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Ridwan Abdurrahman
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INDONESIA
Jurnal Surya Teknika
Published by Universitas Muhammadiyah Riau
ISSN : 23546751     EISSN : 27237222     DOI : 10.37859
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
a media of communication and reply forum for scientific works especially concerning the fields of industrial technology, machinery, and automotive.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 361 Documents
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Optimasi Rute Distribusi Ayam Broiler dengan Metode Nearest Neighbour: (Studi Kasus: di CV. Global Putra Swasembada) Mulyadi, Agus; Meirizha, St. Nova; Fanuddin, Obbie; Jusnita, Jusnita; Ali Ardi, Hendri
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7285

Abstract

Global Putra Swasembada is a company that distributes broiler chickens with a market area in Pekanbaru City. During the distribution process, the vehicle still has remaining capacity, which should be used to load customer orders in other areas. So, the number of tours formed and the number of vehicles used increases, which results in high distribution costs. An effective and efficient distribution method is needed to optimize distribution routes. The research uses the nearest-neighbour method to determine new routes. The results show that the distance of the existing route, which was previously 151.3 km, became 128.8 km, saving 22.5 km. The previous number of vehicles using 4 to 3 optimal vehicles. After calculating the distribution costs, the company paid the cost of Rp. 28,590,800 became Rp. 21,744,000, then there is a reduction in costs of Rp—6,846,800 or 14% every month.
Evaluasi Kontribusi Tenaga Kerja dan Perusahaan terhadap Laba Bersih BUMD: Studi Empiris di Sumatera Barat Ranti Mustika Putri; Hadigufri Triha; Alima Shofia; Beni Harma; Prima Fithri
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7317

Abstract

This study is motivated by the importance of understanding the factors influencing the net profit of Regional Owned Enterprises (BUMD) in West Sumatra Province, particularly in the context of the number of employees and the number of companies. The purpose of this research is to analyze the effect of the number of employees and the number of companies on the net profit of BUMD using multiple linear regression methods. The data used in this study were sourced from the Central Statistics Agency (BPS) for the period from 2013 to 2022. The results of the analysis indicate that the regression model is overall significant with an R2 adjusted value of 0,537, meaning that 53,7% of the variation in net profit can be explained by the number of employees and the number of companies. However, the individual effects of the number of employees and the number of companies on net profit are not statistically significant at the 95% confidence level. The conclusion of this study is that the number of employees and the number of companies collectively influence the net profit of BUMD, although the impact of each variable is not strong enough individually.
Pengaruh Variasi Interlayer Terhadap Hasil Sambungan Material Dissimilar Menggunakan Mesin Las Gesek Rotary Tegak Bar Plate Yohanes, Yohanes; Rafizan, Rafizan; Legisnal Hakim
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.6665

Abstract

The aim of this research is to determine the effect of variations in interlayer thickness on welding time, interface area and hardness values ​​in dissimilar material welded joints using a bar-plate upright rotary friction welding machine. The method used in this research: rotational speed 2,613 rpm, friction pressure 0.5 MPa, forging pressure 0.7 MPa, forging time 10 seconds and interlayer variations (without interlayer, 0.3 mm, 0.5 mm and 1 mm). Tests used in the research: liquid penetrant test, metallography, and Vickers. It can be analyzed that interlayer variations have an effect on welding time. The time results obtained from using an interlayer with a thickness of 0.3 mm resulted in a time of 142.1 seconds, a 0.5 mm interlayer of 168.7 seconds, and a 1 mm interlayer of 204.4 seconds. The results for specimens without using an interlayer obtained a time of 71.3 seconds. The thicker the interlayer used, the longer the welding time. In observing the interface area, giving interlayer variations of 0.3 mm, 0.5 mm and 1 mm had an effect on cracks and cavities where all specimens were not found to have cracks or cavities, but voids were found in welding without allowing interlayer variations. In testing the hardness of interlayer variations with a thickness of 1 mm, the highest hardness was found in the interface area with an average hardness value of 169.56 VHN. Meanwhile, the lowest hardness value in the interface area results from variations without an interlayer with an average hardness value of 149.07 VHN
Rancang Ulang Meja dan Kursi untuk Kelas 1 di SMK Negeri 3 Medan dengan Menggunakan Metode RULA dan Pahl & Beitz Ritonga, Wahyu Hidayat; Azis Syarif, Abdul; Walady Utama, Denny
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.6760

