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INDONESIA
Journal of Renewable Energy and Mechanics
Published by Universitas Islam Riau
ISSN : 27146219     EISSN : 26148315     DOI : 10.25299
Core Subject : Social, Engineering,
Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences
REM is a peer-reviewed and open access journal that publishes significant and important research from area of Mechanical and Material Science and Development of Technology related with Mechanical Engineering. We accept submission from all over the world on English language. Our Editorial Board members are prominent and active researchers in renewable energy and mechanical engineering fields who ensure efficient, fair, and constructive peer-review process. All accepted articles will be published freely and available to all readers with worldwide visibility and coverage. REM (Journal of Renewable Energy and Mechanics) published periodically two times annually by Department of Mechanical Engineering, Faculty of Engineering, Universitas Islam Riau.
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Articles 69 Documents
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Effect of Quenching Medium and Tempering Temperature on Microstructure and Hardness of JIS SUP 9 Steel: Pengaruh Media Pendingin dan Temperatur Tempering pada Mikrostruktur dan Kekerasan Baja JIS SUP 9 Andrie Harmaji; Akhmad Ardian Korda; Rama Ramadhan; Satrio Pambudi
Journal of Renewable Energy and Mechanics Vol. 6 No. 01 (2023): REM VOL 6 NO 01 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no01.10973

Abstract

JIS SUP 9 steel is one of the materials commonly used for suspension components in motorized vehicles with medium carbon steel base material. It must have good hardness and toughness so that failure does not occur during operational. This research was conducted to increase the hardness of JIS SUP 9 Steel through a heat treatment and various quenching media. The heat treatment was carried out with 830-880ºC temperature with a holding time of 7 minutes then cooled using water and oil. After treatment, tempering was carried out with a holding time of 7 minutes and then cooled in room temperature. Hardness testing was carried out using Microhardness Vickers and then the microstructure was observed using an Olympus Metallurgical Microscope. The results show that heat treatment followed by rapid cooling increases the initial hardness of JIS SUP 9 (229 VHN) steel. The decrease in hardness after the tempering process will be higher with increasing tempering temperature. The results of the microstructure of the sample without heat treatment showed pearlite and ferrite phases. After heat treatment, tempered martensite, residual austenite and carbide phases appear. It can be concluded that changes in the microstructure affect the hardness of JIS SUP 9 steel.
The Effect of Silica Sand Size on Mechanical Properties, Permeability and Proppant Microstructure Nover Martaheru; Dedikarni; Rieza Zulrian Aldio; Dody Yulianto; Kurnia Hastuti
Journal of Renewable Energy and Mechanics Vol. 6 No. 01 (2023): REM VOL 6 NO 01 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no01.11274

Abstract

Pellet silika merupakan produk teknologi keramik komposit berbahan penguat pasir silika yang diaplikasikan dalam industri minyak dan gas sebagai proppant (pasir frank) maupun sebagai filter air dan industri perminyakan. Penelitian ini bertujuan untuk mendapatkan pengaruh ukuran pasir silika terhadap kekuatan tekan, permeabilitas dan mikrostruktur. Pada penelitian ini, ukuran pasir silika yang dipilih ukuran pasir silika halus yaitu (200 mesh) dan pasir silika kasar yaitu (20 mesh) dan diikat oleh polyethylene glycol (PEG) 400. Hasil uji kekuatan tekan terendah didapat pada sampel I yaitu 33,24 MPa sedangkan kekuatan tekan tertinggi pada sampel III yaitu sebesar 34,05 MPa. Karena semakin banyaknya ukuran butir pellet silika halus mampu memberikan ikatan interfacial pada polyethylene glycol (PEG) 400, dengan ukuran diameter lebih kecil akan memudahkan terjadi ikatan pada matriks sehingga meningkatkan nilai kekuatan tekan. Namun, uji permeabilitas berbanding terbalik pada kekuatan tekan dimana nilai permeabilitas tertinggi didapat pada sampel I yaitu 29,93 mD, sedangkan nilai permeabilitas terendah pada sampel III yaitu sebesar 23,35 mD. Hal ini karena adanya hubungan ukuran pasir silika halus yang berlawanan arah dengan ukuran pasir silika kasar. Artinya, apabila ukuran butir pasir silika halus naik dan ukuran butir silika kasar turun maka nilai permeabilitas turun. Hasil pengamatan mikrostruktur pada sampel I terlihat lebih sedikit rongga atau porosity dan membuat suatu ikatan interfacial yang lebih kuat. Karena adanya ukuran butir pasir silika halus lebih dominan banyak dari pada ukuran butir pasir silika kasar serta dibantu oleh pengikat berupa polyethylene glycol (PEG) 400.
Design & Development of a Screw Conveyor-Based Soybean Washing Machine for Tempeh Production Zoel Fachri; Rouhillah; Muharrir Alwathani
Journal of Renewable Energy and Mechanics Vol. 6 No. 01 (2023): REM VOL 6 NO 01 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no01.12053

