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JURUTERA (Jurnal Umum Teknik Terapan)
Published by Universitas Samudra
ISSN : 23565438     EISSN : 23565438     DOI : https://doi.org/10.55377/jurutera.v10i02.8268
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Mechanical Engineering
Jurnal Ilmiah Jurutera menerbitkan dalam berbagai topik dalam bidang rekayasa dan sains yang dapat dikategorikan kedalam tema-tema berikut: - Teknik Elektro dan Informatika - Teknik Geologi dan Pertambangan - Teknik Arsitektur dan Perencanaan Wilayah dan Kota - Teknik Mesin dan Industri - Teknik Sipil dan Lingkungan - Teknik Perkapalan, Sistem Perkapalan, dan Kelautan - Multidisiplin
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 177 Documents
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Analisa Pengaruh Parameter Line Width Terhadap Kekuatan Tarik Hasil Cetak Menggunakan 3D Printer Sabri, Faris Ahmad Mizanus; Kamil, Syahiir; Sumawijaya; Bahri Widodo, Syamsul; Arif Adlie, Taufan; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12351

Abstract

3D printers of the extrusion type, also known as Fused Deposition Modelling (FDM), are widely used to create products from polymer materials in the desired shapes, such as bricks, holders, toys, and so on. The quality of the printed results is significantly influenced by the process parameters that can be adjusted. This study aims to analyze the effect of the line width parameter on the tensile strength of the prints produced using extrusion-type 3D printers. The specimen design follows the ASTM D638 type IV standard, with variations in the line-width printing parameters: 0.3 mm (P1), 0.4 mm (P2), and 0.5 mm (P3). The specimens were printed in PLA. Testing was conducted on 9 specimens, 3 for each line width parameter (P1, P2, P3), using a Universal Testing Machine. The average tensile strength values obtained were 27.97 MPa (P1), 31.61 MPa (P2), and 30.52 MPa (P3). The highest tensile strength was achieved with a line width of 0.4 mm. The results of the study indicate that the line width parameter affects the tensile strength of the printed results. Determining appropriate printing parameters can improve the quality of the printed product.
Heat Transfer Analysis of Deep Coaxial Geothermal Heat Exchangers: Insights Into Heat-Flux Distribution on Borehole Wall Ujung, Idris; A. Abdullah, Nasruddin; Suheri
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.12095

Abstract

Briquettes are solid fuel that can be used as an alternative energy source. Making biocharcoal briquettes is one way to convert a biomass energy source into another biomass by compressing it and making it into a more regular shape. In this research, red calliandra wood was used using the pyrolysis method, temperature variations and adhesive variations. The pyrolysis temperatures used are 300°C, 400°C, and 500°C with a pyrolysis time of 60 minutes. Then the briquettes are molded with a ratio of charcoal and molasses (cane molasses) 90%:10% and 70%:30%. Briquettes are tested using the SNI 01-6235-2000 method, namely calorific value, water content, ash content and volatile matter. Of the 6 samples taken, almost all met the standards and sample A briquettes obtained the best results with a composition of 90% charcoal and 10% adhesive at a temperature of 500, producing a calorific value of 6945.67 cal/gr, water content of 6.35%, ash content of 7, 76%, volatile matter 10.81% and bound carbon 77.72%.
Experimental Investigation of Thermal Performance of Concrete Walls Incorporating Paraffin-Aluminum Phase Change Material” Idris, Muhammad; Amin, Muhammad; Arif, Zainal
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.13324

Abstract

High ambient temperatures in tropical regions contribute to increased energy consumption for indoor cooling systems. One passive thermal control method that can be applied is the use of Phase Change Material (PCM) as a latent heat storage medium. This study aims to analyze the effect of paraffin-aluminum PCM incorporation on the thermal performance of concrete walls through experimental testing. Four concrete wall prototypes with dimensions of 30 cm × 30 cm × 15 cm were prepared, consisting of a control wall without PCM and walls containing PCM layers with thicknesses of 2 cm, 3 cm, and 5 cm. The experiment was conducted under 200-watt lamp radiation for 16 hours, with temperature measurements recorded at three observation points using K-type thermocouples connected to a data logger. The results indicate that the incorporation of PCM reduced the wall surface temperature compared to the control wall. The 2 cm PCM specimen reduced the temperature by 18–22%, while the 3 cm PCM specimen achieved a 24.6% reduction. The best thermal performance was obtained from the 5 cm PCM specimen, with temperature reductions of 26.8% at the upper point, 22.9% at the middle point, and 19.2% at the lower point. Increasing PCM thickness improved the heat storage capacity and enhanced the wall’s ability to suppress surface temperature rise. The paraffin-aluminum PCM combination demonstrates potential as a passive thermal control material for building walls in tropical climates.
Numerical Analysis of the Wake Interactions Between Two Tandem Cylinders at a Reynolds Number of 1×10^5 Tambunan, Muhammad Fadli; Cut, Banta; A.Abdullah, Nasruddin
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.13419