Abstract

SMKN 3 students use tables and chairs for approximately six hours a day during the teaching and learning process. If the sitting posture of this student is not correct, such as leaning forward or a footrest that is too high, of course it can cause pain in the waist and pain in the knees. This study aims to make tables and chairs that are comfortable for use by students of SMKN 3 MEDAN and to find out the design for ergonomic tables and chairs so that when using tables and chairs students do not feel pain in the waist or other complaints. This study resulted in a new table and chair design. Based on the calculation results, the results of the new chair dimensions were as follows: table height 71.15 cm, table length 58 cm, table width cm, seat cushion width 32 cm, seat cushion length 43 cm, height seat cushion 40 cm, backrest height 54 cm. The dimensions of the bag are 10 cm for width, 40 cm for height, 30 cm for length. Therefore the tables and chairs that have been redesigned are in accordance with the anthropometry of students at SMKN 3 MEDAN
Pengaruh Perbedaan Ukuran dan Massa Adsorben Pelepah Sawit Teraktivasi dalam Pemurnian Minyak Jelantah Menggunakan Metode Shaker Fithry, Dwi Annisa; Bode Haryanto; Naia Salsa Billah; Astrina Hutabarat; Hidayat Prayogo
JURNAL SURYA TEKNIKA Vol. 10 No. 2 (2023): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v10i2.6779

Abstract

Used oil more commonly referred to as used cooking oil is household waste that contains carcinogenic compounds which are very dangerous if consumed by the human, so that it does not become waste in the community can be used as raw material for making biodiesel. Used cooking oil processing can be done with the use of adsorbents so that used cooking oil becomes clear and its quality can be maintained. Palm Oil has the potential to be used as carbon which functions as an Adsorbent in the refining of used cooking oil. In this study, palm fronds were carbonized using pyrolysis with a temperature of 3500C then mashed and sifted with mesh sizes of 50, 70, and 100 mesh. Followed by the activation process using 0.1 M sulfuric acid solution (H2SO4) for 3 hours and then dried using an oven. The results of the study showed that the best turbidity was an adsorbent measuring 100 mesh with a mass of 4.5 grams, the final turbidity obtained with a value of 15.9 NTU with a total turbidity reduction of 108.6 NTU.
Perhitungan Ongkos Pemesinan Konvensional Menggunakan Macro Vba Excel pada Studi Kasus (Produk Roda Gigi Payung Ø65mm × Z24) Junaidi, Abdul Khair; Hasan, Indra; Syofian Arief, Dosi; Duta H, Ryan
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.6802

Abstract

In the conventional machining process, production costs are essential to know to determine the cost of making a product in any industrial manufacturing such as the SMK N 2 PEKANBARU machining workshop. Machining production costs are calculated based on machining time per product and machining operation costs. In calculating conventional machining costs, the VBA Excel macro is an application that can be used to calculate production costs. The Ø65mm × z24 umbrella gear product which is the research case study is a product that is machined by two conventional machining processes, namely lathe machining and milling machining. From the results of the research, the cost of conventional lathe machining, namely making gear wheels, is IDR 47,841/product, and the conventional milling process, namely making Z24 gears, is IDR 40,002/product, while the machining cost for lathe mastercam simulation is IDR 33,187/product and the machining cost for milling mastercam simulation is IDR 20,340/product. Machining costs are the product of operating costs per minute (cm) and machining time (tm). So, from the results of calculating machining and production costs, it is known that the product manufacturing costs or production costs for Ø65mm × Z24 umbrella gears are in the range of IDR 111,827 - IDR 146,143/product.
Analisis Kinerja Mesin Sterilizer (Rebusan) Menggunakan Metode Overall Equipment Effectiveness (OEE) di PTPN V Sei Buatan Satriardi, Satriardi; Kholid Darmawan, Bagus; Denur, Denur
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7159