Abstract

Soybeans are one of the main ingredients for making tempeh. Most of the tempeh production businesses still use the traditional system of washing soybeans. Washing soybeans is still done manually using a washing drum filled with water and stirred by hand, thus draining the workforce. In the process of washing soybeans, there is still direct contact with parts of the human body, resulting in unhygienic soybeans. From these problems, the solution is to make a machine that can wash soybeans in tempeh production which aims to facilitate washing soybeans and produce clean and hygienic soybeans. The soybean washing machine process uses a screw conveyor system with an AC motor 1 phase 1 HP 1420 Rpm as a driving force and a DC 12 V 25 W water pump to drain water into the watering canal. The machine can wash 5 kg of soybeans for 10 seconds, and produces a motor rotation of 271.2 Rpm, voltage 229 V, current 2.58 A to produce clean and hygienic soybeans.
Experimental Study of The Potential for Energy Absorption and Drying Time of Coffee Beans Using a Dome Dryer Type Dryer in The Sukmailang Area of Pesawaran Regency Yopi Rusdian Santoso; Lathifa Putri Afisna; Muhammad Syaukani; Gita Johannes Saragih
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.10479

Abstract

The traditional drying method has many weaknesses, namely it is very dependent on the weather, so that drying takes a long time. Traditional drying methods result in frequent contamination of dust, dirt, insects, and if wet they are prone to moss growth due to delays in drying during cloudy or rainy weather. This study designed a coffee bean dryer with electric power which is the result of converting solar energy with the help of photovoltaic which is first stored in the battery. The main components of this tool are: drying chamber, drying roof, tray, thermostat, heating element, this test is carried out to determine changes in seed moisture content, required power and efficiency. The temperature is set at 50°C with a fan speed of 3m/s. The fastest decrease in water content occurred in the mass of 1 kg coffee bean samples starting on June 22, 2022 from 28.5% water content to 12% moisture content. Meanwhile, the longest decrease in the water content of coffee beans was at a mass of 2 kg coffee beans on June 24, 2022, the initial water content of coffee beans was 29.3% to 13.2%. The greater the mass of the coffee beans to be dried, the greater the time required to dry the coffee beans using a dome dryer. The maximum power is in the Sukmailang area, Pesawaran district which has a plateau as high as 1200 meters above sea level (MDPL) with an average power of 11.38 Watt. The highest power is produced at 12:00 WIB with a value of 16.49 Watts. The use of solar panels in the Sukmailang area, Pesawaran Regency which has a plateau as high as 1200 (MDPL) is still not effectively utilized because the results obtained have an average efficiency value of 2.22%
Vibration Analysis of Fire Pump of PEM Akamigas Cepu: A Case Study Hernawan Novianto; Sujono
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.11972

Abstract

Fire pump is a pump that is used to move water from the firewater reservoir to the location of the fire. If there is damage to this pump, the fire that occurs cannot be resolved quickly so that the impact of damage caused by fire becomes more widespread. Various problems can occur in the operation of the pump, one of which is damage to the bearings and shaft, noise occurs, decreased capacity, and even a decrease in pump efficiency. So to prevent the risk of greater damage and minimize losses in terms of cost and time, it is necessary to carry out maintenance. One of the efforts to detect damage to the pump is by vibration analysis, where from the vibration characteristics that occur, the type of damage can be determined. The purpose of this study was to determine the vibration characteristics that occur in the PEM Akamigas Cepu fire pump, by monitoring conditional vibrations using a vibration analyzer. The method is to attach the transducer to a predetermined location to determine the vibration spectrum that occurs in the axial, radial and tangential directions, then analyze the type of damage so that appropriate maintenance actions can be taken. As a result, this pump is indicated to be experiencing extreme looseness or bearing clearance problems at the pump drive end and pump non drive end as well as experiencing moderate pump imbalance, so it needs to be repaired immediately to avoid more serious damage.
Analysis The Effect of Solar Radiation on The Efficiency of PV Plant 50 kWp Rooftop UNPAM Viktor Ojak Abdul Rozak; Rohmat Tri Mulyadi; Hafidz Nurfadilah
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.12181

