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All Journal PISTON (Jurnal Ilmiah Teknik Mesin Fakultas Teknik UISU) Sinkron : Jurnal dan Penelitian Teknik Informatika JOURNAL OF MECHANICAL ENGINEERING, MANUFACTURES, MATERIALS AND ENERGY JURNAL PENDIDIKAN TAMBUSAI Indonesian Journal of Electrical Engineering and Computer Science Jurnal Tunas Jurnal MESIL (Mesin Elektro Sipil) JiTEKH (Jurnal Ilmiah Teknologi Harapan) Jurnal SImetri Rekayasa Journal of Renewable Energy, Electrical, and Computer Engineering Sinergi Polmed : Jurnal Ilmiah Teknik Mesin Jurnal Pengabdian Masyarakat Gemilang (JPMG) Prioritas : Jurnal Pengabdian Kepada Masyarakat Madani: Multidisciplinary Scientific Journal Prosiding Seminar Nasional Teknik UISU (SEMNASTEK) Journal of Multidisciplinary Research and Innovation (JMRI) Buletin Utama Teknik
JUNAIDI
Universitas Harapan Medan
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Physics Public Health Social Sciences Other

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Analisis Pengaruh Panas dan Beban terhadap Kerusakan Traveling Grate pada Boiler Di PLTU Tembilahan 2x7 MW Sandi Saputra; Siswo Pranoto; Yopan Rahmad Aldori; Syurkarni Ali; Junaidi; Andri Herlambang; Muhammad Yusuf Rahmansyah Siahaan; Muhammad Idris
JOURNAL OF MECHANICAL ENGINEERING MANUFACTURES MATERIALS AND ENERGY Vol. 7 No. 2 (2023): Edisi Desember 2023
Publisher : Universitas Medan Area

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31289/jmemme.v7i2.6094

Abstract

Rack grate is a component composed of rack clip and rack bone arrangement that serves as a dropping cross-section media of coal and as a media of coal burned in the boiler.  As part of the main component, the rack grate can be regarded as one of the components that ensure the success of combustion in the boiler. Failure to this component will certainly interfere with the implementation of boiler operations. In addition to require the boiler to be shut down while repaired, in addition to requiring the boiler to be extinguished during repairs, the inoperability of the boiler makes the steam production process at the PLTU impossible and ultimately the electricity generation process cannot be carried out as usual. Damage to the rack grate component has a type of plastic deformation with variable loads and fluctuating heat, which means that the thermal stress in the system has reached the yield stress point. To find out the root cause of this component damage quickly and accurately, an analysis of the results of the implementation of engineering software in this case Ansys Workbench, and a comparison of actual operating data, and data design is the best choice. Lastly, by evaluating the optimum values of temperature, equivalent stress and strain, total deformation, input process parameters value can be controlled to the desired values, resulting in less stress concentration occurs, so that the damage to the workpiece can be reduced or even eliminated.
DESAIN DATA AKUISISI BOMB KALORI METER BAHAN BAKAR CAIR Junaidi Junaidi; Fadly Ahmad Kurniawan Nasution
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

Bomb calorimeter is related to the measurement of the amount of energy of a material. Energy quantities include thermodynamic properties of systems such as enthalpy, internal energy, specific heat or heating value. Designing tools, data acquisition atmega 328p Performing acquisition data testing on bomb calorimeters, Confirming test data on sugarcane bio-ethanol fuel and pertalite sensors used are max6675 with type K thermocouple readings, 5 volt sensor operating voltage with a temperature reading range of 0.25 degrees at speed of 1 millisecond, data from the sensor is transferred to the micro control with the arduino program, the reading received by the micro control is the voltage. This value is converted into numbers with the help of the C++ program and stored in the ms.excel database with PLX DAQ. In this test, the LHV value for pertalite fuel is higher than bio ethanol. A bomb calorimeter device was developed which consists of a micro controller that functions as a measurement tool. The results of the implementation of the micro controller device on the bomb calorimeter can be said to be effective for use in testing fuel ratios. This effectiveness is seen from the test results. In this test, the HNY value on pertalite is higher than the sugarcane bio-ethanol fuel.
KEKERASAN MATERIAL BAJA KARBON RENDAH DENGAN METODE ROCKWELL Junaidi Junaidi; Din Aswan Ritonga
Jurnal Simetri Rekayasa Vol 1 No 2 (2019): Edisi November
Publisher : Universitas Harapan Medan