Abstract

Circular cylinders are a geometric shape widely utilized in engineering applications such as electricity poles, offshore piles, subsea pipelines, and heat exchangers, where the drag force fluctuations experienced by two tandem-arranged cylinders are known to be determined by the longitudinal spacing ratio (L/D); previous studies were conducted at a Reynolds number of 6.5 x 104. This foundation led to the initiative for further numerical simulation research aimed at analyzing the effect of L/D variations (1.5, 2.0, 3.0, and 4.0) on the flow characteristics around two such cylinders at a higher Reynolds number (1X10), utilizing a cylinder diameter (d) of 25 mm within a narrow square channel (H = 300 mm and L = 1500 mm). This study was performed using 2D unsteady RANS via Ansys Fluent Student R2 2021, employing a structured mesh and the k-ω SST turbulence model. The results revealed that the L/D = 1.5 variation shows a significantly lower rear pressure compared to L/D = 2.0, 3.0, and 4.0, where the largest pressure difference between the front (high) and the rear (very low and negative) indicates the highest pressure drag, a characteristic dominated by earlier flow separation and a large wake. Conversely, the L/D = 3.0 variation demonstrated the lowest upstream cylinder CD value (0.734) among all variations, suggesting optimal reduction, while the lowest downstream cylinder CD value (0.209) was recorded at the L/D = 1.5 spacing.
Analisi Laju Aliran Massa Minyak Jelantah Dan Evaluasi Efisiensi Ekonomi Pada Kompor UMKM Kerupuk Wahyu Abdillah; Syamsul Bahri Widodo; Fazri Amir
JURUTERA - Jurnal Umum Teknik Terapan Vol 13 No 01 (2026)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v13i01.12152

Abstract

Waste cooking oil has considerable potential as an alternative fuel for small-scale food industries, particularly for reducing waste and supporting sustainable energy utilization. However, information regarding the mass flow characteristics of waste cooking oil burners for MSME applications remains limited. This study aims to analyze the mass flow rate of a waste cooking oil burner designed for cracker production and evaluate its operational feasibility based on fuel consumption and operating cost. The experimental system consisted of a self-designed dual-burner stove equipped with flow meter sensors, anemometers, and an Arduino-based data acquisition system. The results showed that the mass flow rates of burner 1 and burner 2 were 0.00691 kg/s and 0.00520 kg/s, respectively, with an air velocity of 4.2 m/s for both burners. Operational testing indicated that approximately 0.480 L of waste cooking oil was consumed to fry 1 kg of crackers. Economic evaluation revealed that although waste cooking oil required higher operational costs than firewood under the investigated conditions, its availability from production waste offers potential as an alternative fuel for MSME applications. These findings provide useful baseline information for the design and optimization of waste cooking oil burner systems in small-scale food processing industries.
Numerical Simulation of Two Circular Cylinders Arranged In-line in a Narrow Channel with a Reynolds Number of 1.0x10^5 Zulfikar; Banta Cut; Suheri
JURUTERA - Jurnal Umum Teknik Terapan Vol 13 No 01 (2026)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v13i01.13616

Abstract

The flow of fluid around the circular cylinder (bluff body) is a fundamental problem in engineering with a wide range of applications, such as in offshore buffer pipes and chimneys. A common phenomenon is the emergence of drag forces, elevator forces, and vortex shedding. This study aims to reduce drag and lift forces in the arrangement of two circular cylinders arranged in line in narrow channels. The variation in the distance between cylinders was tested at T/D = 2.0, 2.5, 3.0, and 4.0 ratios (cylinder diameter D = 25 mm). Reduction efforts are made by placing the disruptor body (d=4) at an angle (0°, 120°, 240°) around the perimeter of the array. Numerical simulation was performed using the 2D unsteady RANS method with Ansys Student Fluent® 2021 software and the turbulence model (K-ω SST) at Reynolds numbers (Re = 1.0x10⁵) in cross-sectional channels (H = 300 mm, L = 150 mm). The results showed that at the T/D = 4.0 ratio, the wake interaction between the two cylinders was no longer dominant. The addition of a disruptor body at an angle (0°, 120°, 240°) has also been shown to be very effective in reducing the drag coefficient (CD) of both cylinders. The CD value in cylinder 1 without a disruptor body is 0.762 and with a disruptor body reaches 1.148 (reduction: [percentage with disruptor body Cyl 1]), while in cylinder 2, CD without a disruptor body is 0.762 and with a disruptor body, it reaches 1.148 (reduction: [percentage with disruptor body Cyl 2]). There are contradictions in the results data. The reduced CD values (1.148 and 1.148) were actually higher than the CD values without the disruptor body of 0.762 and 0.762, although the text states that there is a reduction and that it is very effective.
Numerical Study of Flow Characteristics Across Circular Cylinders and Sliced Cylinders of Type-D and Type-I Near Flat Walls Muhammad Azhari; Banta Cut; Nasruddin A. Abdullah
JURUTERA - Jurnal Umum Teknik Terapan Vol 13 No 01 (2026)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v13i01.13819