Abstract

Sterilizer (boiling) machines are important in palm oil production in the palm oil processing industry. This study analyzes the performance at PTPN V Sei Buatan using the Overall Equipment Effectiveness (OEE) method. Observation and production data were used to calculate OEE, showing that the machine experienced significant downtime and low performance efficiency and product quality. Improvement recommendations, including routine maintenance, better maintenance scheduling, and operator training, are proposed to improve machine performance. The OEE method helps identify areas of improvement to increase operational efficiency and productivity at PTPN V Sei Buatan.
Pengaruh Geometri Basin Terhadap Aliran Vortex: Kajian pada Basin Conical, Conical Convex dan Silinder dengan CFD Kurniawan, Iwan; Heri Siswanto; Yohanes, Yohanes; Romy, Romy; Amir Hamzah
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7187

Abstract

This study aims to evaluate the influence of basin geometry on the formation and characteristics of vortex flow using Computational Fluid Dynamics (CFD). Three types of basin geometries were investigated: cylindrical, conical, and conical convex. CFD simulations were conducted to observe the velocity distribution, and vortex flow patterns generated by each basin. The results indicate that the conical basin produces vortex flows with higher intensity compared to the cylindrical and conical convex basins. The conical basin demonstrated a more focused flow pattern and higher vortex concentration around the central axis, contributing to enhanced vortex formation efficiency. Although the cylindrical and conical convex basins also generated vortex flows, they exhibited a more dispersed velocity distribution and less stable vortices. These findings provide important insights for the design and optimization of vortex turbine systems, particularly in the context of renewable energy applications.
Evaluasi Kinerja Steam Jet Ejector Tingkat Pertama Terhadap Kevakuman Kondensor Melkias, Alvera Apridalianti; Nuno Gomez, Shahrul
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7259

Abstract

The steam jet ejector is a device for extracting NCG from the condenser. NCG can increase the pressure in the condenser until a vacuum condition is not reached. The diffuser pressure on the steam jet ejector has a normal operational limit of below 1 atm, meaning that the ejector performance will be optimal if it is operated at the operational limit under vacuum conditions. The expected objectives are to determine the effect of the steam jet ejector on condenser vacuum, calculate the performance of the first level steam jet ejector through pressure analysis in the diffuser section, calculate the performance of the steam jet ejector in actual conditions compared to the design data conditions and analyze actions that can be taken to improve the performance of the tool. Based on the results of calculations and analysis, it was found that the increase in steam jet ejector pressure had an effect on the increase in condenser pressure from the design pressure of 0.10 bar to 0.107-0.123 bar under actual conditions. The decrease in steam jet ejector performance results in the condenser vacuum level decreasing, but the equipment performance is within normal operational limit conditions, namely below 1 atm. The decrease in steam jet ejector performance is influenced by the motive steam mass flow rate, NCG mass flow towards suction, entrainment ratio value, NCG pressure and motive steam pressure which exceeds the design data.
Perancangan Ulang Komponen Condensate Booster Pump pada System Re-Injeksi di PLTP X Adityawarman, Dzaky Fauzan Hilmy; Melkias, Alvera Apridalianti; Prayogo, Sapto
JURNAL SURYA TEKNIKA Vol. 11 No. 1 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i1.7288

Abstract

PLTP X is a power plant located in West Java, at this time PLTP X uses 2 condensate booster pumps that experience a discrepancy between the pump operation area specification and the actual condition. This problem causes vibration and decreased efficiency thus causing damage to the pump components. The purpose of this research itself is to design pump components in the form of impellers, shafts, pegs, & volutes. Another goal is to calculate the energy savings resulting from the design. This research has a quantitative and experimental nature. The data used is operational data of the PLTP X and other secondary data issued by the PLTP X. The required technical specifications are a head ±130 m, a capacity of 60 m3/h, a rotation of 2970 RPM & an efficiency > 60%. Based on the results of this study, it was obtained that the pump is a type of low discharge high pressure centrifuge, then the design of this pump has a head of 128.4 m, a capacity of 60 m3/h, an efficiency of 67% and has succeeded in saving energy of 107586.16 kWh per year at its point of operation.

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