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Abstract

The development of technology is now so fast over time to help facilitate activities. The world of machinery has a very important role in the development of technology that exists today, on the one hand as a producer of new existing technology and the other hand as a consumer who needs technology in the production process.This research continues to be carried out to produce new technology with the aim of improving human welfare and making it easier for humans to do something. One way to determine the strength or toughness of a material and as a support for the specifications of a material is to use an impact test. Heat Treatment is one of the processes that play a role in the Manufacturing Industry with the aim of Mantenance Process and Production Process.Therefore in this study will be carried out a hardness test analysis of Low Carbon steel material with the Rockwell Method.
Analisa Uji Kekerasan Akibat Perlakuan Panas Dengan Media Pendingin Dexlite dan Air Pada Baja VCN-150 dan Baja S45C Menggunakan Metode Vickers Junaidi Junaidi; Ade Irwan
Jurnal Simetri Rekayasa Vol 2 No 2 (2020): Edisi Oktober 2020
Publisher : Universitas Harapan Medan

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Abstract

Solar Dexlite for diesel-engined vehicles is able to protect the vehicle's engine properly. Dexlite also has Ecosave Technology which is able to protect the engine from rust so that the engine is better protected and becomes durable and long lasting. VCN 150 steel which is equivalent to AISI AISI 4340 is a type of steel material that is widely used for shafts in conveyor motor rolls. This steel is included in the machinery steel group which is also an alloy steel of Nickel, Chrom and Molybdenum with medium carbon content. This material has good toughness and ductility and has the ability to be hardened so that it is suitable for its designation under the desired operational conditions. However, to increase wear resistance, one way to do this is to increase the hardness of VCN 150. There is a correlation that increasing hardness will increase the wear resistance of a material. One of the efforts made is to carry out a hardening heat treatment process to obtain a martensite structure. The results of the hardness test on S45C carbon steel, the sample raw material is 213 HV, at a cooling rate of quenching is 674 HV, normalizing is 208 HV and annealing is 150 HV. The hardness of steel using the quenching process is higher compared to other cooling rates. Heat treatment of steel samples at a temperature of 850 oC for 30 minutes with different cooling rates gives the effect of changing the microstructure of the steel. The results of microstructure observations before being given heat treatment produced ferrite and pearlite grains and after being subjected to heat treatment with the quenching process produced martensite and cementite grains.
OPTIMASI KINERJA TURBIN PELTON RESPON KEMIRINGAN BUCKET Din Aswan Ritonga; Junaidi Junaidi; Rizky Gunawan
Jurnal Simetri Rekayasa Vol 2 No 2 (2020): Edisi Oktober 2020
Publisher : Universitas Harapan Medan

