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All Journal Turbo : Jurnal Program Studi Teknik Mesin Jurnal AME (Aplikasi Mekanika dan Energi): Jurnal Ilmiah Teknik Mesin Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin
Agus Nuramal
Mechanical Engineering, University of Bengkulu
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PEMANFAATAN INTERNET OF THINGS UNTUK MONITORING SUHU DI BPPT–MEPPO Ikhwanusshofa, Muhammad; Nuramal, Agus; Supardi, Nurul Iman
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.v4i1.13274

Abstract

Proses monitoring suhu merupakan hal yang sangat penting untuk dilakukan khususnya dalam dunia industri. Dengan monitoring suhu, diperoleh data suhu yang dapat digunakan untuk melakukan quality control dan analisa pemecahan masalah ketika terjadi suatu kegagalan. Pada artikel ini akan diambil data suhu dan kelembaban di ruang workshop BPPT-MEPPO dengan menggunakan module DHT11 yang sebagai sensor suhu dan kelembaban. Sinyal yang diterima oleh DHT11 akan diolah oleh Raspberry Pi 3 dan dikirimkan ke ThingSpeak sebagai server penerima data. Setelah data masuk ke ThingSpeak, data pengukuran yang telah dilakukan dapat dilihat menggunakan handphone ataupun komputer yang mempunyai akses internet. Data yang diperoleh selanjutnya ditampilkan dalam bentuk grafik suhu dan kelembaban vs waktu. Tampilan grafik tersebut dapat diakses secara mobile dengan perangkat telefon yang terhubung dengan akses internet.
PERPINDAHAN PANAS PADA PIPA HEAT EXCHANGER DENGAN PIPA BERBAHAN KACA, TEMBAGA, DAN TEMBAGA YANG DILAPIS RESIN Nuramal, Agus; Puspawan, Angky; Pratama, Gilang Giyas
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.v4i2.18396

Abstract

In this study, a heat exchanger will be designed with the principle of tube-pond, normal water flowing tubes and hot water-filled ponds. This study aims to determine the heat transfer characteristics of glass pipe, copper, and resin coated copper.The materials used in the tube were glass, copper, and resin coated copper, polyester resin of yukalac BTQN 157 and a catalyst of methyl ethyl ketone peroxide. In the test, the water temperature variation in ponds was 70?C, 80?C, and 90?C. At each temperature, the test was carried out by flowing normal water into the tube by varying the discharge by 1lpm, 0.8lpm, 0.6lpm, 0.4lpm, and 0.2lpm. The values for the temperature in and out of the water in the tube are obtained. So that the overall heat transfer coefficient value and its effectiveness can be calculated.The results showed that the higher the discharge, the overall heat transfer coefficient on the tube increased. where the highest value is in the copper tube meterial at 1 lpm discharge, which is at 80?C pond temperature of 1544.163 W / m2?C. While the smallest value of the overall heat transfer coefficient is the glassmaterial at the time of discharge 0.2 lpm, which is at a temperature of 90?C of 199.5889 W / m2?C
PROSES PENGEBORAN LUBANG BUCKET EXCAVATOR MENGGUNAKAN MESIN LINE BORING DI PD. XYZ Hasibuan, Zulfahmi Matumona; Nuramal, Agus; Hestiawan, Hendri
Rekayasa Mekanika: Jurnal Ilmiah Teknik Mesin Vol. 5 No. 1 (2021): April 2021
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33369/rekayasamekanika.v5i1.20152

Abstract

PD. XYZ that is located in Soeprapto Dalam, Bumi Ayu, Selebar District,  Bengkulu is engaged in the metal working, construction and workshop. To facilitate the process, a machine is needed to help speed up each process. Tools  machine are used to make human work easy. Drilling process is one of the machining process that the aim is to enlarge the diameter of the excavator bucket hole. The purpose of this study are determine drilling process of a bucket excavator and observe the result of drilling on a line drilling machine. The research used a drilling line TPX6113 type that the chisel is YG6. Drilling process is carried out with three feeding process, namely 4mm, 2mm and 2 mm that the feeding speeds are 20 rpm and 31.5 rpm. The result is the smoothest process drilling in the high speed
Flow Characteristics of Pumps in Series and Parallel Lesmana, Pandu; Nuramal, Agus; Suryadi, Dedi
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.v5i2.20173