Abstract

The potential for solar energy in indonesia which is a tropical country is very large with an insolation of around 4.5 Kwh/m2/day. Solar energy in the form of radiation waves will affect the power generated by solar panels and the efficiency of solar panels in generating power. This study was conducted at PV plant pamulang university which has a total of 108 panels with 6 strings and 18 panels in each string. The data in this study were taken per string to see the difference of efficiency in each string. The main problem of this study is to find out how much power and efficiency generated by PV plant against solar radiation. The purpose of this study is to understand and analyze the effect of solar radiation on power and efficiency. The method used is a quantitative descriptive method using a seaward irradiance meter to measure the average daily radiation per string and isolarcloud software to retrieve data from the voltage and current per string. The data taken is then calculated using a formula and then described using tables. Study shows that heat from the weather will result in decreased efficiency and the results of the analysis for a day the average value of radiation is 544.19 w/m2, the average power is 4227.79 watt and the resulting average efficiency is 18.57%.
Perbandingan Efisiensi Inhibitor Organik dan Anorganik pada Penurunan Laju Korosi Material Radiator Kurnia Hastuti; Argak Dwi Wandana; Dody Yulianto; Dedikarni; Jhonni Rahman; Irwan Anwar
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.12338

Abstract

Radiator adalah suatu sistem atau komponen yang berfungsi utuk menjaga supaya temperatur mesin dalam kondisi ideal. Inhibitor anorganik telah terbukti dapat menurunkan laju korosi namun memiliki efek negatif karena materialnya yang tidak ramah lingkungan dan bersifat racun. Berdasarkan hal tersebut maka penggunaan inhibitor anorganik perlu dibatasi. Pada penelitian ini akan dibandingkan efisiensi inhibitor organik dan anorganik dalam menurunkan laju korosi. Inhibitor anorganik yang digunakan adalah Natrium Kromat (Na2CrO4) dengan konsentrasi 0,5%, 0,7%, dan 0,9%. Sedangkan inhibitor organik adalah Minyak Biji Kapas dengan variasi konsentrasi yaitu 25%, 30% dan 35% dalam waktu perendaman 21 hari dalam setiap inhibitor. Selanjutnya akan diuji ketahanan korosinya dengan media air biasa. Hasil pengujian laju korosi natrium kromat terendah pada konsentrasi 0,9% dengan nilai 0,0815 mm/y (0,628%) dengan waktu 21 hari. Laju korosi terendah pada konsentrasi 25% dengan nilai 0,1614 mm/y (0,273%). Penelitian ini menunjukan efisiensi perbandingan terbaik masih di lihat pada inhibitor anorganik natrium kromat, setaiap konsentrasi laju korosi semakin rendah.
A Designing Automatization for Integration of Non-Consumable Cooking Oil and Biodiesel Reactor Static Mixer Type Firda Fauziyah; Trapsilo Prihandono
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.12496

Abstract

Sistem deteksi ketidaklayakan minyak otomatis dikembangkan karena urgensinya membantu pengguna mengetahui kapan minyak goreng telah tidak layak untuk digunakan kembali dalam proses memasak dikarenakan faktor kesehatan. Parameter fisik berupa warna dan kekeruhan minyak dengan memanfaatkan sensor warna dan fotodioda dipilih dengan metode klasifikasi yang digunakan berupa komputasi Bayes. Dari penggunaan alat tersebut nantinya, dihasilkan minyak terdeteksi layak dan tidak layak. Minyak bekas yang dihasilkan dari proses memasak atau Used Cooking Oil (UCO) akan diproses menjadi bahan bakar baru yaitu biodiesel. Proses pembuatan biodiesel yang melibatkan reaksi transesterifikasi dilakukan dalam alat yang didalamnya terdapat pengaduk (mixer), dimana alat tersebut dikenal dengan reaktor. Penelitian ini bertujuan merancang integrasi kedua alat tersebut, sistem deteksi ketidaklayakan minyak dan reaktor biodiesel tipe static mixer.
The Analysis Static of Chassis Robot Arm as Design Modification Induction Melting Furnace Machine Using FEA Method Eka Bima Saputra; Ahmad Zohari; Andriansyah; Wahyu Bambang Sulistyo
Journal of Renewable Energy and Mechanics Vol. 6 No. 02 (2023): REM VOL 6 NO 02 2023
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/rem.2023.vol6.no02.14344

Abstract

Induction furnace is a metal melting furnace that uses heater. The high temperatures can cause work accidents if not carefully. The cause of work accidents, especially machines is had mistake when initially machine designed. An alternative solution is to make improvements the machine. The researcher made a robot arm design that functions to transfer melting products and reduce work accidents like being exposed to melted metal. The researcher’s purpose is to analyze the design static of robot arm as modification induction melting furnace machine. The method is to study previous research literature related to static simulation. Researchers use the SolidWork premium 2018 software which consists of stress (von mises), displacement, and FOS (factor of safety) calculations. Based on the static simulation results, it can be concluded that the highest values ​​of simulated stress (von mises) at 5N, 10N, and 15N loads were 13.926Mpa, 27.728Mpa, and 41.531Mpa which categorized as feasible because they were below yield strength value of 64.205Mpa. Simulation displacement, the design experienced the most significant deformation at 15N load with value of 0.337 mm. The FOS (factor of safety) value each loading were 4.610; 2.315; and 1.474 which fulfills the static load safety requirement 1.25.

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