Abstract

Numerical simulations using the Ansys Fluent 2025 R2 CFD solver were conducted to investigate the unsteady and incompressible fluid flow characteristics around circular, D-type, and I-type cylinders positioned near a flat wall. The modified geometries for the D-type and I-type cylinders featured a cutting angle of 65°. This study evaluates the flow dynamics across various gap ratios (G/D) between the cylinders and the flat wall, specifically 0.05, 0.0833, and 0.1167. All simulations were performed at a Reynolds number (Re) of 5.3 using the k-SST turbulence model. The results indicate that decreasing the gap ratio triggers a significant blockage effect, characterized by flow acceleration (jetting) within the lower gap area. Qualitatively, increasing the G/D ratio is shown to delay flow separation and narrow the wake region. Visualizations of velocity and vorticity magnitude confirm that the interaction between the wall boundary layer and the cylinder's shear layer at small gaps inhibits organized vortex formation, although flow stability improves as the gap distance increases.
Characterization of Sugarcane Bagasse–Coconut Shell Biomass Briquettes Using a Damar Resin–Tapioca Starch Composite Binder: Proximate Analysis, Calorific Value, and Combustion Performance Syamsul Bahri Widodo; Zainal Arif; Satriawan Sagino
JURUTERA - Jurnal Umum Teknik Terapan Vol 13 No 01 (2026)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v13i01.13824

Abstract

The utilization of biomass waste as a renewable energy source offers a sustainable approach to reducing dependence on fossil fuels while increasing the economic value of agro-industrial residues. Sugarcane bagasse is widely available but has relatively low energy characteristics, making it necessary to combine it with high-carbon biomass such as coconut shell. This study investigated the effect of different proportions of sugarcane bagasse charcoal and coconut shell charcoal, bonded with a composite adhesive of damar resin and tapioca starch, on the proximate characteristics, calorific value, and combustion performance of biomass briquettes. An experimental method was employed using five charcoal compositions (90:10, 80:20, 70:30, 60:40, and 50:50). Briquette characterization included moisture content, ash content, volatile matter, fixed carbon, calorific value measured using a bomb calorimeter, and combustion performance evaluated by measuring flame, container, water, and ambient temperatures with a K-type thermocouple. The results showed that increasing the proportion of coconut shell charcoal increased the calorific value from 6,561.491 cal g⁻¹ to 7,119.492 cal g⁻¹, and all briquette compositions satisfied the minimum requirement of SNI 01-6235-2000. The 70:30 composition exhibited the highest heat transfer efficiency, whereas the 90:10 composition produced the highest flame temperature. These findings demonstrate the potential of sugarcane bagasse–coconut shell briquettes as a sustainable alternative solid fuel.
Peningkatan Efisiensi Pemesinan Mesin Cnc Training Unit (Tu) 2 – Axis Unimat Uni Dreh Estop Melalui Integrasi Software Cad/Cam Kamarullah; Taufan Arif Adlie; Suheri; Syamsul Bahri Widodo
JURUTERA - Jurnal Umum Teknik Terapan Vol 12 No 02 (2025)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v12i02.14187

Abstract

This study aims to enhance machining efficiency on the CNC Training Unit (TU) 2-Axis Unimat Uni Dreh Estop machine by integrating CAD/CAM software using Mastercam 2020. The research methods included creating 2D and 3D designs, generating toolpaths, simulating tool feed movements, converting designs into G-Code, and conducting tests on a 2-Axis CNC Turning machine. The workpiece material used was an aluminium blank measuring Ø12 × 100 mm. The results showed that the use of Mastercam significantly improved the efficiency of CNC program creation compared to the manual method. The total machining process time was reduced from 43.02 minutes to 28.02 minutes. In addition, the simulation feature in Mastercam was able to minimize programming and operational errors before the machining process was carried out. The machining results also demonstrated a level of precision consistent with the designed specifications. Therefore, the integration of CAD/CAM software into the CNC Turning 2-Axis TU Unimat Uni Dreh Estop machine can enhance the effectiveness and efficiency of the machining process while reducing the risk of errors in the production process.
Analysis of the Use of Tubular Scaffoldings at PT. Medco E&P Malaka Asset Block-A Aceh Timur Fadly; Yuslinda; Iqbal
JURUTERA - Jurnal Umum Teknik Terapan Vol 13 No 01 (2026)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v13i01.14345

Abstract

Tubular scaffolding is a construction system that uses steel pipes as a basic frame to support various construction materials, such as sand, stone, cement, and wood. The aim of the study is the types/components that make up tubular scaffolding, the use of tubular scaffolding in accordance with applicable regulations, and how to install, maintain, and dismantle tubular scaffolding used at PT. Medco E&P Malaka. In this study, the conditional probability analysis method was used to determine the use of tubular scaffolding used by PT. Medco E&P Malaka regarding the types/components and applicable regulations. The results of conditional probability data analysis from this research show that the types/components that make up tubular scaffolding and also the regulations for the use of tubular scaffolding used at PT. Medco E&P Malaka show a P(H | E comb) value of 1.00. From the results of this analysis, it can be interpreted that the use of tubular scaffolding meets the types/components and regulations applicable to the erection of a scaffold.

Page 17 of 18 | Total Record : 177

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