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Abstract

Water is a source of energy that can be used as a power plant by utilizing its potential power. Hydroelectric power plant (PLTA) is a technology that has been proven to be environmentally friendly and does not damage the environment. The use of the turbine depends on the potential head it has. As in this case the Pelton turbine which uses the impulse principle requires a fairly high head. This type of turbine works by utilizing falling water or head, flow velocity, blade angle, number of nozzles, flow size and number of blades. Pelton turbine testing with several combinations of parameters including: nozzle diameter, number of nozzles, number of blades, and blade slope. Optimization analysis using Statistical Software. Based on tests or research conducted on Pelton turbines by varying the bucket slope, number of buckets, diameter of nozzles and number of nozzles using the Taguchi method, it can be concluded that the efficiency of the turbine using 2 nozzles that have been managed for maximum turbine efficiency is produced with a power of 460 watts with efficiency of 28%, found at a bucket slope of 80 at a nozzle diameter of 19 mm. While the maximum turbine efficiency is generated with a power of 220 watts at a bucket slope of -80 with a turbine efficiency of 6% at a nozzle diameter of 25 mm. The maximum output power of the Pelton turbine is by testing using 2 nozzles with a water flow of 375 l/minute at a head of 8 m with a power of 490.5 watts. Based on the results of the Pelton Turbine Test Graph using the Taguchi method, the response of the bucket slope with the Maximum Rotation Nozzle Diameter is at -80 Bucket Inclination Producing a Turbine Rotation of 416.7 Rpm with a Nozzle Diameter of 19 mm. Meanwhile, with a maximum power of 80 bucket slope, it produces a turbine load of 405 watts with a diameter of 22 mm.
STUDI KUALITAS PERMUKAAN PEMBUBUTAN KERING PADA BAJA AISI 4340 MENGGUNAKAN PAHAT PVD DAN CVD BERLAPIS Junaidi Junaidi; Yulfitra Yulfitra
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

In order to manufacture a component of high quality, surface quality is the most important requirement for users. An understanding of the chip removal process in metal cutting is essential for material selection and tool design, and also for ensuring consistent dimensional accuracy and surface integrity of the finished product. Friction in metal cutting affects cutting power, machining quality, tool life and production costs. The most important measure of surface quality during the machining process is the average surface roughness (Ra). When the tool wear reaches a certain value, the cutting force, vibration and cutting temperature increase, causing the dimensional error to be larger than the tolerance and the surface integrity to deteriorate. This tool wear is one of the most important aspects of hard turning. Usually abrasion, adhesion and diffusion are considered the main tool wear mechanisms in hard machining. However, the individual effect of each mechanism depends on the tool geometry, tool grade or class, cutting parameters, and workpiece hardness. Tool wear increases linearly with increasing cutting parameters. This indicates that the increased tool wear at higher cutting conditions may be due to abrasion especially at the rake and flank during machining. The selection of dry machining is carried out with environmental efforts to minimize or eliminate the use of cutting fluid waste.
PEMBUATAN KAMPAS KOPLING MENGGUNAKAN SERAT SERABUT KELAPA Junaidi Junaidi; Fadly Ahmad Kurniawan Nasution
Jurnal Simetri Rekayasa Vol 3 No 2 (2021): Edisi Oktober 2021
Publisher : Universitas Harapan Medan

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Abstract

In this study, the authors tried to develop clutch lining products made from non-asbestos, because the raw material for coconut fiber in Indonesia is very abundant. Indonesian coconut production averages 15.5 billion eggs/year or equivalent to 3.02 million tonnes of copra, 3.75 million tonnes of water, 0.75 million tonnes of shell charcoal, 1.8 million tonnes of coir fiber and 3.3 million tonnes of methamphetamine dust. Knowing the wear rate of clutch linings using coconut fiber. Knowing the comparison of the quality of clutch linings made from asbestos with clutch linings made from coconut fiber and a mixture of fiberglass fibers. for the type of coupling pads specimen 1 has superior quality compared to standard commercial clutch pads, of the 2 types of clutch pads mixed from coconut fiber, specimen 1 is superior to specimen 2 this is because the friction temperature that occurs is lower compared to commercial clutch pads and clutch pads specimen 2. Clutch lining made of asbestos has a max Temperature value of: 415°C Total final thickness: 3mm Total final weight: 9g, Clutch lining made of coconut fiber fiber (specimen 1) has a max Temperature value of: 331°C Total final thickness: 4, 7mm Total final weight: 10g, Coupling lining made from coconut fiber (specimen 2) has a max. Temprature value: 372°C Total final thickness: 4.1mm Total final weight: 15g
ANALISA PENGUJIAN KEKERASAN MATERIAL BAJA KARBONRENDAH DAN BESI MENGGUNAKAN METODE UJI BRINNEL Junaidi Junaidi; Ade Irawan
JITEKH Vol 7 No 2 (2019): September 2019
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v7i2.725

