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jes
Published by Yayasan Kawanad
ISSN : 28288106     EISSN : 2828805X     DOI : https://doi.org/10.56347/jes
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering
The Journal of Engineering Science is not limited to a specific aspect of science and engineering but is instead devoted to a wide range of subfields in the engineering sciences. While it encourages a broad spectrum of contribution in the engineering sciences, its core interest lies in issues concerning material modeling and response. Articles of interdisciplinary nature are particularly welcome. All published article URLs will have a digital object identifier (DOI).
Arjuna Subject : Teknik (semua kategori) - Teknik Kontrol dan Sistem
Articles 75 Documents
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Valuation of Remaining Service Life of H-Beam Steel Structure in the Floating Cafe Bridge at PT. Medco E&P Malaka Alfarezy, Rafie Maulana
Journal of Engineering and Science Vol. 3 No. 2 (2024): July-December 2024
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v3i2.261

Abstract

Bridges are critical infrastructure requiring optimal structural resilience to ensure safety and operational sustainability. A major threat to steel bridge structures is corrosion, which reduces material thickness and may lead to structural failure if unaddressed. This study evaluates the remaining service life (Remaining Life Assessment, RLA) of the H-Beam steel structure in the Floating Cafe Bridge at PT Medco E&P Malaka by measuring corrosion rates using the Ultrasonic Thickness Gauge (UTG) method. Data were collected from 40 measurement points on the Top Flange, Bottom Flange, and Web Flange of the H-Beam. Analysis revealed that the Top Flange in the right zone exhibited the highest corrosion rate (0.66 mm/year), resulting in a remaining service life of only 9 years. In contrast, the Bottom Flange in the middle zone showed the lowest corrosion rate (0.06 mm/year), with a remaining service life of 205 years. The primary factor accelerating corrosion is the dry-wet cycle caused by humidity, rainfall, and solar drying. The right zone experienced higher corrosion rates due to elevated humidity and poor ventilation. To extend the bridge’s service life, mitigation strategies such as reapplying anti-corrosion coatings, conducting regular Non-Destructive Testing (NDT) inspections, cleaning salt deposits, and improving drainage systems are recommended. These measures will enhance structural reliability and minimize corrosion-related risks.
Deflection Measurement System in Flexible Bars Using Eulerian Video Magnification (EVM) Method Rayyan, Muhammad
Journal of Engineering and Science Vol. 3 No. 2 (2024): July-December 2024
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v3i2.265

Abstract

Deflection testing plays a pivotal role in assessing a material’s elasticity, which directly influences the safety and operational reliability of engineering structures. This study develops and evaluates a deflection measurement system employing a flexible bar test apparatus, integrating the Eulerian Video Magnification (EVM) technique. EVM enhances imperceptible displacements and motion changes in recorded video, enabling precise deflection observation. Experimental results indicate that EVM-based measurements recorded a peak deflection of 4.6693 mm and a minimum of −4.78208 mm, while accelerometer measurements yielded a peak of 3.7646 mm and a minimum of −3.7685 mm at 3,600 RPM. The results confirm that deflection magnitude increases proportionally with motor speed, aligning with prior research findings. These outcomes demonstrate the viability of EVM as a non-contact, effective method for detecting small-scale motion variations in materials that are difficult to monitor using conventional approaches. The proposed system improves the accuracy and efficiency of deflection measurements, offering significant implications for structural design and engineering analysis.
Heat Transfer Analysis of the Evaporator in Boiler Unit 2, Nagan Raya Steam Power Plant Ramadhan, Sultan
Journal of Engineering and Science Vol. 3 No. 2 (2024): July-December 2024
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v3i2.266

Abstract

In Indonesia, most power generation facilities employ steam-based systems, including PT PLN Nusantara Power UPK Nagan Raya. To ensure continuous operation, steam power plants must function without operational disruptions, as unplanned shutdowns not only compromise electricity supply but also shorten the service life of associated components. The evaporator, a heat exchanger in the steam boiler, facilitates the phase transition of feedwater from liquid to steam. This research evaluates heat transfer in the evaporator, specifically quantifying the heat transfer rate and assessing the proportion of heat absorbed relative to the thermal energy produced from coal combustion. Measurements were taken under three loading conditions: minimum, medium, and maximum. The maximum heat transfer rate, 184.841 kW, was observed under maximum load, while the lowest, 100.779 kW, occurred under minimum load. Similarly, the highest absorption ratio, 55.49%, was achieved under maximum load, and the lowest, 53.15%, under minimum load. The findings indicate that increased load conditions correspond to higher heat transfer demands, highlighting the influence of loading on both evaporator performance and fuel utilization efficiency.
Sistem Analisis Desain Pembangkit Listrik Tenaga Surya Kapasitas 50 WP Nasution, Elvy Sahnur; Suriadi; Azhar
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.1