Abstract

Pump is a device used to move fluid. The pump moved the fluid from a lower pressure place to a place with higher pressure. If the head or pump capacity needed cannot be achieved using only one pump, it can use two pumps or even more which can be arranged either in series or in parallel. The research objective for pumps arranged in series and in parallel is to determine the characteristics of the circuit of two pumps each of which has different characteristics. In this study, data retrieval is done by measuring the pressure on suction and discharge using pressure gauge at pumps 1 and 2. Whereas to measure the flow rate of a pump arranged in series and parallel using a flowmeter installed on the discharge side of the circuit. This research was done by varied the valve openings on the pump discharge side 2 namely. 2x1800, 4x1800, 6x1800, 8x1800 and full openings. From the results of tested the characteristics of the pump used water fluid on the series arrangement, the highest head value at valve opening 2 x 1800 is 30.99 m at discharge 0 LPM and the lowest head at valve opening 10 x 1800 (full) is 23.99 m at discharge 0 LPM. In parallel circuits, the highest head obtained is 16.99 m with 0 LPM discharge at 8 x 1800 valve openings and lowest head 14.99 at 0 LPM discharge occurs at full valve openings.
PENGARUH TEKANAN VACUUM CONDENSER TERHADAP KINERJA STEAM TURBINE GENERATOR Hidayatullah, Nasrul; Wahyudi, Dedi; Nuramal, Agus
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.v7i1.30100

Abstract

Condenser is an main equipment on power steam electricity system generator. Condenser is an head exchanger that functions as a phase changer from the steam turbine output into water, which is where water results condensation the will pumped to HRSG for used back. Vacuum condenser working for speed up the condensation process in the condenser. PT. PLN (Persero) UPDK keramasan is generator electricity consists of 2 units from gas and steam power plant with power by gas turbine generator of ± 27 MW and a steam turbine generator of ± 13 MW so that the total each unit is 40 MW. This research to determine of effect vaccum condenser pressure of condenser with power turbine, and efficiency thermal. calculation obtained at a vacuum condenser pressure of 15,41 kPa at a turbine power was 9681 kW, and obtain efficiency thermal was 20,39%. On pressure vacuum condenser 15,09 kPa at a turbine power was 9602 kW, and obtain efficiency thermal was 20,24%.
ANALISA NILAI KALOR BAHAN BAKAR BOILLER FIBER DAN CANGKANG Nopita, Dian; Nuramal, Agus; Supardi, Nurul Iman
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.v8i1.36547

Abstract

Fiber and shell are widely use solid fuels in steam boilers. These fuels are waste products generated from palm oil processing. The purpose of this study is to analyze the heating value of fiber and shell. This study used 12 fuel samples, consisting of 3 pure fiber samples, 3 pure shell samples, 3 mixed samples with a composition of 90% fiber and 10% shell, and 3 mixed samples with a composition of 80% fiber and 20% shell, to analyze the calorific value. The weight of each sample is 1 gram. Calorific value is used to determine the high calorific value. The use of different samples produces different heating values, resulting in different high heating values. These different high heating values are then used to determine the low heating value, resulting in different low heating values. In this study, each boiler fuel has a different Low Heating Value (LHV). The highest low heating value is owned by pure fiber fuel with a value of NA (Not Available). While the smallest low heating value of boiler fuel is owned by a mixed type consisting of 90% fiber and 10% shell with a value of 179358,51 Kj/Kg.
PERFORMA POMPA SEKUNDER PADA SISTEM PENDINGIN REAKTOR NUKLIR Anugrah, Dwi Permana; Nuramal, Agus; Puspawan, Angky; Falah, Sabilul
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.v8i2.39461

Abstract

Secondary pump in the reactor nuclear works move fluid in the reactor with take hot from system primary coolant and discard it to environment. For support safety reactor nuclear this need done study to performance pumps secondary being one​​ system cooler reactor. Methodology study consists from studies literature, observation field, and data collection. Pump used as pump secondary to the system cooler Reactor nuclear This is centrifugal water pump with rate Genre volumetric 4500 liters/ minute with capacity adjustable water flow with characteristics heat exchanger. From the results calculation of data taken on three different day​show mark increased efficiency due to rising mark WP. This matter proves that mark WP on pump system cooler secondary reactor nuclear influence mark efficiency from pump secondary used.​ For mark efficiency highest there at 11:00 with​mark amounting to 18.288%.
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. 
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 Angky Puspawan Anugrah, Dwi Permana Dedi Suryadi Dedi Wahyudi Falah, Sabilul Hadi Susanto, Tri Nugroho Hasibuan, Zulfahmi Matumona Helmizar Hendri Hestiawan Hidayatullah, Nasrul Ikhwanusshofa, Muhammad Lesmana, Pandu Nopita, Dian Nurul Iman Supardi Pratama, Gilang Giyas Pratama, Samuel Yoga Rosa, Khairul Amri Rosa, M. Khairul Amri Yovan Witanto Yueprayuga, Abie