Abstract

Steel is iron with a carbon content of less than 2%. Steel can be formed into various shapes according to needs. Broadly speaking there are 2 types of steel, namely carbon steel and alloy steel. Carbon steel is divided into low carbon steel, medium carbon steel and high carbon steel. The classification of steel is significantly influenced by composition, structure and use. ST 37 iron is classified as low carbon steel, which has less carbon content according to specifications of 0.16%. This steel is also often used for machine constructions that rub against each other such as gears, shafts. Steel has mechanical properties, one of which is hardness. To determine the hardness value, the brinnel test method, the Vickers method and the Rockwell method are used. In this study, the brinnel method will be used, where the materials to be tested are low carbon steel and iron. This test can see the material hardness value of low carbon steel and iron so that it can be applied according to its function.
ANALISA EMISI GAS BUANG KENDERAAN RINGAN YANG DIUJI DI DINAS PERHUBUNGAN KOTA MEDAN Junaidi Junaidi; Din Aswan Amran Ritonga; Maulana Siddiq Sitepu
JITEKH Vol 7 No 2 (2019): September 2019
Publisher : Universitas Harapan Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35447/jitekh.v7i2.731

Abstract

The use of biodiesel in boilers has great benefits because it can reduce exhaust emissions. The purpose of this study is to test the quality of diesel and biodiesel raw materials as fuel from boilers, analyze the concentration of polluting gases (NOx, CO2, SO2) from the combustion of biodiesel and diesel oil experimentally. The combustion system in boilers tends to be simpler than compression ignition as done in diesel engines. This research was conducted experimentally on a fire tube boiler, with a heat input rate of 60,000 kCal / hour and a pressure of 3 bar using biodiesel made from CPO (crude palm oil) as fuel. The mixture varies on 0, 5, 10, 15, 20 and 25% biodiesel in a mixture with biodiesel (B0, B5, B10, B15, B20 and B25). This research was conducted experimentally by testing exhaust gas emissions produced from exhaust gas chimneys which are expected to produce low exhaust emissions and are environmentally friendly. The results showed that the use of biodiesel reduces gas emissions by increasing the value of biodiesel in the mixture. The results showed that the lowest exhaust gas emission was around 4.142% (NOx); 12.50% (SO2) and 7.9% (CO2) are contained in a mixture of 25% biodiesel in fuel (B25).
PENGARUH PENGELASAN SMAW TERHADAP KEKUATAN TARIK PADA BAJA TULANGAN BETON POLOS (BJTP) 24 M. Ichsan; Fadli Ahmad Kurniawan Nasution; Ade Irwan; Junaidi Junaidi
Buletin Utama Teknik Vol 18, No 3 (2023): Edisi Mei
Publisher : Universitas Islam Sumatera Utara