Abstract

The need for electricity is good for the industry, offices, and public and individuals are greatly increased. However, the increase in demand for electricity is not accompanied by the additional power supply. Based on these problems, chosen solar energy as an alternative energy to generate electric power. A tool that is used here is the solar cell because it can directly convert solar radiation into electrical energy (photovoltaic process). So that solar energy can be used at night, then during the day, the electrical energy generated is stored before a battery which is controlled by the regulator. Regulator output is directly connected to the inverter from the DC to AC. The test results of solar modules (photovoltaic) indicated that the results of the average power output reached 38.24 Watt, and the currents were 2.49 A.  This is because the photovoltaic follows the direction of movement of the sun and always located at the photovoltaic to remain facing the sun. Therefore, it will still be able to capture the radiant sun to the fullest.
Limbah Tempurung Kelapa diuji Guna Menjadi Bahan Bakar Alternatif Arhami; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.2

Abstract

Pyrolysis is a thermo-chemical which decomposition of organic material through heating process with absent or little oxygen (anaerobic). The purposes of study are design pyrolyzer of coconut shell being to alternative fuels, knowing much of oil from pyrolysis process with method of counter flow and parallel flow, and knowing heat energy or caloric energy which was produced from pyrolysis process with method of counter flow and parallel flow in condenser. The research with through experiments the pyrolyzer which includes reactor, distribution pipe, and condenser. Research methods are the experiment of pyrolysis process at temperature 35oC during 60 minutes with condensation method, counter flow and parallel flow. Results of experiments are data of gas fuels mass obtained 42 grams which used pyrolysis process of coconut shell in the amount of 1000 gr, until produces pyrolysis oil as 198 grams (counter flow) and 196 grams (parallel flow). Counter flow method can absorb a heat as 1304,762 kJ and heat loss through gasses as 462,842 kJ, even though parallel flow no more than absorb as 1200,83 kJ and heat loss through gasses as 545,271 kJ.
Bahan Bakar Minyak Dari Berbagai Metode Konversi Sampah Plastik Ibrahim, Masri; Machmud, M. Nizar; Ali, Masri
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.3

Abstract

The use of plastic and goods made of plastic have been rising in day to day. Increasing use of plastics is a consequence of the development of technology, industry and population. On one hand, the invention of plastic has a remarkable positive impact, because it has many advantages compared to other materials. But on the other hand, the plastic waste has negative impact that too worried, so its solutions need to be looked for. One of the alternative handling of plastic waste that currently extensively researched and developed is converting plastic waste into fuel. Converting plastic waste into fuel oil can be done with cracking process. There are three kinds of process that is hydro cracking, thermal cracking and catalytic cracking. Fuel oil produced from the cracking of plastic waste depending on the plastic type, cracking process used, catalyst type, pyrolisis temperature and condenser temperature.
Kegagalan Permukaan Kontak Rail dan Wheel pada Overhead Travelling Crane Azhar; Ajinar; Zainuddin
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.4

Abstract

For the sake of the smooth process of cement production, it is necessary to maintain each component of the production. One of the tools that play an important role in the maintenance and production of cement is the Overhead Traveling Crane, which is a combination of a separate lifting mechanism with a frame to lift and move loads that can be hung freely or attached to the crane itself. The problems that arise in the Overhead Traveling Crane include the reverse direction of the motor rotation due to an error in the motor connection, the motor cannot start due to a disconnected power supply, the occurrence of bending (curving) on ​​the girder due to lifting operations that exceed the maximum capacity which can also accelerate service life. of the girder, wear on the wheel due to high workload during operation. Due to the need for very long use, periodic maintenance is needed so that it can be in normal condition for a long time. The main parts that support the overall weight of the crane are rails and wheels. This journal discusses the analysis of failures that occur due to contact between rails and wheels that occur in a cement factory. Failure analysis is done by testing the hardness of both the wheel and the rely which is considered to have failed or is no longer suitable for use. Then review the results of direct field observations with data from hardness tests and literature studies related to wheels and rails. after that it was concluded that the company considered for the procurement of rails and wheels. The conclusion obtained is that the hardness value on the rail is lower than on the wheel. Resulting in failure of the rail so that the rail must be replaced.
Perhitungan Struktur Laboratorium Teknik Sipil Type II Fakultas Teknik Universitas Muhammadiyah (UMSU) Medan Gunawan, Randi; Dewi, Irma; Gultom , Muhammad Husin; Ajinar
Journal of Engineering and Science Vol. 1 No. 1 (2022): January-June 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i1.5

