Velocity method. CFD is a method for simulating fluid flow. The method is processed numerically and then digitally modeled. In practice, the authors modeled and studied the conceptual design of the reactor system using CFD based on Gambit and Fluent applications in a reactor tank. GAMBIT is an application produced by fluent inc. which is useful for making a model and discrete (meshing) to be analyzed by numerical methods. Fluent is an application that can solve fluid flow cases with the results obtained after discretizing the GAMBIT application. The results by CFD shows the distribution of fluid flow from the inlet pipe to the bottom surface of the reactor tank then the flow rises to the top surface to the outlet pipe. The velocity of the fluid flow from the inlet flow to the bottom surface was getting smaller, and the smallest value was at the bottom of the nuclear reactor, by 0.164 m/s and the flow distribution from the bottom surface to the top surface of the velocity value in a nuclear reactor would be bigger by the largest value being on the top surface of the nuclear reactor is 2.9 m/s.
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. 
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.
Technology Transfer of Compost Briquette Production from Household Organic Waste in Sawah Lebar Baru Sub-District: Alih teknologi pembuatan briket kompos dari limbah organik rumah tangga di kelurahan sawah lebar baru Yovan Witanto; Agus Nuramal; Helmizar
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.v2i1.41604

Abstract

Compost produced by economically non-productive residents in Sawah Lebar Baru Subdistrict has remained underutilised, leading to accumulation and limited economic benefit. This community service activity aimed to introduce Seed Briquette Technology as an innovative solution to enhance the value and usability of household compost. The programme involved knowledge dissemination and hands-on training on how to produce seed briquettes using existing compost. The compost was compacted into Soil Blocks—pressed blocks with a central hole—using a manual moulding tool. This tool was introduced and distributed to local residents during a technology transfer session conducted by the Faculty of Engineering in RT 29. The participants responded with strong interest and demonstrated the ability to apply the technique successfully. Community members were able to convert their compost into functional seed briquettes, showcasing both skill development and successful adoption of the technology. As a result, the participants gained valuable technical skills which are expected to support future income generation. The activity highlights the potential of simple, locally adapted technologies to improve waste management and economic empowerment in urban communities.  
SIMULASI DUDUKAN LOADING-UNLOADING PANSER MORTIR MENGGUNAKAN SOFTWARE SOLIDWORKS Izza, Rohul; Nuramal, Agus; F. Alqap, A. Sofwan
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.v9i2.39682

Abstract

The loading-unloading stand is part of the Panzer mortar loading-unloading tool which functions to hold the mortar and move the mortar from a vertical position to a horizontal position. In this test, the aim was to design a panzer mortar loading-unloading stand using Solidworks software, to find out how to simulate a loading-unloading stand and to determine the strength of the load on the panzer mortar loading-unloading stand. The simulation process on the loading-unloading stand was carried out to determine the von Mises stress, displacement and strain. von Mises stress and strain testing obtained a maximum result of 3,516 MPa and 5,744%  at the end of the shaft, displacement testing obtained a maximum result of 7,726 mm at the center of the shaft. The minimum factor of safety for loading- unloading stands is around 25.5 This occurs due to changes in the shape of the object being applied.
PREVENTIVE MAINTENANCE CLOSED COOLING WATER PUMP TURBINE PADA PLTU PRIAMANAYA ENERGI KEBAN AGUNG LAHAT 2 X 135 MW Satria, Miko; Nuramal, Agus; Mainil, Afdhal Kurniawan; Helmizar
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.v9i2.39688

Abstract

Preventive maintenance is a maintenance and care activity carried out to prevent unexpected damage and to find conditions or circumstances that can cause production facilities to experience damage during the production process. The purpose of the research conducted by the author is to determine the implementation of preventive maintenance on the closed cooling water pump turbine at the Priamanaya Energi Keban Agung Lahat 2 x 135 MW PLTU, this research was conducted using the observation method or going directly to the field. This research resulted in that by carrying out preventive maintenance regularly and effectively on the closed cooling water pump at this PLTU, the company can ensure that they not only maintain smooth and efficient operations, but also reduce the risk of damage that can disrupt production.
Co-Authors A Sofwan FA Aditya Afrizal Afdhal Kurniawan Mainil Alqap, A. Sofwan F Angky Puspawan Anugrah, Dwi Permana Arie Vatresia Arif Rahman Hafiz Dedi Suryadi Dedi Wahyudi Deviya, Aprilman Dody Ariawan Eka Putra, Rama Dani Falah, Sabilul Hadi Susanto, Tri Nugroho Hardiansyah Hardiansyah Hasibuan, Zulfahmi Matumona Helmizar - Hendri Hestiawan Hendri Hestiawan Hendri Hestiawan Hidayatullah, Nasrul Ikhwanusshofa, Muhammad Izza, Rohul Jaya, Efran Riansyah Rahmat Julianto Sinaga Khairul Amri Lesmana, Pandu Mifta Aroyyani Nizam, Ahmad Nopita, Dian Nurul Iman Supardi Pratama, Gilang Giyas Pratama, Samuel Yoga Putra, Rama Dani Eka Rifki Sulthan Rosa, Khairul Amri Rosa, M. Khairul Amri Sandy, Rasidiq Karunia Satria, Miko Sudibyo Sudibyo Yossie Anggraeny M Yovan Witanto Yovan Witanto Yovan Witanto Yueprayuga, Abie zuliantoni, Zulian Zuliantoni, Zuliantoni Zuliantoni1, Zuliantoni