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Abstract

Penelitian ini bertujuan untuk mengetahui apakah ada pengaruh arus pengelasan terhadap kualitas kekuatan tarik baja tulangan BjTP24 hasil pengelasan SMAW dan apakah ada pengaruh arus pengelasan terhadap kekuatan tarik daerah las baja tulangan BjTP24 hasil pengelasan SMAW  . Penelitian ini menggunakan bahan baja tulangan polos yang diberi perlakuan pengelasan dengan variasi arus 80 Amper, 90 Amper dan 100 Amper dengan menggunakan las SMAW DC polaritas terbalik dengan elektroda E7018 diameter 3,2 mm. DC polaritas terbalik yaitu pemegang elektroda dihubungkan dengan kutub positif dan logam induk dihubungkan dengan kutub negatif. Jenis kampuh yang digunakan adalah kampuh V dengan sudut 45 ­­-60  dan selanjutnya spesimen di uji tarik. Rata-rata kekuatan tarik untuk kelompok arus 80 Ampere adalah 523,69 N/mm2 sedangkan untuk kelompok arus 90 Ampere diperoleh 558,18 N/mm2. Dapat dilihat bahwa terjadi peningkatan kekuatan sebesar 34,49 N/mm2. Akan tetapi kekuatan tarik untuk kelompok arus 100 Ampere diperoleh 531,08 N/mm2, dalam hal ini mengalami penurunan kekuatan sebesar 27,10 N/mm2 dari kelompok arus 90 Ampere, namun nilai tersebut masih berada di atas kekuatan tarik kelompok arus 80 A dengan peningkatan sebesar 7,39 N/mm2. Nilai kekuatan tarik untuk masing-masing kelompok, Nilai regangan tertinggi diperoleh kelompok arus 90 ampere dengan nilai 7,71%, sedangkan untuk kelompok arus 80 ampere dan 100 ampere mengalami penurunan dengan nilai masing-masing 1,04% dan 3,07%.
Co-Authors Abd Rahman Mustharaynal Akhyar Ade Irawan Ade Irwan Ade Irwan Adrian, Jefri Ahmad Yanie Ahmad Yanie Ananda, Yussa Andre Waskito Andri Herlambang Anggri Abdirullah B Pradana Barus, Brema Sanjaya Catra Indra Cahyadi Dani, Agus Ramah Denni, Denni Din Aswan A. Ritonga Din Aswan A. Ritonga Din Aswan Amran Ritonga Din Aswan Ritonga Dwivan Asri E Eddy Eddy Koto F A Kurniawan F A Kurniawan F h dongoran Fadli Ahmad Kurniawan Nasution Fadly A Kurniawan Fadly A. Kurniawan Fadly A. Kurniawan Nasution Fadly A. Kurniawan Nasution Fadly A.Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Fadly Ahmad Kurniawan Nasution Fadly Ahmad Kurniawan Nst Fadly Kurniawan Fadly Kurniawan Fitriana, Liza Gustama Putra Alhadi Harahap, Muhammad Ali Akbar Harun Harun Herdika Sahputra Hutabarat, Michael A G I Arif Ibrahim, Husin Indra Gusandi Panjaitan Indra Roza Irwa, Ade Jimmi Lauren Siahaan Joko Prasetyo Kurniawan, Fadly A. Kurniawan, Fadly Ahmad Liza, Risko M F Harahap M. Ichsan M. Imam Gunadi M. Irwanto M. Rinoza Marja, R I Maulana Siddiq Sitepu Metro Martogi Manullang Mhd. Rusydi Zain Muhammad Arifin Muhammad Bayu Prakoso Muhammad Idris Muhammad Iman Muhammad Putra Rizky Muhammad Rizky Barus Muhammad Salim Siregar Muhammad Yusuf Rahmansyah Siahaan N Syahputra Nasution, F A K Nasution, Fadli Ahmad Kurniawan Ndruru, Bernadet Deriman Hati Nst, Agus Almi Pandia, Ardian Victori Piktor Abadi Hutagaol Pradipta, Aditya Agung Pratama, Adam Pratama, Lodri R S Manullang Rambe, Supriadi Anwar Randy, Said Muhammad Richardo Chonfu M. Sinaga Riky Triswandi Ritonga, Din Aswan A Ritonga, Din Aswan Amran Rizky Auditya Putra Rizky Gunawan Sandi Saputra Sarjana Sarjana SAWITRI, DARA Sembiring, Oscar Fredriek Siahaan, Fadhil Ali Siddiq, Daffa Maulana Siregar, Lisa Adriana Siswo Pranoto Sofwan Lubis Syurkarni Ali Veri Akhmal Ramadhan Syah W Setiawan Weriono Y, Yulfitra Yanie, Ahmad Yoga Pratama Yogie Saputra Yopan Rahmad Aldori Yudi Andri Mulis Yulfitra Yulfitra, Yulfitra