Abstract

The lack of supporting infrastructure facilities such as the Laboratory at Samudra University, especially in the Civil Engineering Study Program, Faculty of Engineering, has resulted in Iskandar Thani Institute having to work hard in building infrastructure to keep pace with advances in technology and science. This study aims to plan the dimensions and reinforcement of beams, columns, plates and stairs in the Civil Engineering Laboratory building. The laboratory building to be analyzed has a total of 3 floors with floor dimensions of 43 m x 27.49 m. Modeling and analysis of the structure of this building is assisted by the SAP2000 program using the Special Moment Bearing Frame System (SPRMK) and is designed according to SNI 03-1726-2012, SNI 03-2847-2013, and PPPURG 1987. The structure is planned to use concrete quality fc' 30 MPa and steel grade fy 400 MPa. The results of the analysis obtained that the floor slab thickness was 13 cm using D10-200 mm reinforcement for main reinforcement and D10-300 mm for split reinforcement. The thickness of the roof slab is 12 cm using D10-200 mm reinforcement for main reinforcement and D10-300 mm for split reinforcement. The dimensions of the B1 beam are 50 cm x 70 cm using 12D25 for the support area with D10-80 mm braces and 8D25 reinforcement for the field area with D10-120 mm braces. Begel B2 30 cm x 50 cm using 4D25 reinforcement for the support area and field with braces for D10-200 mm field and braces for D10-100 mm support. The dimensions of the K1 column are 60 cm x 80 cm using 10D25 reinforcement with D10-300 mm begel. The dimensions of the K2 column are 60 cm x 60 cm using 8D25 reinforcement with D10 -200 mm begel. The thickness of the ladder plate and landing was obtained 13 cm using D10-200 mm reinforcement.
Perbandingan Daya Output Panel Surya Rooftop Berdasarkan Gerak Semu Matahari Studi Kasus Kota Banda Aceh Syukriyadin; Sara, Ira Devi; Syahrizal; Kadafi, Muamar
Journal of Engineering and Science Vol. 1 No. 2 (2022): July-December 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i2.106

Abstract

The research aims to get the best slope of the solar module to be placed on the roof of the building. This research will look at the performance of solar panels with varying slopes from various types in the city of Banda Aceh. The method used in this research is data collection by looking at the most significant output power from various slopes and comparing it with calculating the output power. The data from each month will also be compared so that the cross panel and the best tilt angle will be. From the research that has been done, it is found that in December and January, with the sun's declination angle of 23 ° and 20 ° North Latitude, the orientation of the solar panel installation is facing south with the best tilt angle of the solar panel is 20 ° -25 ° in December and 18 ° -24 ° in January. In July, the sun's declination is 21.2 ° North Latitude. The orientation of the solar panel installation is facing North, with the best tilt angle of the solar panel being 15 °.
Analyzing the Tensile Strength of AISI 1045 Coil Springs in Avanza 2020 Cars: A Comparative Study of Experimental Results using Simulation Technology Azhar
Journal of Engineering and Science Vol. 1 No. 2 (2022): July-December 2022
Publisher : Yayasan Kawanad

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56347/jes.v1i2.107

Abstract

One of the tests used to determine the mechanical properties of metals is the tensile test. The results obtained from the tensile test are crucial for engineering and product design as they provide data on the strength of materials. AISI 1045 carbon steel is an alloy steel composed of iron (Fe) and carbon (C), where iron is the base element and carbon is the main alloying element. Carbon steel is also used in the manufacturing of helical/coil springs (Mobil Alvanza 2020). Coil springs are widely used in the front suspension of modern light vehicles. A new approach to fatigue prediction based on a combination of FE simulation using ABAQUS is opposed in this study. In this research, the tensile test was performed using experimental and ABAQUS simulation methods. The experimental results showed a yield strength of 350.25 MPa and an ultimate tensile strength of 560.4 MPa, while the ABAQUS simulation results showed a yield strength of 356.05 MPa and an ultimate tensile strength of 560.39 MPa

Page 6 of 8 | Total Record : 75

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